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longxitian：
https://www.cnblogs.com/jeffen/ ...
万恶的Mybatis的EnumTypeHandler -
asialee：
ddnzero 写道博主请问FileUtils这个类是哪个包的 ...
使用mockftpserver进行ftp测试 -
ddnzero：
博主请问FileUtils这个类是哪个包的？还是自己的呢？能放 ...
使用mockftpserver进行ftp测试 -
yizishou：
为什么会intMap.get("bbb") ...
浅谈System.identityHashCode -
liguanqun811：
感觉LogManager打开了所有的LogSegment（文件 ...
jafka学习之LogManager
西安交大的网站报错了，记录下出错日志，改天研究一下。
HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: org.springframework.dao.DataAccessResourceFailureException: Hibernate operation: could not execute query; SQL [select jdsyscateg0_.flbh as flbh12_, jdsyscateg0_.flmc as flmc12_, jdsyscateg0_.fulbh as fulbh12_, jdsyscateg0_.glbh as glbh12_, jdsyscateg0_.yxgjz as yxgjz12_, jdsyscateg0_.gjzts as gjzts12_, jdsyscateg0_.yxtp as yxtp12_, jdsyscateg0_.tpts as tpts12_, jdsyscateg0_.yxzw as yxzw12_, jdsyscateg0_.zwts as zwts12_, jdsyscateg0_.cjsj as cjsj12_, jdsyscateg0_.cjr as cjr12_, jdsyscateg0_.cjrip as cjrip12_, jdsyscateg0_.sfqy as sfqy12_, jdsyscateg0_.by2 as by15_12_ from jd_sys_category jdsyscateg0_ where jdsyscateg0_.fulbh=1]; No operations allowed after connection closed. Connection was closed due to the following exception: ** BEGIN NESTED EXCEPTION ** java.sql.SQLException MESSAGE: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** STACKTRACE: java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1707) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** ; nested exception is java.sql.SQLException: No operations allowed after connection closed. Connection was closed due to the following exception: ** BEGIN NESTED EXCEPTION ** java.sql.SQLException MESSAGE: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** STACKTRACE: java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1707) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) root cause org.springframework.dao.DataAccessResourceFailureException: Hibernate operation: could not execute query; SQL [select jdsyscateg0_.flbh as flbh12_, jdsyscateg0_.flmc as flmc12_, jdsyscateg0_.fulbh as fulbh12_, jdsyscateg0_.glbh as glbh12_, jdsyscateg0_.yxgjz as yxgjz12_, jdsyscateg0_.gjzts as gjzts12_, jdsyscateg0_.yxtp as yxtp12_, jdsyscateg0_.tpts as tpts12_, jdsyscateg0_.yxzw as yxzw12_, jdsyscateg0_.zwts as zwts12_, jdsyscateg0_.cjsj as cjsj12_, jdsyscateg0_.cjr as cjr12_, jdsyscateg0_.cjrip as cjrip12_, jdsyscateg0_.sfqy as sfqy12_, jdsyscateg0_.by2 as by15_12_ from jd_sys_category jdsyscateg0_ where jdsyscateg0_.fulbh=1]; No operations allowed after connection closed. Connection was closed due to the following exception: ** BEGIN NESTED EXCEPTION ** java.sql.SQLException MESSAGE: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** STACKTRACE: java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1707) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** ; nested exception is java.sql.SQLException: No operations allowed after connection closed. Connection was closed due to the following exception: ** BEGIN NESTED EXCEPTION ** java.sql.SQLException MESSAGE: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** STACKTRACE: java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1707) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.translate(SQLStateSQLExceptionTranslator.java:113) org.springframework.orm.hibernate3.HibernateAccessor.convertJdbcAccessException(HibernateAccessor.java:424) org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:411) org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:371) org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:844) org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:836) edu.xjtu.impl.DaoHibernateImpl.find(DaoHibernateImpl.java:82) edu.xjtu.struts.action.Index2Action.Navigate(Index2Action.java:100) edu.xjtu.struts.action.Index2Action.list(Index2Action.java:194) sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) root cause java.sql.SQLException: No operations allowed after connection closed. Connection was closed due to the following exception: ** BEGIN NESTED EXCEPTION ** java.sql.SQLException MESSAGE: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** STACKTRACE: java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null ** BEGIN NESTED EXCEPTION ** java.io.EOFException STACKTRACE: java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1388) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1532) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1707) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1923) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1163) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1272) at com.mysql.jdbc.Connection.execSQL(Connection.java:2236) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1555) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1533) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at org.springframework.orm.hibernate3.HibernateTemplate$37.doInHibernate(HibernateTemplate.java:988) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:978) at edu.xjtu.impl.DaoHibernateImpl.findByCriteria(DaoHibernateImpl.java:108) at edu.xjtu.struts.action.Index2Action.left(Index2Action.java:276) at edu.xjtu.struts.action.Index2Action.detail(Index2Action.java:291) at sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) ** END NESTED EXCEPTION ** com.mysql.jdbc.Connection.checkClosed(Connection.java:2459) com.mysql.jdbc.Connection.prepareStatement(Connection.java:1356) com.mysql.jdbc.Connection.prepareStatement(Connection.java:1336) org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:442) org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:368) org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:105) org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1561) org.hibernate.loader.Loader.doQuery(Loader.java:661) org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) org.hibernate.loader.Loader.doList(Loader.java:2145) org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) org.hibernate.loader.Loader.list(Loader.java:2024) org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375) org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308) org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153) org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106) org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) org.springframework.orm.hibernate3.HibernateTemplate$31.doInHibernate(HibernateTemplate.java:853) org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366) org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:844) org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:836) edu.xjtu.impl.DaoHibernateImpl.find(DaoHibernateImpl.java:82) edu.xjtu.struts.action.Index2Action.Navigate(Index2Action.java:100) edu.xjtu.struts.action.Index2Action.list(Index2Action.java:194) sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) edu.xjtu.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:27) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.18 logs. Apache Tomcat/6.0.18
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西安交通大学810电路课程是该校电气工程及其自动化专业的重要学科基础课程，其历年考研真题汇编对于备考的学生来说是一份极其宝贵的参考资料。这份资料集合了过去多年的考试试题，涵盖了电路理论的主要知识点，旨在...
西安交通大学的博士学位论文是学术研究的重要成果，反映了在校博士生在某一专业领域的深入探究和创新。这篇论文可能涵盖了计算机科学、电子工程、机械工程、生物医学等多领域的研究，但具体主题无法仅从文件名中得知...
西安交通大学高等数学（一）上册MOOC慕课期末考答案 适用于西安交通大学大一级学生/适用MOOC慕课网学习高等数学（一）上册课程者 李继成、赵小艳、吴慧卓、李萍、王勇茂、戴永红、张芳、常争鸣、武忠祥、李换琴、张...
"西安交通大学概率论与数理统计试题及答案" 概率论与数理统计是数学的一个分支，研究随机事件的概率和统计规律。西安交通大学的概率论与数理统计试题及答案涵盖了概率论和数理统计的主要知识点，包括随机事件、概率...
西安交通大学的电机学课件，以其高质量的教学资源，深受学生和教师的喜爱。以下是对该课件中可能涵盖的重要知识点的详细解析： 1. **电磁基本定律**：课件可能会详细介绍法拉第电磁感应定律、安培环路定律、库仑...
这是西安交通大学计算机研究生人工智能课程的，供大家学习和参考！
直流电机是一种能够将机械能转换成直流电能的设备，同时也可以作为电动机使用，将直流电能转换为机械能。直流电机的种类包括直流发电机和直流电动机，它们在调速性能要求较高的场合得到了广泛的应用。...
西安交通大学《高等数学》期末考试复习题多套包含丰富的高等数学知识点，涵盖了函数的极限、导数、积分、微分方程、曲线的性质等重要内容。 一、极限与连续性 题目中出现了求解极限的问题，比如(lim_{x \to \infty}...
在准备考研特别是目标为西安交通大学的软件工程专业的学生，数据结构是不可或缺的一门专业课程。西安交大的数据结构考研真题资料，提供了重要的历年试题及解答，有助于考生更好地理解和掌握数据结构的知识点，为考研...
根据提供的文件信息，我们可以了解到一系列和西安交通大学计算方法A课程相关的知识点。下面将对文件中提及的概念和方法进行详细解释。 首先，文件提到的“有效数字”是指在数值计算中保留的有意义的数字位数，它...
西安交通大学的信息论课程是计算机科学与通信工程领域的一门核心课程，主要研究信息的度量、编码、传输和处理的理论与方法。该课程的课件和作业答案为我们提供了深入理解信息论概念、原理和应用的宝贵资源。 一、...
西安交通大学出版的《工程数学 复变函数》第四版是学习这一领域的经典教材。这本书旨在帮助学生理解和掌握复变函数的基本理论，同时提供了解决实际问题的方法。 在复变函数的学习中，首先要理解复数的基本概念，...
西安交通大学的嵌入式系统专题实验是针对大四学生设计的一系列高级实践课程，旨在深化学生对嵌入式技术的理解并提升其实际操作能力。实验报告集合包含了多个实验项目，这些项目涵盖了嵌入式系统开发的多个核心领域，...
资源名称：西安交通大学《面向对象程序设计》课程视频（36集）资源目录：【】西安交通大学面向对象程序设计(1)【】西安交通大学面向对象程序设计(10)【】西安交通大学面向对象程序设计(11)【】西安交通大学面向对象...
《西安交通大学鼓励学生参加学科科技竞赛实施办法》是西安交通大学为了激发学生在学科领域的科技热情，提高其科技创新能力和团队合作精神，特别制定的一套鼓励和支持学生参加各类科技竞赛的规章制度。通过对文件内容...
资源名称：西安交通大学《编译原理》课程视频（54集）资源目录：【】西安交通大学编译原理(1)【】西安交通大学编译原理(10)【】西安交通大学编译原理(11)【】西安交通大学编译原理(12)【】西安交通大学编译原理(13)...
本文将针对西安交通大学数字信号处理实验报告中关于频率采样型滤波器的内容进行详细阐述，以期帮助读者深入理解该滤波器的设计原理与应用实践。 首先，频率采样型滤波器作为数字信号处理领域中的一种重要工具，它...