ajax开发时,出现错误,百思不得其解.

4:44:54,718 ERROR [[/EpressPublish]] StandardWrapper.Throwable
java.lang.ClassFormatError: uk/ltd/getahead/dwr/impl/DefaultInterfaceProcessor (Truncated class file)
	at java.lang.ClassLoader.defineClass0(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
	at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1629)
	at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:850)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1299)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1181)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:141)
	at uk.ltd.getahead.dwr.impl.DefaultContainer.addParameter(DefaultContainer.java:51)
	at uk.ltd.getahead.dwr.DWRServlet.getContainer(DWRServlet.java:62)
	at uk.ltd.getahead.dwr.AbstractDWRServlet.init(AbstractDWRServlet.java:94)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1091)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:750)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:130)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
	at java.lang.Thread.run(Thread.java:534)
14:44:54,718 ERROR [[dwr-invoker]] Allocate exception for servlet dwr-invoker
java.lang.ClassFormatError: uk/ltd/getahead/dwr/impl/DefaultInterfaceProcessor (Truncated class file)
	at java.lang.ClassLoader.defineClass0(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
	at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1629)
	at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:850)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1299)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1181)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:141)
	at uk.ltd.getahead.dwr.impl.DefaultContainer.addParameter(DefaultContainer.java:51)
	at uk.ltd.getahead.dwr.DWRServlet.getContainer(DWRServlet.java:62)
	at uk.ltd.getahead.dwr.AbstractDWRServlet.init(AbstractDWRServlet.java:94)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1091)
	at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:750)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:130)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
	at java.lang.Thread.run(Thread.java:534)

 在它的DWR.XML文件中,已经配置转换类型,但这是个错误是因为什么引起的呢.不解!!

 

 

在网上查看许多的文件,也没有具体的做法.后来去查看相关的官方文档.

看到这样一句,才知道

public class ClassFormatError

extends LinkageError

Thrown when the Java Virtual Machine attempts to read a class file and determines that the file is malformed or otherwise cannot be interpreted as a class file.

 

是因为文件有损坏或编译后的CLASS文件有错误.

 

这下好办了.把工程全部clear .再运行.OK.一切正常!!!!