java ssh 开发遇到的困难

1 There is no Action mapped for namespace / and action name savesavaKws. - [unknown location]
原因:D:\apache-tomcat-6.0.18\webapps\kwstest   一查看没有src
2 Error building results for action savesavaKws in namespace  - action - file:/D:/apache-tomcat-6.0.18/apache-tomcat-6.0.18/webapps/kwstest2/WEB-INF/classes/struts.xml:20:94
jsonplugin-0[1].30.jar  就是这个包的原因   妈的  有这个包必须要有josn-lib 包

3 Caused by: java.lang.NoClassDefFoundError: org/apache/commons/fileupload/RequestContext    commons-fileupload.jar 少
4 java.lang.NoClassDefFoundError: javax/transaction/TransactionManager  缺少jtd包
5 org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update   少表
6 空指针异常   是因为没有new 开辟内存空间
7 Exception in thread "main" org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: com.kws.example.model.Dm; nested exception is org.hibernate.MappingException: Unknown entity: com.kws.example.model.Dm
忘写hbm.xml文件了
8 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'energySessionFactory' defined in class path resource [beans_energy.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Association references unmapped class: com.kws.example.model.Cm
Association references unmapped class  是没有影射的例子
9 aused by: org.hibernate.DuplicateMappingException: Duplicate collection role mapping com.kws.example.model.Dm.cms
重复影射的map dm

10 http://lavasoft.blog.51cto.com/62575/39279 hibernate 一对一影射