hibernate+spring+struts运行中出错

Question

当跳转到.do文件时出错：
--------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception javax.servlet.ServletException: java.lang.ClassCastException: com.user.web.form.UserForm cannot be cast to org.apache.struts.validator.DynaValidatorForm
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.common.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:20)
root cause java.lang.ClassCastException: com.user.web.form.UserForm cannot be cast to org.apache.struts.validator.DynaValidatorForm
com.user.web.action.UserAction.save(UserAction.java:49)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.common.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:20)
这是什么错？我该怎么改？请指教！

Answer 1

类型转换异常啊
你的actionForm是不是继承的类没有写对啊

Answer 2

应该是没有继承DynaValidatorForm类

Answer 3

java.lang.ClassCastException: com.user.web.form.UserForm cannot be cast to org.apache.struts.validator.DynaValidatorForm 
com.user.web.action.UserAction.save(UserAction.java:49) 
错误在UserAction.save方法的49行
你的com.user.web.form.UserForm应该继承ActionForm

Answer 4

谢谢，楼上各位。谢谢按照你们说的去检查了。可...无奈之下重启MyEclipse，自己好了，真郁闷！

Answer 5

ECLIPSE有时候也会刷小性子，哈哈