org.apache.catalina.core.StandardWrapperValve invoke 报的是空引用异常

Question

null
2010-5-31 17:49:11 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
java.lang.NullPointerException
at com.tyg.cool.web.action.MessageAction.doMess(MessageAction.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
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:274)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:194)
at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:106)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
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 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.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)

Answer 1

at com.tyg.cool.web.action.MessageAction.doMess(MessageAction.java:54)
错误在MessageAction的54行啊

Answer 2

  public ActionForward doMess(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
MessageForm messageForm = (MessageForm) form;
Message message=null;
Message mess=messageForm.getItem();
System.out.println(messageForm.getItem());
System.out.println(messageForm.getItem().getName());
//      Message message=(Message)request.getSession().getAttribute("item");
//      System.out.println(message);
//      System.out.println(message.getName());
//      System.out.println(message.getTel());

System.out.println(mess.getName());
System.out.println(mess.getTel());

message.setName(mess.getName());
message.setTel(mess.getTel());
message.setEmial(mess.getEmial());
message.setAddress(mess.getAddress());
message.setQq(mess.getQq());
message.setMobile(mess.getMobile());
message.setInfo(mess.getInfo());

this.messageBiz.addMess(message);
return mapping.findForward("success");
}   调试总是报空 ，从页面用Request直接获取也获取不到。