空指针错误
[07-4-17   10:09:58:721   CST]     2e31063   RequestProces   W   org.apache.struts.action.RequestProcessor     Unhandled   Exception   thrown:   class   java.lang.NullPointerException
[07-4-17   10:10:02:717   CST]     2e31063   WebGroup             E   SRVE0026E:   ［Servlet   错误］－［］：java.lang.NullPointerException
at   com.exp.actions.InfoDetailAction.execute(InfoDetailAction.java:34)
at   org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at   org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at   org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at   org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at   com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at   com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at   com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at   com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at   com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
at   com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at   com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at   com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:1019)
at   com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:592)
at   com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:204)
at   com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:125)
at   com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:286)
at   com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at   com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:182)
at   com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
at   com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at   com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:615)
at   com.ibm.ws.http.HttpConnection.run(HttpConnection.java:449)
at   com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:912)

------解决方案--------------------
在你InfoDetailAction类的34行发生了空指针错误，看看那行的什么变量是空值，将其初始化一下。
------解决方案--------------------
经验表明是空指针实例化造成的,原因比较多
常见的是 a.equals( "abc "),但是a=null
------解决方案--------------------
你的id没传过来把
或者request.getAttribute( "id ")里面的id名字错了
你确定一下有没有传一个叫id的参数过来
------解决方案--------------------
这里request.getAttribute( "id ")可能没有取到值 仔细检查下