一个季度没来了《送点分给大家》

Question

Http Status 500  500 内部服务器错误
服务器遇到了一个内部错误而无法完成请求。
java.lang.NullPointerException
at _jspx._document._ifr_5foperation_5fform__jsp._jspService(document/jspf/documentFileTitle.jspf:432)
at com.apusic.web.jsp.runtime.HttpJspPageImpl.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at com.apusic.web.container.ServletComponent.service(Unknown Source)
at com.apusic.web.container.WebContainer.invoke(Unknown Source)
at com.apusic.web.container.WebContainer.invoke(Unknown Source)
at com.apusic.web.jsp.JspServlet.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at com.apusic.web.container.ServletComponent.service(Unknown Source)
at com.apusic.web.container.ServletFilterWrapper.doFilter(Unknown Source)
at com.apusic.web.container.FilterChainImpl.doFilter(Unknown Source)
at filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:52)
at com.apusic.web.container.FilterComponent.doFilter(Unknown Source)
at com.apusic.web.container.FilterChainImpl.performFilter(Unknown Source)
at com.apusic.web.container.WebContainer.invoke(Unknown Source)
at com.apusic.web.container.WebContainer.processRequest(Unknown Source)
at com.apusic.web.http.VirtualHost.processRequest(Unknown Source)
at com.apusic.web.http.HttpServer.processRequest(Unknown Source)
at com.apusic.web.http.HttpConnectionHandler.service(Unknown Source)
at com.apusic.web.http.ConnectionHandler.processRequest(Unknown Source)
at com.apusic.web.http.ConnectionHandler.processConnection(Unknown Source)
at com.apusic.web.http.ConnectionHandler.run(Unknown Source)
at com.apusic.util.ThreadPoolImpl$WorkerThread.run(Unknown Source)--------------------------------------------------------------------------------如何定位？ 已经确认documentFileTitle.jspf里面没有问题！

Answer 1

设个断点到SetCharacterEncodingFilter.java 中试试

Answer 2

找到编译后的java文件，找432行，贴上这一行的相关代码

Answer 3

说实话，LZ还不如直接把源码和service贴出来。最少把这一行写的是什么贴出来把。nullpointer无非就是你传参数的时候没有传过来。顺着程序的整体执行逻辑看一遍就明白了。主要看看你前台拿到了对象没有

Answer 4

打开编译过的jsp页面找吧，空指针哦