碰到貌似是JSP字段的问题，不明白问题出在哪里 求助下，谢谢各位大大了！在线等，很急，谢谢

Question

2011-6-26 20:06:02 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.NumberFormatException: For input string: "mailCode"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:447)
at java.lang.Integer.parseInt(Integer.java:497)
at javax.el.ListELResolver.coerce(ListELResolver.java:167)
at javax.el.ListELResolver.getValue(ListELResolver.java:51)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
at org.apache.el.parser.AstValue.getValue(AstValue.java:123)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:938)
at org.apache.jsp.viewAllMailMessages_jsp._jspx_meth_c_005fout_005f1(viewAllMailMessages_jsp.java:227)
at org.apache.jsp.viewAllMailMessages_jsp._jspx_meth_c_005fforEach_005f0(viewAllMailMessages_jsp.java:133)
at org.apache.jsp.viewAllMailMessages_jsp._jspService(viewAllMailMessages_jsp.java:87)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:142)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:247)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1105)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:841)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:755)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:350)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
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 net.project.filter.LoginFilter.doFilter(LoginFilter.java:39)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
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:127)
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:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)

Answer 1

jsp表单的mailCode字段输入的值包含非数字字符？

Answer 2

设定的是string字段，输入的倒是数字，不过应该不会是非法的问题把！

Answer 3

纳闷的是我设定的是STRING，为啥他自己给我转码呢，其他字段同样输的是数字就没这个问题啊！

Answer 4

你应该是在将字符型的数值转化为int时报错的吧！你检查下后台接受到的值！

Answer 5

java.lang.NumberFormatException
把mailCode值无法转为数值，你看看你你后台mailCode字段的数据类型有没有混淆了

Answer 6

后台字段我对了，也是String类型的，所有引用和数据库的都一致！其他字段进行同样操作就没问题！

Answer 7

如果确定检查都没问题的话，那是不是有这样的情况，最开始你是int类型的，后面改为string类型，但是tomcat上部署的项目没有改过来。

Answer 8

我把work/Catalina目录下和webapps下的工程文件全删除了，重新加载进去，还是报同样的错误！

Answer 9

这个字符设定的就是STRING没有转化！其他转化的字段都能正常获取！这个字段也能获取