Duplicate local variable user

严重: Servlet.service()for servlet jsp threw exception

org.apache.jasper.JasperException: Unable tocompile class for JSP:

 

An error occurred at line: 8 in the jsp file:/admin/updateUsers.jsp

Duplicate local variable user

5: <h2>

6: 鐢ㄦ埛鏇存柊

7: </h2>

8: <% Users user = (Users)request.getAttribute("user"); %>

9: <form id="form1" name="form1"method="post"

10:         action="/Data/servlet/UserServlet">

11:         <input type="hidden" name="method" value="update"/>

 

 

Stacktrace:

    atorg.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)

    atorg.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)

    atorg.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:423)

    atorg.apache.jasper.compiler.Compiler.compile(Compiler.java:317)

    atorg.apache.jasper.compiler.Compiler.compile(Compiler.java:295)

    atorg.apache.jasper.compiler.Compiler.compile(Compiler.java:282)

    atorg.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)

    atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)

    atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)

    atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)

    atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)

    atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

    atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    atorg.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)

    atorg.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)

    atorg.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)

    atorg.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)

    atzhao.ai.nan.UserServlet.edit(UserServlet.java:160)

    atzhao.ai.nan.UserServlet.doPost(UserServlet.java:45)

    atzhao.ai.nan.UserServlet.doGet(UserServlet.java:27)

    atjavax.servlet.http.HttpServlet.service(HttpServlet.java:617)

    atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)

    atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

    atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

    atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

    atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)

    atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

    atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

    atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)

    atorg.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)

    atorg.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)

    atorg.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

    atjava.lang.Thread.run(Thread.java:619)

org.apache.jasper.JasperException: Unable to compileclass for JSP:

 

 

 

原因找出来了 是因为我在当前这个jsp页面includ了另外一个jsp页面 而那个jsp页面已经定义了一个变量user故在当前页面在定义user变量会报错,所以把这个页面中的user改个名字就ok了