一个很困惑的JSP错误实在迷惑了求有经验的帮看看分不多但一顶结贴

bladefenix 2005-12-26 11:21:34

一个简单JSP PAGE 代码如下
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
request.setCharacterEncoding("GBK");
%>
<%@ page contentType="text/html" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<html>
<head>
<TITLE>MMIS</TITLE>
</head>

<body bgcolor="white">
<H1>Welcom to MMIS</H1>
<p>
//uncredible error... almost get crazy..
<font color="red">
<c:out value='${param.errormsg}'></c:out>
</font>
//above is error
</body>
</html>

上面注释处就是出错的地方 value='${param.errormsg}' 这里调用REQUEST PARAM 出错了
换成任意常量字符串就没错.. 实在不解.. 到底哪错了..

出错代码:
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /login.jsp(19,6) According to TLD or attribute directive in tag file, attribute value does not accept any expressions
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:150)
org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:941)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:696)
org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1441)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Validator.validate(Validator.java:1475)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:214)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

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lingbo_wx 2005-12-26

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zhmain 2005-12-26

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<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>错了应该用
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

bladefenix 2005-12-26

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自己顶一下
明明用的是JSTL1.1 为什么就
According to TLD or attribute directive in tag file, attribute value does not accept any expressions
了呢?

bladefenix 2005-12-26

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谢谢楼上几位!

xicheng_my_love 2005-12-26

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看来你还没有弄懂基本的关于标签库的知识,你去看一下自己怎么写标签,你就对如何用已有的标签有一个比较清楚的了解了

bladefenix 2005-12-26

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.... 的确如小胖子所说... 改过来就OK 了...
多谢了.. 要是没有人指点自己不知道要话多少时间了..
最后请教一下为什么中间加个JSP 就OK 了呢?
URI 是不是应该指向TLD 文件???
这里的URI http://java.sun.com/jsp/jstl/core 是一个网址指的是什么呢??