JSTL 1.2 —The absolut uri: http://java.sun.com/jsp/jstl/core cannot be resolved

            最近做的一个ATM机项目，想使用jstl标签库来做一个重定向，来保证页面的安全性

index.jsp页面如下

<%@ page language="java" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
	
	
	    
  
  
   
    
  

web.xml如下：

  
    XFireServlet
    org.codehaus.xfire.transport.http.XFireConfigurableServlet
    0
  
  
    This is the description of my J2EE component
    This is the display name of my J2EE component
    RedirectServlet
    cn.com.jlau.lj.web.RedirectServlet
  

  
    XFireServlet
    /services/*
  
  
    RedirectServlet
    /redirect
  
  
    index.jsp
  

RedirectServlet如下：

package cn.com.jlau.lj.web;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class RedirectServlet extends HttpServlet {

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		request.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(request, response);
	}

}

报错为500，

严重: Servlet.service() for servlet [jsp] in context with path [/ccb1] threw exception [The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application] with root cause
org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
	at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:56)
	at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:410)
	at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:117)
	at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:311)
	at org.apache.jasper.compiler.TagLibraryInfoImpl.(TagLibraryInfoImpl.java:152)
	at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:410)
	at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:475)
	at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1427)
	at org.apache.jasper.compiler.Parser.parse(Parser.java:138)
	at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242)
	at org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1805)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
 
  
 
  
 
  

 处理这类异常的一般方法：
 
  
1.检查servlet 版本在web.xml中 
 
  
2.检查JSTL的版本是否支持这个servlet版本 2.5 -->1.2JSTL  或者 2.4-->1.1JSTL
 
  
3.你的servlet容器必须要有相应的库，或者你必须手动添加到你的应用程序。如：JSTL 1.2 需要添加JSTL 1.2 jar 到 lib目录下
 
  
 
 
  
发现我的servlet版本过低，而我的JSTL 1.2的，因此需要手动添加jar到lib下，才能运行！