新手学习mvc遇到的简单有关问题,请帮忙指教-
日期：2014-05-18 浏览次数：20749 次
新手学习mvc遇到的简单问题,请帮忙指教--在线等啊
1,model2hello.jsp
<%@ page contentType= "text/html;charset=GB2312 " %>
<%@ taglib prefix= "c " uri= "http://java.sun.com/jsp/jstl/core " %>
<html>
<head>
<title> CH18 - Model2Hello.jsp </title>
</head>
<body>
<h2> Model 2 范例 - Hello World </h2>
The Message is : <font color= "red "> ${requestScope.message} </font>
</body>
</html>
======================================================
2,model2hello.java
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Model2Hello extends HttpServlet {
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType( "text/html ");
String Message = "Hello World ";
String jsp = "/CH18/Model2Hello.jsp ";
request.setAttribute( "message ", Message);
RequestDispatcher rd = getServletContext().getRequestDispatcher(jsp);
rd.forward(request, response);
}
public void destroy() {
}
}
运行时遇到问题:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
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
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:50)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:411)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:118)
org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:316)
org.apache.jasper.compiler.TagLibraryInfoImpl. <init> (TagLibraryInfoImpl.java:147)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:418)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
org.apache.jasper.compiler.Parser.parse(Parser.java:126)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
org.apache.jasper.compiler.Co
1,model2hello.jsp
<%@ page contentType= "text/html;charset=GB2312 " %>
<%@ taglib prefix= "c " uri= "http://java.sun.com/jsp/jstl/core " %>
<html>
<head>
<title> CH18 - Model2Hello.jsp </title>
</head>
<body>
<h2> Model 2 范例 - Hello World </h2>
The Message is : <font color= "red "> ${requestScope.message} </font>
</body>
</html>
======================================================
2,model2hello.java
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Model2Hello extends HttpServlet {
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType( "text/html ");
String Message = "Hello World ";
String jsp = "/CH18/Model2Hello.jsp ";
request.setAttribute( "message ", Message);
RequestDispatcher rd = getServletContext().getRequestDispatcher(jsp);
rd.forward(request, response);
}
public void destroy() {
}
}
运行时遇到问题:
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
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
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:50)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:411)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:118)
org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:316)
org.apache.jasper.compiler.TagLibraryInfoImpl. <init> (TagLibraryInfoImpl.java:147)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:418)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
org.apache.jasper.compiler.Parser.parse(Parser.java:126)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
org.apache.jasper.compiler.Co
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