【JSP开发】JSP的forward标签使用

最新推荐文章于 2022-03-27 14:15:56 发布

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最新推荐文章于 2022-03-27 14:15:56 发布

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CC 4.0 BY-SA版权

文章标签： java

原文链接：https://yq.aliyun.com/articles/18873

本文详细介绍了如何在JSP中实现页面跳转功能及其带参数的使用方法，通过实例展示了如何在Servlet中接收并处理从JSP传递过来的参数。

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1.跳转功能的实现

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
    <title>My JSP 'Jsp5.jsp' starting page</title>


  </head>
  
  <body>
   <%
     pageContext.forward("/index.jsp"); 
   %>
  </body>
</html>

2.跳转的时候带参数:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head> 
    <title>My JSP 'Jsp6.jsp' starting page</title>
  </head>
  
  <body>
  
   <!-- 
   //测试时把下面的代码删除
    <jsp:forward page="/index.jsp"></jsp:forward>
    
    <jsp:include page="/public/head.jsp"></jsp:include>  //与PageContext.include()一样是动态包含 
   
   -->
   
   <jsp:forward page="/ServletDemo1">
        <jsp:param name="data" value="XXX"></jsp:param>
   </jsp:forward>
    
  </body>
</html>

ServletDemo1:

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 ServletDemo1 extends HttpServlet {


	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out=response.getWriter();
        
        String data=request.getParameter("data");
        out.write("JSP传过来的数据是：");
        out.write(data);
	}


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


}

最后在Servlet上拿到jsp文件跳转时传过来的参数。

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