【JSP开发】JSP的forward标签使用

原创

光仔December 2023-03-18 10:03:06 ©著作权

文章标签 jsp jsp标签 forward带参跳转 servlet java 文章分类 Python 后端开发

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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);
  }


}