Servlet--获取http协议的请求体参数

   

    

     

      

     
     

      

       package test06_3;
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

       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 UserServlet extends HttpServlet {
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      
	
      
     
    

     

      

     
     

      
	public void doGet(HttpServletRequest request, HttpServletResponse response)
      
     
    

     

      

     
     

      
			throws ServletException, IOException {
      
     
    

     

      

     
     

      
		//设置响应的类型及编码格式
      
     
    

     

      

     
     

      

       		response.setContentType("text/html;charset=UTF-8");
      
     
    

     

      

     
     

      
		PrintWriter out = response.getWriter();
      
     
    

     

      

     
     

      
		
      
     
    

     

      

     
     

      
		//接受用户的参数，通过get方式。
      
     
    

     

      

     
     

      
		String name = request.getParameter("name");//接受用户的参数
      
     
    

     

      

     
     

      
		String sex = request.getParameter("sex");
      
     
    

     

      

     
     

      
		
      
     
    

     

      

     
     

      

       		out.print("GET方式获取你的名称是："+name+",性别是："+sex);
      
     
    

     

      

     
     

      

       	}
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      
	
      
     
    

     

      

     
     

      
	public void doPost(HttpServletRequest request, HttpServletResponse response)
      
     
    

     

      

     
     

      
			throws ServletException, IOException {
      
     
    

     

      

     
     

      

       		request.setCharacterEncoding("UTF-8"); //设置接受数据是utf-8编码
      
     
    

     

      

     
     

      

       		response.setContentType("text/html;charset=UTF-8");
      
     
    

     

      

     
     

      
		PrintWriter out = response.getWriter();
      
     
    

     

      

     
     

      
		
      
     
    

     

      

     
     

      
		//接受用户的参数，通过post方式。
      
     
    

     

      

     
     

      
		String name = request.getParameter("name");//接受用户的参数
      
     
    

     

      

     
     

      
		String sex = request.getParameter("sex");
      
     
    

     

      

     
     

      
				
      
     
    

     

      

     
     

      

       		out.print("POST方式获取你的名称是："+name+",性别是："+sex);
      
     
    

     

      

     
     

      
		
      
     
    

     

      

     
     

      

       	}
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

       }
      
     
   
  

2、web.xml配置文件

   

    

     

      

     
     

      

       <?xml version="1.0" encoding="UTF-8"?>
      
     
    

     

      

     
     

      

       <web-app version="3.0"
      
     
    

     

      

     
     

      

           xmlns="http://java.sun.com/xml/ns/javaee"
      
     
    

     

      

     
     

      

           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      
     
    

     

      

     
     

      

           xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
      
     
    

     

      

     
     

      

         <servlet>
      
     
    

     

      

     
     

      

           <description>This is the description of my J2EE component</description>
      
     
    

     

      

     
     

      

           <display-name>This is the display name of my J2EE component</display-name>
      
     
    

     

      

     
     

      

           <servlet-name>UserServlet</servlet-name>
      
     
    

     

      

     
     

      

           <servlet-class>test06_3.UserServlet</servlet-class>
      
     
    

     

      

     
     

      

         </servlet>
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

         <servlet-mapping>
      
     
    

     

      

     
     

      

           <servlet-name>UserServlet</servlet-name>
      
     
    

     

      

     
     

      

           <url-pattern>/userservlet</url-pattern>
      
     
    

     

      

     
     

      

         </servlet-mapping>
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

       </web-app>
      
     
   
  

3、配置index.jsp文件转发用户的get和post请求

   

    

     

      

     
     

      

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

     

      

     
     

      

       <%
      
     
    

     

      

     
     

      

       String path = request.getContextPath();
      
     
    

     

      

     
     

      

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

     

      

     
     

      

       %>
      
     
    

     

      

     
     

      
 
      
     
    

     

      

     
     

      

       <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
      
     
    

     

      

     
     

      

       <html>
      
     
    

     

      

     
     

      

         <head>
      
     
    

     

      

     
     

      

           <base href="<%=basePath%>">
      
     
    

     

      

     
     

      
    
      
     
    

     

      

     
     

      

           <title>My JSP 'index.jsp' starting page</title>
      
     
    

     

      

     
     

      

       	<meta http-equiv="pragma" content="no-cache">
      
     
    

     

      

     
     

      

       	<meta http-equiv="cache-control" content="no-cache">
      
     
    

     

      

     
     

      

       	<meta http-equiv="expires" content="0">    
      
     
    

     

      

     
     

      

       	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
      
     
    

     

      

     
     

      

       	<meta http-equiv="description" content="This is my page">
      
     
    

     

      

     
     

      

       	<!--
      
     
    

     

      

     
     

      

       	<link rel="stylesheet" type="text/css" href="styles.css">
      
     
    

     

      

     
     

      

       	-->
      
     
    

     

      

     
     

      

         </head>
      
     
    

     

      

     
     

      
  
      
     
    

     

      

     
     

      

         <body>
      
     
    

     

      

     
     

      

           This is my JSP page. <br>
      
     
    

     

      

     
     

      

           <a href="userservlet?name=wanghong&sex=nan">获取get请求参数</a><br/>
      
     
    

     

      

     
     

      

           <!-- form表单提交方式获取post请求参数 -->
      
     
    

     

      

     
     

      

           <form action="userservlet" method="post">
      
     
    

     

      

     
     

      

           	名字：<input type="text" name="name" value="王红"/><br/>
      
     
    

     

      

     
     

      

           	性别：<input type="text" name="sex" value="男"/><br/>
      
     
    

     

      

     
     

      

           	<input type="submit" value="提交"/>
      
     
    

     

      

     
     

      

           </form>
      
     
    

     

      

     
     

      

         </body>
      
     
    

     

      

     
     

      

       </html>
      
     
   
  

三、测试获取用户提交参数

1、浏览器发送请求  http://127.0.0.1:8080/test06_3/     在首页点击【获取Get请求参数】和 【提交】

2、分别或的get参数和post参数如下

get请求参数

post请求参数