request请求获取参数(post和get两种方式)

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提交表单代码：

<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title></head><body><h1>测试请求参数</h1><!-- 注意href和action都是写的完整的名称:项目名和资源路径名 --><!-- 下面一句是get请求方式并在URL后面传值 --><a href="/Web/AAServlet?xxx=王大炮&yyy=123456">点击这里</a><hr /><form action="/Web/AAServlet" method="post">用户名:<input type="text" name="username" /><br />密    码:<input type="password" name="password" /><br />性   别:<input type="radio" name="sex" checked="checked" value="男">男 <input type="radio" name="sex" value="女">女<br />爱    好:<input type="checkbox" name="hobby" value="吃饭" />吃饭  <input type="checkbox" name="hobby" value="睡觉" />睡觉  <input type="checkbox" name="hobby" value="打代码" />打代码<br/><input type="submit" value="提交" /></form></body></html>

Servlet代码:

package request请求获取Post或者get参数;import java.io.IOException;import java.util.Arrays;import java.util.Enumeration;import java.util.Iterator;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/* * 演示request获取请求参数 */@WebServlet("/AAServlet")public class AAServlet extends HttpServlet {private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {System.out.println("get:"+request.getParameter("xxx"));System.out.println("get:"+request.getParameter("yyy"));}protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {request.setCharacterEncoding("utf-8");response.setContentType("text/html;charset=utf-8");String username = request.getParameter("username");String password = request.getParameter("password");String[] hobby = request.getParameterValues("hobby");System.out.println(username+","+password+","+Arrays.toString(hobby));/* * 测试获取所有请求参数的名称 */Enumeration<?> names2 = request.getParameterNames();while(names2.hasMoreElements()){System.out.println(names2.nextElement());}//Iterator<String> names = (Iterator<String>) request.getParameterNames();//while(names.hasNext()){//System.out.println(names.next());//}/* * 获取所有请求参数，封装到Map中 */Map<String,String[]> map = (Map<String,String[]>)request.getParameterMap();for(String name:map.keySet()){String[] values = map.get(name);System.out.println(name+"="+Arrays.toString(values));}}}

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