request请求获取参数的实现方法(post和get两种方式)

 

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 = requesthttp://.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 names = (Iterator) request.getParameterNames();

// while(namesTT***yrZb.hasNext()){

// System.out.println(names.next());

// } 

/*

* 获取所有请求参数，封装到Map中

*/

Map map = (Map)request.getParameterMap();

for(String name:map.keySet()){

String[] values = map.get(name);

System.out.println(name+"="+Arrays.toString(values)); }