Request_获取请求参数通用方式演示
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Request_获取请求参数通用方式演示
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<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>注冊頁面</title>
</head>
<body><form action="/day12/requestDemo6" method="post"><input type="text" placeholder="請輸入用戶名" name="username"><br><input type="text" placeholder="請輸入密碼" name="password"><br><input type="checkbox" name="hobby" value="game">游戲<input type="checkbox" name="hobby" value="study">學習<br><input type="submit" value="注冊"></form></body>
</html>
package com.learn.web.request;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Map;
import java.util.Set;@WebServlet("/requestDemo6")
public class RequestDemo6 extends HttpServlet {protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//post 獲取請求參數//根據參數名稱獲取參數值String username = request.getParameter("username");/* System.out.println("post");System.out.println(username);*///根據參數名稱獲取參數值的數組String[] hobbies = request.getParameterValues("hobby");/*for (String hobby : hobbies) {System.out.println(hobby);}*///獲取所有請求的參數名稱Enumeration<String> parameterNames = request.getParameterNames();/*while(parameterNames.hasMoreElements()){String name = parameterNames.nextElement();System.out.println(name);String value = request.getParameter(name);System.out.println(value);System.out.println("----------------");}*/// 獲取所有參數的map集合Map<String, String[]> parameterMap = request.getParameterMap();//遍歷Set<String> keyset = parameterMap.keySet();for (String name : keyset) {//獲取鍵獲取值String[] values = parameterMap.get(name);System.out.println(name);for (String value : values) {System.out.println(value);}System.out.println("-----------------");}}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//get 獲取請求參數
/*//根據參數名稱獲取參數值String username = request.getParameter("username");System.out.println("get");System.out.println(username);*/this.doPost(request,response);}
}
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