JQuery异步请求之$.ajax()

时间 2021-08-15

标签 html java jquery ajax 异步 jsp ide 函数 this 栏目 JQuery 繁體版

原文原文链接

AJAX各类实现方式html

JQuery异步请求之$.ajax(）java

GET请求jquery

POST请求ajax

AJAX各类实现方式

JQuery异步请求之$.ajax()

GET请求

例子：单击某个按钮，异步请求servlet,而后把响应内容返回给div异步

jsp代码jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>js原生异步</title>
    <script src="js/jquery-3.3.1.min.js"></script>
    <style>
        input{
            width:300px;
            height: 50px;
            background-color:burlywood ;
        }
        div{
            width:300px;
            height: 200px;
            background-color: pink;
        }
    </style>
    <script>
        function myClick() {
            $.ajax({
                url:"demo1" ,
                type:"GET",
                data:{
                   "name":"林不渣",
                    "age":27,
                    "remarks":"没有女友"
                },
                success:function(data){
                    $("#div").html(data)
                }
            })
        }
    </script>
</head>
<body>
    <input type="button" value="单击我触发请求" onclick="myClick();" > <br><br><br>
    <div id="div">

    </div>
</body>
</html>

servlet的demo1代码ide

package com.lingaolu.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

/**
 * @author 林高禄
 * @create 2020-08-07-14:58
 */
@WebServlet("/demo1")
public class Demo1 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
        PrintWriter writer =  response.getWriter();
        Map<String, String[]> parameterMap = request.getParameterMap();
        for(String[] sArr:parameterMap.values()){
            for(String s:sArr){
                writer.write("<h1>"+s+"</h1>");
            }
        }
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

启动访问，单击按钮前函数

单击按钮后ui

POST请求

例子：单击某个按钮，异步请求servlet,而后把响应内容返回给divthis

jsp代码

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>js原生异步</title>
    <script src="js/jquery-3.3.1.min.js"></script>
    <style>
        input{
            width:300px;
            height: 50px;
            background-color:burlywood ;
        }
        div{
            width:300px;
            height: 100px;
            background-color: pink;
        }
    </style>
    <script>
        function myClick() {
            $.ajax({
                url:"demo1" ,
                type:"POST",
                data:{
                   "name":"林大帅",
                    "age":27
                },
                success:function(data){
                    $("#div").html(data)
                }
            })
        }
    </script>
</head>
<body>
    <input type="button" value="单击我触发请求" onclick="myClick();" > <br><br><br>
    <div id="div">

    </div>
</body>
</html>

servlet的demo1代码

package com.lingaolu.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * @author 林高禄
 * @create 2020-08-07-14:58
 */
@WebServlet("/demo1")
public class Demo1 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String name = request.getParameter("name");
        String age = request.getParameter("age");
        response.setContentType("text/html;charset=utf-8");
        PrintWriter writer =  response.getWriter();
        writer.write("<h1>"+name+"</h1>");
        writer.write("<h1>"+age+"</h1>");

    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

启动访问，单击按钮前

单击按钮后

固然还有不少参数以及回调函数，好比请求出错回调等，参考APIhttps://jquery.cuishifeng.cn/jQuery.Ajax.html