创建一个用于接收Ajax请求的Servlet
package com.ajaxAndJQ.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
// 这里使用了注解注册servlet 所以xml不用配置
@WebServlet("/HelloAjax")
public class HelloAjax extends HttpServlet {
// 用于接收get请求
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println(request.getParameter("username") + ":发来一条get请求");
response.setContentType("text/html;charset=utf-8");
response.getWriter().write("get请求已收到");
}
// 用于接收post请求
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println(request.getParameter("username") + ":发来post请求");
response.setContentType("text/html;charset=utf-8");
response.getWriter().write("post请求已收到");
}
}
创建一个jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<input type="button" οnclick="get()" value="点击使用Ajax发送请求" />
<input type="button" οnclick="post()" value="点击使用Ajax发送请求" />
<div id="div01"></div>
</body>
<!-- 引入jq文件 -->
<script type="text/javascript" src="js/jquery-1.11.3.min.js">
</script>
<script type="text/javascript">
function get() {
//$.get(发送的地址, 用于处理返回值的回调函数);
$.get("/ajaxAndJQ/HelloAjax?username=get", function(data) {
//将结果填入div01
$("#div01").text(data);
});
}
function post() {
//$.post(发送的地址,需要发送的json格式的数据,用于处理返回值的回调函数) ;
$.post("/ajaxAndJQ/HelloAjax", {
username: "post"
}, function(data) {
//将结果填入div01
$("#div01").text(data);
});
}
</script>
</html>
前端谷歌浏览器显示
后端接收
