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Ajax实现异步加载数据
本文实例为大家分享了Ajax实现异步加载数据的具体代码,供大家参考,具体内容如下
项目结构如下 (需要导入一个JQuery的包,配置文件web.xml和springmvc-servlet.xml,不在写了,不知道的可以看一下我其它的博客,上边都有)
异步加载数据
首先创建一个实体类
package com.zkw.pojo;import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor;@Data @AllArgsConstructor @NoArgsConstructorpublic class User { private String name; private int age; private String sex;}
然后创建一个Controller
package com.zkw.controller;import com.zkw.pojo.User;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.util.ArrayList;import java.util.List;@RestControllerpublic class AjaxController { @RequestMapping("/a2") public List<User> test2(){List<User> userList = new ArrayList<User>();userList.add(new User("七七",1,"女"));userList.add(new User("琪琪",1,"女"));userList.add(new User("琦琦",1,"女"));return userList; }}
最后创建一个jsp页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>Ajax异步数据加载</title> <script src="${pageContext.request.contextPath}/static/js/jquery-3.6.0.js"></script> <script>$(function () { $("#btn").click(function () {$.post("${pageContext.reques-t.contextPath}/a2",function (data) { var html=""; for (let i = 0; i < data.length; i++){html +="<tr>" +"<td>" + data[i].name +"</td>"+"<td>" + data[i].age +"</td>"+"<td>" + data[i].sex +"</td>"+ "</tr>" } $("#content").html(html);}) })}) </script></head><body> <input type="button" value="加载数据" id="btn"> <table><thead> <tr><td>姓名</td><td>年龄</td><td>性别</td> </tr></thead><tbody id="content"></tbody> </table></body></html>
结果如下
用户登录的异步验证
先创建一个Controller
package com.zkw.controller;import com.zkw.pojo.User;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.util.ArrayList;import java.util.List;@RestControllerpublic class AjaxController { @RequestMapping("/a3") public String test3(String username,String pwd){String msg ="";if (username != null){ if (username.equals("admin")){msg = "ok"; }else{msg = "用户名不存在"; }}if (pwd != null){ if (pwd.equals("123456")){msg = "ok"; }else{msg = "密码输入错误"; }}return msg; }}
然后创建一个jsp页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>用户登录</title> <script src="${pageContext.request.contextPath}/static/js/jquery-3.6.0.js"></script> <script> function a1() { $.post({url:"${pageContext.request.contextPath}/a3",data:{"username":$("#username").val()},success(data){ if (data.toString()==="ok"){$("#userInfo").css("color","green"); }else {$("#userInfo").css("color","red"); } $("#userInfo").html(data);} }) } function a2() { $.post({ url:"${pageContext.request.contextPath}/a3", data:{"pwd":$("#pwd").val()}, success(data){ if (data.toString()==="ok"){ $("#pwdInfo").css("color","green"); }else { $("#pwdInfo").css("color","red"); } $("#pwdInfo").html(data); } }) } </script></head><body> <p>用户名:<input type="text" id="username" οnblur="a1()"><span id="userInfo"></span> </p> <p>密码名:<input type="password" id="pwd" οnblur="a2()"><span id="pwdInfo"></span> </p></body></html>
结果如下
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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Ajax
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