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Ajax实现异步加载数据

【字号: 日期:2022-06-12 10:50:48浏览:28作者:猪猪

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。

标签: Ajax