Ajax实现异步加载数据
作者:起名好难呀!
这篇文章主要为大家详细介绍了Ajax实现异步加载数据,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
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 @NoArgsConstructor public 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; @RestController public 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>" } $("#content").html(html); }) }) }) </script> </head> <body> <input type="button" value="加载数据" id="btn"> <table> <thead> <tr> <td>姓名</td> <td>年龄</td> <td>性别</td> </tr> </thead> <tbody id="content"></tbody> </table> </body> </html>
结果如下
用户登录的异步验证
先创建一个Controller
package com.zkw.controller; import com.zkw.pojo.User; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.ArrayList; import java.util.List; @RestController public class AjaxController { @RequestMapping("/a3") public String test3(String username,String pwd){ String msg =""; if (username != null){ if (username.equals("admin")){ msg = "ok"; }else{ msg = "用户名不存在"; } } if (pwd != null){ if (pwd.equals("123456")){ msg = "ok"; }else{ msg = "密码输入错误"; } } return msg; } }
然后创建一个jsp页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>用户登录</title> <script src="${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脚本之家。