跳过struts2环境搭建部分，或者可以看我的博客(http://www.cnblogs.com/zhangky/p/8436472.html)，里面有写，很详细。
需要导入的jar包（struts官网有，自己下）
一、java类
private String username; private String pwd; private Map<String, Object> result; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } public Map<String, Object> getResult() { return result; } public void setResult(Map<String, Object> result) { this.result = result; } public String login() { result = new HashMap<String , Object>(); if(username.equals("z") && pwd.equals("123")) { result.put("success", true); result.put("username", username); return "success"; }else { result.put("success", false); return "success"; } }
二、html页面
<html> <head> <meta charset="UTF-8"> <title>登录</title> </head> <body> <div id="tips"></div> <input type="text" id="username"/> <input type="password" id="pwd"/> <button onclick="login()">登录</button> </body> <script src="jquery.min.js"></script> <script> function login(){ const username = document.getElementById("username").value; const pwd = document.getElementById("pwd").value; $.ajax({ type:"POST", url:"login", data:{ "username":username, "pwd":pwd }, dataType:"json", success:function(data){ let tips = document.getElementById("tips"); if(data.success == true){ window.location.href = "welcome.html?username=" + data.username }else{ tips.innerHTML = "用户名或者密码错误"; } }, error:function(error){ } }) } </script> </html>
三、struts.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <package name="default" namespace="/" extends="json-default,struts-default"> <action name="login" class="day20.LoginAction" method="login" > <!--result默认name是success可不写，由于返回的是json格式数据,因此type必须是json --> <result type="json"> <!--param 的 name固定写，result就是java类要返回的数据变量 --> <param name="root">result</param> </result> </action> </package> </struts>