Struts2 提供了两种校验方式。
使用编码方式进行校验
新建 register.jsp 页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Register</title>
</head>
<body>
<h2 style="color:blue;">用户注册</h2>
<s:actionerror cssStyle="color:red;" />
----------------------------------------------------------------------
<%--
<form action="register.action">
username: <input type="text" name="username" size="20" /><br/>
password: <input type="password" name="password" size="20" /><br/>
repassword: <input type="password" name="repassword" size="20" /><br/>
age: <input type="text" name="age" size="20" /><br/>
birthday: <input type="text" name="birthday" size="20"/><br/>
geaduation: <input type="text" name="graduation" size="20"/><br/>
<input type="submit" value="submit"/>
</form>
--%>
<s:fielderror cssStyle="color:blue;"></s:fielderror>
<s:form action="register" theme="simple">
username:<s:textfield name="username" label="username"></s:textfield><br/>
password: <s:password name="password" label="password"></s:password><br/>
repassword: <s:password name="repassword" label="repassword"></s:password><br/>
age: <s:textfield name="age" label="age"></s:textfield><br/>
birthday: <s:textfield name="birthday" label="birthday"></s:textfield><br/>
geaduation: <s:textfield name="graduation" label="graduation"></s:textfield><br/>
<s:submit value="submit"></s:submit>
</s:form>
<%--
<s:form action="register">
<s:textfield name="username" label="username"></s:textfield>
<s:password name="password" label="password"></s:password>
<s:password name="repassword" label="repassword"></s:password>
<s:textfield name="age" label="age"></s:textfield>
<s:textfield name="birthday" label="birthday"></s:textfield>
<s:textfield name="graduation" label="graduation"></s:textfield>
<s:submit value="submit"></s:submit>
</s:form>
--%>
</body>
</html>
...大约 4 分钟