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使用基于XML配置方式实现输入校验时，action也要继承ActionSupport,并且提供校验文件，校验文件和action类放在同一个包下，文件的取名格式为:ActionClassName-validate.xml,其中ActionClassName为简单类名，-validate为固定写法。输入页面index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>输入校验</title>
</head>
<body>
<s:fielderror/>
<form action="${pageContext.request.contextPath}/control/manage_save.action" method="post">
管理用户名:<input type="text" name="username" />不能为空<br>
手机号码:<input type="text" name="mobilephone" /> 不能为空，并且要符合手机号码格式1,3/5/8,后面9位数字<br>
<input type="submit" value="提交" />
</form>
</body>
</html>
package struts2.validate.action;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class PersonAction extends ActionSupport{
private String username;
private String mobilephone;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getMobilephone() {
return mobilephone;
}
public void setMobilephone(String mobilephone) {
this.mobilephone = mobilephone;
}
public String update() {
ActionContext.getContext().put("message", "更新成功!");
return "message";
}
public String save() {
ActionContext.getContext().put("message", "保存成功");
return "message";
}
}
校验文件PersonAction-validation.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.3//EN"
"http://www.opensymphony.com/xwork/xwork-validator-1.0.3.dtd">
<validators>
<field name="username">
<field-validator type="requiredstring">
<param name="trim">true</param>
<message>用户名不能为空!</message>
</field-validator>
</field>
<field name="mobilephone">
<field-validator type="requiredstring">
<param name="trim">true</param>
<message>手机号码不能为空!</message>
</field-validator>
<field-validator type="regex">
<param name="expression"><![CDATA[^1[358]\d{9}$]]></param>
<message>手机号码格式不正确!</message>
</field-validator>
</field>
</validators> struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="csdn" namespace="/control" extends="struts-default">
<action name="manage_*" class="struts2.validate.action.PersonAction" method="{1}">
<result name="message">/WEB-INF/page/message.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
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原文地址：http://blog.csdn.net/lindonglian/article/details/46585415
