struts2 的验证框架

public class User {

   private Integer id;

   private String name;

   private String pwd;

   getter();

   setter();

}

和此类(User) 放在同一个目录下User-userLoginContext-validation.xml这个文件！

User-userLoginContext-validation.xml如下：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE validators PUBLIC 

"-//OpenSymphony Group//XWork Validator 1.0.2//EN" 

   "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

<validators>

<field name="name">

   <field-validator type="requiredstring" short-circuit="true">

            <message>姓名是必填的</message>

</field-validator>

<field-validator type="regex">

<param name="expression"><![CDATA[(^[a-zA-Z_]/w{3,9}$)]]></param>

            <message>姓名不合法</message>

</field-validator>

</field>

<field name="pwd">

   <field-validator type="requiredstring" short-circuit="true">

            <message>密码是必填的</message>

</field-validator>

</field>

</validators>

action 如下

public class UserAction extends ActionSupport {

private static final long serialVersionUID = -2554018432709689579L;

private User user; //自定义类型Field

public String login() throws Exception{

return SUCCESS;

}

}

<package name="my" extends="struts-default" namespace="/">

<action name="user_*" class="com.liuc.web.action.UserAction" method="{1}">

<result name="success">/info.jsp</result>

<result name="input">/user_{1}.jsp</result>

</action>

</package>

页面：

<div style="color:red"><s:fielderror/></div>

<form action="user_login.action" method="post">

<table>

<tr>

<td>登录名</td>

<td><input type="text" name="user.name" value="${param['user.name']}"/></td>

</tr>

<tr>

<td>密码</td>

<td><input type="password" name="user.pwd"/></td>

</tr>

<tr><td colspan="2"><input type="submit" value=" 提交 "/></td></tr>

</table>

</form>