struts2验证框架

Struts2验证框架验证用户注册
核心代码如下:
1.用户注册页面register.jsp

<form action="register.action" method="post">
    <I><font face="楷体_GB2312" color="#FF0000"><s:fielderror />
    </font>
    </I>
    <!-- 读取显示提示信息 -->
    <table>
     <tr>
      <td>
       用户名:
      </td>
      <td>
       <input type="text" name="user.userName">
      </td>
     </tr>
     <tr>
      <td>
       密码:
      </td>
      <td>
       <input type="password" name="user.password">
      </td>
     </tr>
     <tr>
      <td>
       确认密码:
      </td>
      <td>
       <input type="password" name="user.rePassword">
      </td>
     </tr>

     <tr>
      <td>
       年龄:
      </td>
      <td>
       <input type="text" name="user.age">
      </td>
     </tr>
     <tr>
      <td>
       生日:
      </td>
      <td>
       <input type="text" name="user.birthday">
      </td>
     </tr>
     <tr>
      <td colspan="2">
       <s:submit value="注册"></s:submit>
      </td>
     </tr>
    </table>
   </form>

2.注册成功欢迎页面welcome.jsp

congratulations!${user.userName} <br>

3.注册处理action RegisterAction

package org.kingtoon.action;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import org.kingtoon.bean.User;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends ActionSupport {


private User user;
@Override
public String execute() throws Exception {
   if(!(user.getPassword().equals(user.getRePassword()))){
      this.addFieldError("password", "请输入相同的密码");
      return "input";
   } 
   else
   { 
    HttpServletRequest request = ServletActionContext.getRequest ();
    request.setAttribute("user", user);
    return SUCCESS;
   }
  
}
public User getUser() {
   return user;
}
public void setUser(User user) {
   this.user = user;
}
}

4. 用户Bean User.java

package org.kingtoon.bean;
import java.util.Date;
public class User {
private String userName;
private String password;
private String rePassword;
private Integer age;
private Date birthday;
public Integer getAge() {
   return age;
}
public void setAge(Integer age) {
   this.age = age;
}
public Date getBirthday() {
   return birthday;
}
public void setBirthday(Date birthday) {
   this.birthday = birthday;
}
public String getPassword() {
   return password;
}
public void setPassword(String password) {
   this.password = password;
}
public String getRePassword() {
   return rePassword;
}
public void setRePassword(String rePassword) {
   this.rePassword = rePassword;
}
public String getUserName() {
   return userName;
}
public void setUserName(String userName) {
   this.userName = userName;
}

}

5.配置验证文件RegisterAction-validation.xml

<validators>
<field name="user.userName">
   <!-- 验证字符串不能为空 -->
   <field-validator type="requiredstring">
    <!-- 去空格 -->
    <param name="trim">true</param>
    <!-- 错误提示信息 -->
    <message>用户名不能为空</message>
   </field-validator>
  
   <!-- 验证字符串长度 -->
   <field-validator type="stringlength">
    <param name="minLength">2</param>
    <param name="maxLength">20</param>
    <message>用户名长度应在2到18个字符间</message>
   </field-validator>
</field>

<field name="user.password">
   <field-validator type="requiredstring">
    <param name="trim">true</param>
    <message>密码不能为空</message>
   </field-validator>
  
   <field-validator type="stringlength">
    <param name="minLength">6</param>
    <param name="maxLength">18</param>
    <message>密码长度应在6到18个字符之间</message>
   </field-validator>
</field>

<field name="user.age">
   <field-validator type="int">
    <param name="min">1</param>
    <param name="max">150</param>
    <message>年龄应在1到150之间</message>
   </field-validator>
</field>
<!-- 验证字符串为日期类型 -->
<field name="user.birthday">
   <field-validator type="date">
    <param name="min">1900-01-01</param>
    <param name="max">2008-10-16</param>
    <message>出生日期应在1900-01-01到2008-10-16</message>
   </field-validator>
</field>
</validators>

6.struts2框架默认加载的配置文件struts.xml

<struts> 
    <constant name="struts.custom.i18n.resources" value="messageResource"></constant>
    
    <package name="user" extends="struts-default">
    <action name="register" class="org.kingtoon.action.RegisterAction">
       <result name="success">/welcome.jsp</result>
       <result name="input">/register.jsp</result>
    </action>
    </package>
</struts>

7.web服务器启动时加载Struts 配置文件 web.xml

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<filter>
   <filter-name>struts-cleanup</filter-name>
   <filter-class>
    org.apache.struts2.dispatcher.ActionContextCleanUp
   </filter-class>
</filter>
<filter>
   <filter-name>struts2</filter-name>
   <filter-class>
    org.apache.struts2.dispatcher.FilterDispatcher
   </filter-class>
</filter>
<filter-mapping>
   <filter-name>struts-cleanup</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
   <filter-name>struts2</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>

<welcome-file-list>
   <welcome-file>register.jsp</welcome-file>
</welcome-file-list>
</web-app>

至此,完毕.不过需要注意:
1.配置验证xml文档的名字有讲究:格式为:Action名字(类)-validation.xml,与类在同一包中;
2.验证文档里的<field-validator type="">中的type类型要和VO中的User属性类型一致,否则会报类型转换错误