Struts2验证框架验证用户注册

Struts2比起Struts1的验证框架来,好用多了,使程序更加清晰易读,充分利用了配置文件的作用,也算是解耦的表现吧.

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-validation.xml;

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;

3.struts2提供的几个框架验证的用法:

<validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/> 
    <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/> 
    <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/> 
    <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/> 
    <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/> 
    <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/> 
    <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/> 
    <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/> 
    <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/> 
    <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/> 
    <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/> 
    <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/> 
    <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>