Struts2验证比起Struts1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

  

    
     


     
    < ?xml:namespace prefix = s />< s:fielderror>< /s:fielderror>
    < /FONT>
   
    < !-- 读取显示提示信息 -->
    < TABLE>
     
      
       用户名:
      
      
       
      
     
     
      
       密码:
      
      
       < INPUT type=password name=user.password>
      
    
     
     
     
      
       确认密码:
      
      
       < INPUT type=password name=user.rePassword>
      
    
     
     


     
    
     
      
     
       年龄:
     
      
     
      
     
       < INPUT name=user.age>
     
      
     
     
     
     
     
      
     
       生日:
     
      
     
      
     
       < INPUT name=user.birthday>
     
      
     
     
     
     
     
      
     
       
     
     
     
      
     
     
     
    
     
     
   
    

2.注册成功欢迎页面welcome.jsp

congratulations!${user.userName} 

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>

    
     
   < !-- 验证字符串不能为空 -->
     
   < FIELD-VALIDATOR type="requiredstring">
     
    < !-- 去空格 -->
     
    < PARAM name="trim">true
     
    < !-- 错误提示信息 -->
     
    < MESSAGE>用户名不能为空
     
   < /FIELD-VALIDATOR>
     
  
     
   < !-- 验证字符串长度 -->
     
   < FIELD-VALIDATOR type="stringlength">
     
    < PARAM name="minLength">2< /PARAM>
     
    
     20
     
    < MESSAGE>用户名长度应在2到18个字符间
     
   
     

     


     
      
       
   < FIELD-VALIDATOR type="requiredstring">
       
    
       true
       
    < MESSAGE>密码不能为空
       
   < /FIELD-VALIDATOR>
       
  
       
   < FIELD-VALIDATOR type="stringlength">
       
    < PARAM name="minLength">6< /PARAM>
       
    
       18
       
    
       
        密码长度应在6到18个字符之间< /MESSAGE>
        
   < /FIELD-VALIDATOR>
        
< /FIELD>
       
    

     
      
       
   < FIELD-VALIDATOR type="int">
       
    < PARAM name="min">1
       
    < PARAM name="max">150
       
    < MESSAGE>年龄应在1到150之间
       
   < /FIELD-VALIDATOR>
       

       
< !-- 验证字符串为日期类型 -->
       

       
        
   < FIELD-VALIDATOR type="date">
        
    < PARAM name="min">1900-01-01
        
    < PARAM name="max">2008-10-16< /PARAM>
        
    < MESSAGE>出生日期应在1900-01-01到2008-10-16< /MESSAGE>
        
   
        
< /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>
   
    
     
      
    
      
       
       < 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

< ?XML:NAMESPACE PREFIX = [default] < web-app 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
   
      
       
    org.apache.struts2.dispatcher.ActionContextCleanUp
       
   
       

    
< filter>
   < filter-name>struts2
   
      
       
    org.apache.struts2.dispatcher.FilterDispatcher
       
   
       

    
< filter-mapping>
   < filter-name>struts-cleanup< /filter-name>
   
      
       /*
       

    
< filter-mapping>
   < filter-name>struts2< /filter-name>
   < url-pattern>/*< /url-pattern>

< 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Struts2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 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

【编辑推荐】

1. 在Eclipse中开发struts应用程序
2. 手把手教你在Eclipse中配置开发Struts
3. Eclipse下开发struts完整解决乱码问题
4. Struts相关背景介绍
5. 使用Easy Struts for Eclipse开发Struts

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