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Struts2中使用validation框架验证数据


Struts2中使用validation框架验证数据

Struts2提供了validation框架,可以使用该框架进行数据验证,和Struts1.x相同,也是通过xml文件的形式进行配置.

需要commons-validator.jar支持.







服务器端验证:

1. 创建action----ValidateAction.java



package com.validation.action; 



import com.opensymphony.xwork2.ActionSupport; 



public class ValidateAction extends ActionSupport { 


 private String name; //必须输入 

 private int age; //必须介于12-25之间 


 public String getName() { 

 return name; 

 } 

 public void setName(String name) { 

 this.name = name; 

 } 

 public int getAge() { 

 return age; 

 } 

 public void setAge(int age) { 

 this.age = age; 

 } 

}









2.配置struts.xml文件

<struts> 

 <constant name="struts.enable.DynamicMethodInvocation" value="false" /> 


 <constant name="struts.devMode" value="true" /> 




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


 <default-action-ref name="index" /> 


 <action name="Validate" class="com.validation.action.ValidateAction"> 


 <!-- 注意:如果使用了验证框架,就必须有一个name为input的返回结果 --> 

 <result name="input">/jsp/user_info.jsp</result> 


 <result>/jsp/user_info.jsp</result> 

 </action> 

 </package> 

</struts>










3.编写验证规则配置文件

这是一个基于XML的配置文件,和struts1.x中的validator框架的验证规则配置文件类似,但一般放到和要验证的.class文件在同一目录下,而且配置文件名必须使用如下两个规则中的一个来命名:

<ActionClassName>-validation.xml 


 <ActionClassName>-<ActionAliasName>-validation.xml



其中<ActionAliasName>就算struts.xml文件中的<action>的name属性,这里用第一种命名规则,所以文件名是ValidateAction-validation.xml。内容如下:

<!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"> 


 <message>请输入姓名</message> 

 </field-validator> 

 </field> 

 <field name="age"> 


 <field-validator type="int"> 


 <param name="min">12</param> 


 <param name="max">25</param> 


 <message>年龄必须介于12-25之间</message> 

 </field-validator> 

 </field> 

</validators>




其他验证规则(type属性的取值)如下:

<validators> <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="long" class="com.opensymphony.xwork2.validator.validators.LongRangeFieldValidator"/> <validator name="short" class="com.opensymphony.xwork2.validator.validators.ShortRangeFieldValidator"/> <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"/></validators>





4.jsp页面----user_info.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 


<%@ taglib prefix="s" uri="/struts-tags"%> 




<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 


<html> 

 <head> 

 <title>ValidationTest</title> 

 <link rel="stylesheet" href="../style.css" type="text/css"></link> 


 </head> 



 <body> 


 <s:form action="Validate"> 


 <s:textfield name="name" label="姓名" /> 


 <br /> 


 <s:textfield name="age" label="年龄" /> 


 <br /> 


 <s:submit /> 


 </s:form> 

 </body> 

</html>



访问如下路径,点击提交



触发验证效果....









客户端验证:只需要在form中加入validate属性,值为true即可.



<s:form action="Validate" validate="true"> 


 ...... 


</s:form>

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