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struts2 校验框架

阅读更多
通过继承ActionSupport重写validate()方法,实现数据校验,会存在大量的重复代码,
类似于struts1,Struts2也提供通过配置文件来进行数据校验,使用校验框架不必重复的编写校验代码.

Action及jsp可以不用改变

Java代码

package com;   
  
  
  
import java.util.Date;   
  
  
  
import com.opensymphony.xwork2.ActionSupport;   
  
  
  
public class RegistAction extends ActionSupport {   
  
  
  
    private String userName;   
  
       
  
    private String password;   
  
       
  
    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 getUserName() {   
  
        return userName;   
  
    }   
  
  
  
    public void setUserName(String userName) {   
  
        this.userName = userName;   
  
    }   
  
  
  
    @Override  
  
    public String execute() throws Exception {   
  
        return SUCCESS;   
  
    }   
  
}  

package com;



import java.util.Date;



import com.opensymphony.xwork2.ActionSupport;



public class RegistAction extends ActionSupport {



	private String userName;

	

	private String password;

	

	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 getUserName() {

		return userName;

	}



	public void setUserName(String userName) {

		this.userName = userName;

	}



	@Override

	public String execute() throws Exception {

		return SUCCESS;

	}

}



Struts.xml

Xml代码
<?xml version="1.0" encoding="UTF-8" ?>  
  
<!DOCTYPE struts PUBLIC   
  
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"   
  
    "http://struts.apache.org/dtds/struts-2.0.dtd">  
  
  
  
<struts>     
  
    <constant name="struts.custom.i18n.resources" value="messageResource"></constant>  
  
       
  
    <package name="user" extends="struts-default">  
  
        <action name="regist" class="com.RegistAction">  
  
            <result name="success">/welcome.jsp</result>  
  
            <result name="input">/regist.jsp</result>  
  
        </action>  
  
    </package>  
  
</struts>  

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">



<struts>	

    <constant name="struts.custom.i18n.resources" value="messageResource"></constant>

    

    <package name="user" extends="struts-default">

    	<action name="regist" class="com.RegistAction">

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

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

    	</action>

    </package>

</struts>



jsp

Html代码
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 
 
<%@taglib prefix="s" uri ="/struts-tags"%>   
 
<html> 
 
  <body> 
 
    <form action="regist.action" method="post"> 
 
        <s:fielderror></s:fielderror> 
 
        <table> 
 
            <tr> 
 
                <td>userName:</td> 
 
                <td> 
 
                    <input type="text" name="userName"> 
 
                </td> 
 
            </tr> 
 
            <tr> 
 
                <td>password:</td> 
 
                <td> 
 
                    <input type="text" name="password"> 
 
                </td> 
 
            </tr> 
 
              
 
            <tr> 
 
                <td>age:</td> 
 
                <td> 
 
                    <input type="text" name="age"> 
 
                </td> 
 
            </tr> 
 
            <tr> 
 
                <td>birthday:</td> 
 
                <td> 
 
                    <input type="text" name="birthday"> 
 
                </td> 
 
            </tr> 
 
            <tr> 
 
                <td colspan="2"> 
 
                    <s:submit value="注册"></s:submit> 
 
                </td> 
 
            </tr> 
 
    </form> 
 
  </body> 
 
</html> 

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

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

<html>

  <body>

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

  <s:fielderror></s:fielderror>

  <table>

  <tr>

  <td>userName:</td>

  <td>

  <input type="text" name="userName">

  </td>

  </tr>

  <tr>

  <td>password:</td>

  <td>

  <input type="text" name="password">

  </td>

  </tr>

 

  <tr>

  <td>age:</td>

  <td>

  <input type="text" name="age">

  </td>

  </tr>

  <tr>

  <td>birthday:</td>

  <td>

  <input type="text" name="birthday">

  </td>

  </tr>

  <tr>

  <td colspan="2">

  <s:submit value="注册"></s:submit>

  </td>

  </tr>

   </form>

  </body>

</html>


添加验证文件
在RegistAction.java同目录下添加文件名为RegistAction-validation.xml(action名-validation.xml)

Xml代码
<?xml version="1.0" encoding="UTF-8"?> 
 
<!DOCTYPE validators PUBLIC   
 
          "-//OpenSymphony Group//XWork Validator 1.0//EN"   
 
          "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"> 
 
<validators> 
 
    <field name="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>userName is required</message> 
 
        </field-validator> 
 
          
 
        <!-- 验证字符串长度 --> 
 
        <field-validator type="stringlength"> 
 
            <param name="minLength">5</param> 
 
            <param name="maxLength">16</param> 
 
            <message>userName should be between ${minLength} and ${maxLength}</message> 
 
        </field-validator> 
 
    </field> 
 
      
 
    <field name="password"> 
 
        <field-validator type="requiredstring"> 
 
            <param name="trim">true</param> 
 
            <message>password is required</message> 
 
        </field-validator> 
 
          
 
        <field-validator type="stringlength"> 
 
            <param name="minLength">5</param> 
 
            <param name="maxLength">16</param> 
 
            <message>password should be between ${minLength} and ${maxLength}</message> 
 
        </field-validator> 
 
    </field> 
 
      
 
    <!-- 验证字符串为数字 --> 
 
    <field name="age"> 
 
        <field-validator type="int"> 
 
            <param name="min">1</param> 
 
            <param name="max">150</param> 
 
            <message>age should be between ${min} and ${max}</message> 
 
        </field-validator> 
 
    </field> 
 
      
 
    <!-- 验证字符串为日期类型 --> 
 
    <field name="birthday"> 
 
        <field-validator type="date"> 
 
            <param name="min">1888-01-01</param> 
 
            <param name="max">2008-01-01</param> 
 
            <message>birthday should be between ${min} and ${max}</message> 
 
        </field-validator> 
 
    </field> 
 
</validators> 

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

<!DOCTYPE validators PUBLIC

          "-//OpenSymphony Group//XWork Validator 1.0//EN"

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

<validators>

<field name="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>userName is required</message>

</field-validator>



<!-- 验证字符串长度 -->

<field-validator type="stringlength">

<param name="minLength">5</param>

<param name="maxLength">16</param>

<message>userName should be between ${minLength} and ${maxLength}</message>

</field-validator>

</field>



<field name="password">

<field-validator type="requiredstring">

<param name="trim">true</param>

<message>password is required</message>

</field-validator>



<field-validator type="stringlength">

<param name="minLength">5</param>

<param name="maxLength">16</param>

<message>password should be between ${minLength} and ${maxLength}</message>

</field-validator>

</field>



<!-- 验证字符串为数字 -->

<field name="age">

<field-validator type="int">

<param name="min">1</param>

<param name="max">150</param>

<message>age should be between ${min} and ${max}</message>

</field-validator>

</field>



<!-- 验证字符串为日期类型 -->

<field name="birthday">

<field-validator type="date">

<param name="min">1888-01-01</param>

<param name="max">2008-01-01</param>

<message>birthday should be between ${min} and ${max}</message>

</field-validator>

</field>

</validators>

Struts 2.0已经实现很多常用的校验了,在jar的default.xml中的注册的

Xml代码
<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 ="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> 

<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 ="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>

<message>提示信息也可以国际化,<message key=””>就可以显示资源文件里的key对应的value了


当一个Action中有多个业务方法时,每个业务方法都会使用这种验证,显然是不好的.例如Action中有方法public String regist(),我们可以为regist()专门定义一个配置文件,文件名称为RegistAction-regist-validation.xml(Action名称-方法名- validation.xml)

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