Webwork验证框架(含自定义验证规则)

Action:

 

package  ch13.example1;

import  com.opensymphony.xwork.ActionSupport;
import  com.opensymphony.xwork.Validateable;

public   class  Test  extends  ActionSupport ... {



    
private User user;
    
    
    
public User getUser() ...{
        
return user;
    }

    
public void setUser(User user) ...{
        
this.user = user;
    }

    
public String execute() throws Exception ...{
        
return SUCCESS;
    }




    



}

JavaBean

 

package  ch13.example1;

public   class  User  ... {
   
private double salary;
   
private int age;
   
private String name;
public int getAge() ...{
    
return age;
}

public void setAge(int age) ...{
    
this.age = age;
}

public String getName() ...{
    
return name;
}

public void setName(String name) ...{
    
this.name = name;
}

public double getSalary() ...{
    
return salary;
}

public void setSalary(double salary) ...{
    
this.salary = salary;
}





}

 JSP:

 

<% ... @ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding
="GB18030"
%>
<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<% ... @ taglib uri="webwork" prefix="ww" %>
<% ... @ page import="java.util.*"  %>
< html >
< head >

< meta  http-equiv ="Content-Type"  content ="text/html; charset=GB18030" >
< title > Insert title here </ title >
</ head >
< body >
< ww:form  action ="testValidate" >
 
  
< ww:textfield  label ="salary"  name ="user.salary" />< br >
  
< ww:textfield  label ="name"  name ="user.name" />< br >
  
< ww:textfield  label ="age"  name ="user.age" />< br >
   
< ww:submit  value ="update user" />
</ ww:form >

</ body >
</ html >

 

准备工作已经做好了,下面我们要做的就是对name字段进行验证,

验证分两种情况
(1)不能为空,使用webwork预置验证规则
(2)输入内容必须为"gaoxiang" 这部分使用自定义规则

首先,在Test Action包内建立验证规则,命名为Test-validation.xml

其中resquiredstring规则为webwork预置,另一个是自定义规则

<? 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 ="user.name" >
  
  
   
< field-validator  type ="requiredstring" >
     
< message > name required </ message >
   
</ field-validator >

   
   
< field-validator  type ="myValidator" >
     
< message > name not equal gaoxiang </ message >
    
</ field-validator >

  
</ field >
</ validators >

在classpath下建立validation.xml

需要说明的是,webwork的jar包中已经包含了validation.xml(2.2.4版本中在xwork.jar中,叫default,xml)

我们并不需要额外建立validation.xml就可以使用这些规则,但我们自定义的规则必须建立validation.xml并在其中

定义,但如果classpath下有了我们自己建立的validation.xml,webwor预置的那些规则就失效了,所以,我们要把webowork预置的那些规则复制到我们建立的validation,xml中,代码如下:

 

<? xml version="1.0" encoding="UTF-8" ?>
< validators >
  
< validator  name ="myValidator"  class ="ch13.example1.myValidator" />
   
< validator  name ="required"  class ="com.opensymphony.xwork.validator.validators.RequiredFieldValidator"   />  
  
< validator  name ="requiredstring"  class ="com.opensymphony.xwork.validator.validators.RequiredStringValidator"   />  
  
< validator  name ="int"  class ="com.opensymphony.xwork.validator.validators.IntRangeFieldValidator"   />  
  
< validator  name ="double"  class ="com.opensymphony.xwork.validator.validators.DoubleRangeFieldValidator"   />  
  
< validator  name ="date"  class ="com.opensymphony.xwork.validator.validators.DateRangeFieldValidator"   />  
  
< validator  name ="expression"  class ="com.opensymphony.xwork.validator.validators.ExpressionValidator"   />  
  
< validator  name ="fieldexpression"  class ="com.opensymphony.xwork.validator.validators.FieldExpressionValidator"   />  
  
< validator  name ="email"  class ="com.opensymphony.xwork.validator.validators.EmailValidator"   />  
  
< validator  name ="url"  class ="com.opensymphony.xwork.validator.validators.URLValidator"   />  
  
< validator  name ="visitor"  class ="com.opensymphony.xwork.validator.validators.VisitorFieldValidator"   />  
  
< validator  name ="conversion"  class ="com.opensymphony.xwork.validator.validators.ConversionErrorFieldValidator"   />  
  
< validator  name ="stringlength"  class ="com.opensymphony.xwork.validator.validators.StringLengthFieldValidator"   />  
  
< validator  name ="regex"  class ="com.opensymphony.xwork.validator.validators.RegexFieldValidator"   />
</ validators >

验证类ch13.exmaple1.myValidator

继承FiledValidatorSupport并覆盖validate方法即可,出现错误用addFieldError设置相关错误信息,如果不进行addFieldError,则验证通过

package  ch13.example1;

import  com.opensymphony.xwork.validator.ValidationException;
import  com.opensymphony.xwork.validator.validators.FieldValidatorSupport;

public   class  myValidator  extends  FieldValidatorSupport  ... {

    
public void validate(Object obj) throws ValidationException ...{
        String name
=getFieldName();
        String value
=(String)getFieldValue(name,obj);
        
if(!value.equals("gaoxiang")&&!value.equals(""))...{
            addFieldError(name,obj);
        }


    }


}

运行页面,首先不输入name,系统会提示必须输入name required,输入非"gaoxiang",系统会提示name not equal gaoxiang



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