使用JSTL开发jsp自定义标签开发---迭代标签

<? xml version="1.0" encoding="ISO-8859-1"  ?>
<! DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd" >
< taglib >
   < tlib-version > 1.0 </ tlib-version >
   < jsp-version > 1.2 </ jsp-version >
   < short-name > book </ short-name >
   < uri > http://jstlbook.com/tld/weekday.tld </ uri >
< tag >
   < name > if </ name >
   < tag-class > ttt.ConditionTest </ tag-class >
   < attribute >
     < name > items </ name >
    </ attribute >
    < attribute >
      < name > var </ name >
    </ attribute >
    < attribute >
      < name > varStatus </ name >
     </ attribute >
</ tag >
</ taglib >

package  ttt;
import  javax.servlet.jsp.JspTagException;
import  javax.servlet.jsp.jstl.core.LoopTagSupport;


public   class  LoopTagTest  extends  LoopTagSupport  ... {
     private  String items;
     private   int  i = 0 ;
     public  String getItems()  ... {
         return  items;
    }

     public   void  setItems(String items)  ... {
         this .items  =  items;
    }

     protected   boolean  hasNext()  throws  JspTagException  ... {
         if (i == 0 )
         ... {
             return   true ;
        } else ... {
             return   false ;
        }
    }

     protected  Object next()  throws  JspTagException  ... {
        i = 1 ;
         return   this .getItems();
    }

     protected   void  prepare()  throws  JspTagException  ... {
         //  TODO Auto-generated method stub
        
    }

     public   void  setVarStatus(String arg0)  ... {
         super .setVarStatus(arg0);
    }

    
   
}

<% ... @ taglib prefix = " cc "  uri = " http://jstlbook.com/tld/weekday.tld "   %>
<% ... @ taglib prefix = " c "  uri = " http://java.sun.com/jsp/jstl/core "   %>

< html >
< head >

< title > Currency Formatting </ title >
</ head >
< body >
< cc:if  items ="a:b:c:d"  var ="line"  varStatus ="s" >
   < c:out  value ="${s.first}" />< br >
   < c:forTokens  items ="${line}"  delims =":"  var ="field" >
       < c:out  value ="${field}" />< br >
   </ c:forTokens >
</ cc:if >
</ body >
</ html >