Struts2标签（二）——subset
自定义Decider :
package com.struts2.tag.exer.web.utils;import org.apache.struts2.util.SubsetIteratorFilter.Decider;public class MyDecider implements Decider {//this way could decide whether current elements in this set could be selected into sub set .public boolean decide(Object obj) throws Exception {String str = (String)obj; //if element include "MyBatis" string , which will be selected into sub set.return str.indexOf("MyBatis")!=-1;}}<%@ page language="java" contentType="text/html;charset=UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %><html><head><title>subset</title></head><body><table border="1" width="200"><tr><td colspan="2">Subset</td></tr><tr><td>Book Name</td><td>Author</td></tr><s:subset source="{'AJAX in Action','MyBatis','JavaScrpit','SQL Server'}" start="0" count="4"><s:iterator status="st"><tr <s:if test="#st.odd">style="background-color:#bbbbbb"</s:if>><td><s:property/></td></tr></s:iterator></s:subset></table><table border="1" width="200"><tr><td colspan="2">Subset -use decider</td></tr><tr><td>Book Name</td><td>Author</td></tr><s:bean id="myDecider" name="com.struts2.tag.exer.web.utils.MyDecider"/><s:subset source="{'AJAX in Action','MyBatis','JavaScrpit','SQL Server'}" decider="#myDecider"><s:iterator status="st"><tr <s:if test="#st.odd">style="background-color:#bbbbbb"</s:if>><td><s:property/></td></tr></s:iterator></s:subset></table></body></html>