简单标签

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IterateSimpleTag.java

package com.ruanku.tag;import java.io.IOException;import java.util.Iterator;import java.util.List;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.SimpleTagSupport;public class IterateSimpleTag extends SimpleTagSupport {/** *  */private static final long serialVersionUID = 1L;private String var;private String items;public String getVar() {return var;}public void setVar(String var) {this.var = var;}public String getItems() {return items;}public void setItems(String items) {this.items = items;}@Overridepublic void doTag() throws JspException, IOException {Object value=this.getJspContext().getAttribute(items);if(value!=null&&value instanceof List){Iterator iter=((List)value).iterator();while(iter.hasNext()){this.getJspContext().setAttribute(var, iter.next());this.getJspBody().invoke(null);//响应页面}}super.doTag();}}

cc.tld

<tag><name>iterate2</name><tag-class>com.ruanku.tag.IterateSimpleTag</tag-class><body-content>scriptless</body-content><attribute><name>var</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute><attribute><name>items</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute></tag>

iterateSimpleTag.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%><%@ page import="java.util.*" %><%@ taglib prefix="cc" uri="/WEB-INF/cc.tld" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>Insert title here</title><%List people=new ArrayList();people.add("陈晨2");people.add("大爷你好2");pageContext.setAttribute("people", people);%></head><body><cc:iterate2 items="people" var="p"><h2>${p }</h2></cc:iterate2></body></html>

需要注意的地方

public class IterateSimpleTag extends SimpleTagSupport {

while(iter.hasNext()){this.getJspContext().setAttribute(var, iter.next());this.getJspBody().invoke(null);//响应页面}

<body-content>scriptless</body-content>

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