自定义jstl标签用法案例

来源：互联网发布：织梦cms手机模板编辑：程序博客网时间：2024/05/17 08:17
07820170914jstl自定义标签：主要用于移除Jsp页面中的java代码1、编写一个类，继承SimpleTagSupport[类属性与配置在tld中的属性参数一致，添加set、get方法]2、重写doTage(标签的核心方法，输出标签的内容)3、编写一个tld文件(描述标签的属性[标签名、对应的类、对应的uri...])package com.tiger.tag;import java.io.IOException;import java.util.Map;import java.util.Set;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.SimpleTagSupport;/** * 遍历集合,nobody * @author tiger * @time 2017年9月13日 */public class MySelect extends SimpleTagSupport{//设置参数,与.tld文件中attribute中的name一致private Map map;private String path;public String getPath() {return path;}public void setPath(String path) {this.path = path;}public Map getMap() {return map;}public void setMap(Map map) {this.map = map;}@Overridepublic void doTag() throws JspException, IOException  {//内置一个pageContext对象，它里面是封装了9个隐式对象StringBuffer htmlBuffer=new StringBuffer();//遍历集合元素htmlBuffer.append("");getJspContext().getOut().println(htmlBuffer.toString());}}package com.tiger.tag;import java.io.IOException;import java.util.ArrayList;import java.util.Collection;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Set;import javax.servlet.jsp.JspException;import javax.servlet.jsp.JspWriter;import javax.servlet.jsp.tagext.SimpleTagSupport;/** * 遍历集合,hasbody * @author tiger * @time 2017年9月13日 */public class MySelectBody extends SimpleTagSupport{//设置参数,与.tld文件中attribute中的name一致private Map map;private String path;public String getPath() {return path;}public void setPath(String path) {this.path = path;}public Map getMap() {return map;}public void setMap(Map map) {this.map = map;}@Overridepublic void doTag() throws JspException, IOException  {JspWriter out = getJspContext().getOut();out.println("");}}JSTL 1.1 core libraryJSTL core1.1tigerhttp://www.tiger.com/tigertagtablecom.tiger.tag.MyTableemptycollectiontruetrueselectcom.tiger.tag.MySelectemptymaptruetruepathtruetrueselectbodycom.tiger.tag.MySelectBodyscriptlessmaptruetruepathtruetrue<%@page import="java.util.HashMap"%><%@page import="java.util.Map"%><%@page import="java.util.Collection"%><%@page import="java.util.Collections"%><%@page import="java.util.ArrayList"%><%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="my" uri="http://www.tiger.com/tigertag"%><%Map map = new HashMap();map.put("001", "tiger");map.put("002", "hello");map.put("003", "xixi");pageContext.setAttribute("map", map);%><%@page import="java.util.HashMap"%><%@page import="java.util.Map"%><%@page import="java.util.Collection"%><%@page import="java.util.Collections"%><%@page import="java.util.ArrayList"%><%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="my" uri="http://www.tiger.com/tigertag"%>----自定义标签库-hasbody----<%Map map = new HashMap();map.put("001", "body");map.put("002", "呵呵");map.put("003", "嘻嘻");pageContext.setAttribute("map", map);%>
阅读全文
1 0