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锁定老帖子 主题：jsp 自定义标签简单应用
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发表时间：2010-01-04
最后修改：2010-01-04
后台类：
package ns.taglib; import java.io.IOException; import java.io.Writer; import java.util.ArrayList; import java.util.Iterator; import java.util.Map; import javax.servlet.jsp.JspException; import javax.servlet.jsp.tagext.SimpleTagSupport; public class arrayListShowTab extends SimpleTagSupport { // 要显示的arraylist数组 private ArrayList arr; // arraylist 中对应map要显示的字段名称 private Map map; public Map getMap() { return map; } public void setMap(Map map) { this.map = map; } public void doTag()throws JspException,IOException { try{ Writer out = getJspContext().getOut(); String tabString = "<table border='1' id='tagTab'>"; String td="<tr>"; ArrayList keyList = new ArrayList(); ArrayList valList = new ArrayList(); for(Iterator i = map.keySet().iterator();i.hasNext();){ Object key = i.next(); keyList.add(key.toString()); Object val = map.get(key); td +="<td>"+val.toString()+"</td>"; valList.add(val.toString()); } td += "</tr>"; tabString += td; for(int i=0;i<arr.size();i++){ String tdInfo =""; Map mp = (Map) arr.get(i); for(int t=0;t<keyList.size();t++){ tdInfo += "<td>"+mp.get(keyList.get(t).toString()).toString()+"</td>"; } tabString += "<tr>"+tdInfo+"</tr>"; } out.write(tabString); }catch(Exception e){ e.printStackTrace(); } } public ArrayList getArr() { return arr; } public void setArr(ArrayList arr) { this.arr = arr; } } tld文件： <?xml version="1.0" encoding="UTF-8" ?> <taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee web-jsptaglibrary_2_0.xsd" version="2.0"> <description>arrTab Demo</description> <tlib-version>1.0</tlib-version> <jsp-version>2.0</jsp-version> <short-name>TagDemo</short-name> <uri>/arrTab</uri> <tag> <!-- 定义标签名 --> <name>arrTab</name> <!-- 定义标签处理类 --> <tag-class>ns.taglib.arrayListShowTab</tag-class> <!-- 定义标签体为空 --> <body-content>empty</body-content> <!-- 配置标签属性： --> <attribute> <name>arr</name> <required>true</required> <fragment>true</fragment> </attribute> <attribute> <name>map</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> </taglib> jsp页面： <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib prefix="arrtab" uri="/arrTab"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <% ArrayList arrlist = new ArrayList(); Map map = new HashMap(); map.put("id","1");map.put("name","jim");map.put("sex","boy");map.put("phone","15130189936");map.put("mes","hello world"); arrlist.add(map); Map mapp = new HashMap(); mapp.put("mes","信息"); mapp.put("id","编号");// 编号 mapp.put("name","姓名"); mapp.put("sex","性别"); mapp.put("phone","电话"); %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'tagTs.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <arrtab:arrTab arr="<%=arrlist %>" map="<%=mapp %>" /> </body> </html> 参考资料： http://book.csdn.net/bookfiles/832/10083225007.shtml 声明：ITeye文章版权属于作者，受法律保护。没有作者书面许可不得转载。
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