jsp自定义标签获取标签体内容输出到页面展示《三》

1.BodyTag.java

package com.zy.tag;
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.SimpleTagSupport;

public class BodyTag extends SimpleTagSupport{

    @Override
    public void doTag() throws JspException, IOException {
        //获取标签体内容对象
        JspFragment jb = this.getJspBody();
        //获取PageContext对象
        PageContext context= (PageContext) this.getJspContext();
        //获取JspWriter对象
        JspWriter out = context.getOut();
        //将标签体内容输出到指定writer对象中，循环5次
        for (int i = 0; i < 5; i++) {
            jb.invoke(out);
        }
        out.flush();
        super.doTag();
    }
}

2.bodyTag.tld

<?xml version="1.0" encoding="UTF-8"?>
<!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>1.0</jsp-version>
  <short-name>bodyTag</short-name>
  <uri>http://www.zy.bodyTag</uri>
  <tag>
    <name>body</name>
    <tag-class>com.zy.tag.BodyTag</tag-class>
    <body-content>scriptless</body-content>
  </tag>
</taglib>

3.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 
<%@taglib uri="http://www.zy.bodyTag" prefix="bodyTag" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>首页</title>
</head>
<body background="../img/body-bg.png">
    <hr/>
    <bodyTag:body>
        输出自定义标签体内容到页面demo!
    </bodyTag:body> 
</body>
</html>

4.效果图

posted @ 2018-01-26 15:53  anionic  阅读(431)  评论(0)  编辑  收藏  举报