JSP自定义标签_修改标签体内容小写改为大写

什么也不说,直接上代码:

package cn.itcast.web.tag;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyTag;
import javax.servlet.jsp.tagext.BodyTagSupport;
import javax.servlet.jsp.tagext.Tag;

//修改标签体
public class TagDemo4 extends BodyTagSupport {

    //bodycontent
    @Override
    public int doStartTag() throws JspException {
        return BodyTag.EVAL_BODY_BUFFERED;
    }
    
    @Override
    public int doEndTag() throws JspException {
        
        //拿到标签体
        String content = this.getBodyContent().getString();
        
        String result = content.toUpperCase();
        
        try {
            this.pageContext.getOut().write(result);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        
        return Tag.EVAL_PAGE;
    }

    

    
    
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/itcast" prefix="itcast" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP '5.jsp' starting page</title>
  </head>
  
  <body>
    
    <itcast:demo4>
        xxx
    </itcast:demo4>
  </body>
</html>
<tag>
        <name>demo4</name>
        <tag-class>cn.itcast.web.tag.TagDemo4</tag-class>
        <body-content>JSP</body-content>
</tag>

 

posted @ 2013-06-20 15:25  亂舞春秋  阅读(426)  评论(0)  编辑  收藏  举报