hellotag.java

《J2EE企业级应用开发》一书的配套源代码

package com.j2eeapp.ch14.composite;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.Hashtable;
import java.io.Writer;
import java.io.IOException;
import java.util.Date;       
public class HelloTag extends TagSupport
{
    public int doStartTag() throws JspTagException {
	return EVAL_BODY_INCLUDE;
    }

	public int doEndTag()throws JspTagException
	{
		String dateString =new Date().toString();
		try
		{
			pageContext.getOut().write("这里是tablig的内容.<br/>");
			pageContext.getOut().write("My name is"+getClass().getName()+"and it's "+dateString+"<p/>");
		}
		catch(IOException ex)
		{
			throw new JspTagException("Fatal error:hello tag conld not write to JSP out");
		}
		return EVAL_PAGE;
	}
}