timetag.java

jsp页面的一些关键技术,里面有我上课时的很多例子,大家不妨看看.

package com.allanlxf.tag;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

public class TimeTag implements Tag
{
    protected PageContext pageContext;
    private Tag parent;
    private String author;
    
    public void setPageContext(PageContext pageContext)
    {
        this.pageContext = pageContext;
    }
    
    public int doStartTag() throws JspException
    {
        try
        {
            JspWriter out = pageContext.getOut();
            out.println("hello, " + author);
            java.util.Date now = new java.util.Date();
            out.println(" now is : " + now);
            pageContext.setAttribute("now", now);
        }catch(Exception e)
        {
            throw new JspException(e.getMessage());
        }
        
        return EVAL_BODY_INCLUDE;
    }
    
    public int doEndTag() throws JspException
    {
        return EVAL_PAGE;
    }
    
    public Tag getParent()
    {
        return parent;
    }
    
    public void setParent(Tag parent)
    {
        this.parent = parent;
    }
    
    public void release()
    {
    }
    
    public void setAuthor(String author)
    {
        this.author = author;
    }
}