timetag.java

张新曼 精通JSP Web 开发技术与典型应用 随书光盘源码

package ch10;
import java.text.SimpleDateFormat;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;



public class TimeTag extends TagSupport {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	String format="HH:mm:ss";
	public void setFormat(String newFormat){
		format =newFormat;
	}
	public int doEndTag() throws JspException{
		SimpleDateFormat sdf;
		sdf= new SimpleDateFormat(format);
		String time =sdf.format(new java.util.Date());
		try{
			pageContext.getOut().print(time);
		}
		catch(Exception e){
		throw new JspException(e.toString());
		}
		return EVAL_PAGE;
	}
}