now.java

北大青鸟在线考试系统,包括在线考试模块,教师管理模块,系统管理模块

/*
这个示例用于向页传送当前日期信息
*/
package TestClass;

import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.Calendar;
import java.text.DecimalFormat;

public class Now extends TagSupport
{
	//当起始标记被读到时调用
	public int doStartTag() throws JspException
	{
		return this.SKIP_BODY;		//声明没有体，所以返回的SKIP_BODY
	}
	//当结束标记被读到时调用
	public int doEndTag() throws JspException
	{
		Thread t=new Thread();
		t.start();

		DecimalFormat df2 = new DecimalFormat("00");
		Calendar c = Calendar.getInstance();			//得到当前时间
		try
		{
			//pageContext是超类的一个保护属性
			JspWriter out = pageContext.getOut();		//获得向JSP的输出流
	        try 
	        {
	          Thread.sleep(1000); 
	        }   
	      	catch(InterruptedException e) {}
			out.print(c.get(Calendar.YEAR) + "-" + df2.format(c.get(Calendar.MONTH)+1) + "-" + df2.format(c.get(Calendar.DAY_OF_MONTH)) + " " + df2.format(c.get(Calendar.HOUR_OF_DAY)) + ":" + df2.format(c.get(Calendar.MINUTE)) + ":" + df2.format(c.get(Calendar.SECOND)));
		}
		catch (IOException e) {}
		return this.EVAL_PAGE;
	}
}