UEP-时间

时间戳转化为Date（or  String）
	  SimpleDateFormat format = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );
	  Long time=new Long(445555555);
	  String d = format.format(time);
	  Date date=format.parse(d);
          System.out.println("Format To String(Date):"+d);
	  System.out.println("Format To Date:"+date);

	  运行结果：
		Format To String(Date):1970-01-06 11:45:55
		Format To Date:Tue Jan 06 11:45:55 CST 1970
Date（or String）转化为时间戳
       SimpleDateFormat format = new SimpleDateFormat( " yyyy-MM-dd HH:mm:ss " );
       String time=" 1970-01-06 11:45:55 ";//注：改正后这里前后也加了空格
       Date date = format.parse(time);
       System.out.print("Format To times:"+date.getTime());

	运行结果：
		Format To times:445555000

获取当前时间
1.通过Date类来获取时间 (常用)
   SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH：mm：ss：SSS")；
   String str=sdf.format(new Date());
   System.out.println("当前时间是："+str);

2.通过System类中的currentTimeMillis方法来获取当前时间
	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss：SSS")；
	String str=sdf.format(System.currentTimeMillis());
	System.out.println("当前时间是："+str);

3.通过Calendar类来获取当前时间
       Calendar c = Calendar.getInstance();
	   int year = c.get(Calendar.YEAR);
	   int month = c.get(Calendar.MONTH)+1;
	   int date = c.get(Calendar.DATE);
	   int hour = c.get(Calendar.HOUR_OF_DAY);
	   int minute = c.get(Calendar.MINUTE);
	   int second = c.get(Calendar.SECOND);
	   System.out.println(year + "-" + month + "-" + date + " " +hour + ":" +minute + ":" + second);
（注意：月份从0开始所以要+1）
4. LocalDateTime类来获取当前时间
          LocalDateTime dt = LocalDateTime.now();
		  int year = dt.getYear();
		  int month = dt.getMonthValue();
		  int date =dt.getDayOfMonth();
		  int hour = dt.getHour();
		  int minute = dt.getMinute();
		  int second = dt.getSecond();
		  System.out.println(year + "/" + month + "/" + date + " " +hour + ":" +minute + ":" + second);

例子：
	public class Test {
	public static void main(String[] args) throws ParseException {
		//获取当前时间
		   SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH：mm：ss：SSS");
				   String str=sdf.format(new Date());
				   System.out.println("当前时间是："+str);
		//将Date转换成时间戳
				   Date date = sdf.parse(str);
				   System.out.print("Format To times:"+date.getTime());
		}
	}
项目中时间过滤：
    //时间过滤
		String opTime1 = this.getProperty("opTime1");//开始时间
		String opTime2 = this.getProperty("opTime2");//结束时间
		if(opTime1!=null&&!"".equals(opTime1)){
			params.addParam("fillDate",Timestamp.valueOf(opTime1),QueryParam.RELATION_GE);
		}
		if(opTime2!=null&&!"".equals(opTime2)){
			Timestamp endDate = CommonUtil.addDay(Timestamp.valueOf(opTime2), 1);
			params.addParam("fillDate",endDate,QueryParam.RELATION_LE);
		}
   //时间排序
		SortParamList sortParamList =new SortParamList();
		sortParamList.addParam("fillDate", SortParam.SORT_TYPE_DESCENDING);
   //Jsp
		<td width="60" align="right">会议时间</td>
		<td width="180" align="left"><hy:date id="wzModel" upload="true"  cssStyle="width:100%;height:18px"  editor="date"/></td>
		<td width="40" align="right">到</td>
		<td align="left" width="15%"><hy:date id="_fillDate2" editor="date" cssStyle="width:100%"upload="true" />
	　　　　 知识点：editor 日期格式：month—年月,date--年月日,datetime-年月日时分秒，默认为date