String Date Calendar之间的转换

http://strongboy789.iteye.com/blog/1551959

 

1.Calendar 转化 String

Calendar calendat = Calendar.getInstance();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

String dateStr = sdf.format(calendar.getTime());

 

2.String 转化Calendar

String str="2012-5-27";

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

Date date =sdf.parse(str);

Calendar calendar = Calendar.getInstance();

calendar.setTime(date);

 

3.Date 转化String

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

String dateStr=sdf.format(new Date());

 

4.String 转化Date

String str="2012-5-27";

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

Date date= sdf.parse(str);

 

5.Date 转化Calendar

Calendar calendar = Calendar.getInstance();

calendar.setTime(new java.util.Date());

 

6.Calendar转化Date

Calendar calendar = Calendar.getInstance();

java.util.Date date =calendar.getTime();

 

7.String 转成 Timestamp

Timestamp ts = Timestamp.valueOf("2012-1-14 08:11:00");

 

8.Date 转 TimeStamp

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String time = df.format(new Date());

Timestamp ts = Timestamp.valueOf(time);

 

 

js判断大小

function validSj(){//判断是否已到开标时间
var kbsj = $('kbsj').innerText;
kbsj = kbsj.replace(/\-/g,'/');
var nowdate = new Date();//alert(kbsj);
var kbsjdate = new Date(kbsj);//alert(nowdate);alert(kbsjdate>nowdate);
if(kbsjdate!=null&&kbsjdate!='NaN'&&kbsjdate!=''&&nowdate>kbsjdate){//开标时间已过，再判断是否小于3
return true;
}else{
return false;
}
}

 oracle

select  to_char(sysdate,'yyyy-mm-dd hh24-mi-ss') from dual