Timestamp 的使用
java.sql.Timestamp的使用:
1、把String类型转换成Timestamp类型
String datestr = "2015-07-08 11:32:21.451";
Timestamp ts = Timestamp.valueOf(datestr);
System.out.println(ts);
打印出:2015-07-08 11:32:21.451
把Timestamp类型转换成String类型
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Timestamp nowdate = new Timestamp(System.currentTimeMillis());
String datestr = sdf.format(nowdate);
System.out.println(datestr);
打印出:2015-07-08 11:32:21.45
2、获取当前时间
a、
Timestamp nowdate1 =new Timestamp(System.currentTimeMillis());
System.out.println("System.currentTimeMillis():" + nowdate1);
打印出:System.currentTimeMillis():2015-07-08 11:32:21.453
b、
Timestamp nowdate2 = new Timestamp(date.getTime());
System.out.println("new Date()" + nowdate2);
打印出:new date():2015-07-08 11:32:21.453
注:String的类型必须形如: yyyy-mm-dd hh:mm:ss[.f...] 这样的格式,中括号表示可选
实例:
import java.sql.Timestamp; import java.text.SimpleDateFormat;
public class TimestampTest {
public static void main(String[] args) {
//TimeStamp转换成String
Timestamp ts = new Timestamp(System.currentTimeMillis());
String tsStr = "";
String tsStr2= "";
String tsStr3="2014-07-08 21:17:58";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
try{
//方法一,优势在于可以灵活的设置字符串的形式
tsStr = sdf.format(ts);
System.out.println(tsStr);
//方法二
tsStr2 =ts.toString();
System.out.println(tsStr2);
//方法三
Timestamp s =Timestamp.valueOf(tsStr3);
System.out.println(s);
}catch(Exception e )
{ e.printStackTrace();
} }
打印出:
2015/07/08 21:21:56
2015-07-08 21:21:56.111
2014-07-08 21:17:58.0
}