java Timestamp、Date和String之间的相互转化

String dateStr = "2015-12-7 00:00:00";

Date date = new Date();

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

date = sdf.parse(dateStr);

Date date = new Date();

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

String dateStr = sdf.format(date);

String tsStr = "2015-12-7 00:00:00";

Timestamp ts = new Timestamp(System.currentTimeMillis());

 ts = Timestamp.valueOf(tsStr);

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

Timestamp ts = new Timestamp(System.currentTimeMillis());         

String tsStr = ""; 

tsStr = sdf.format(ts);

Timestamp ts = new Timestamp(System.currentTimeMillis()); 

Date date = new Date();

date = ts;

Date date = new Date();
String time = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
time = sdf.format(date);
Timestamp ts = Timestamp.valueOf(time);