How to transform a time value into YYYY-MM-DD format in Java?

Question

How can I transform a time value into YYYY-MM-DD format in Java?

long lastmodified = file.lastModified();
String lasmod =  /*TODO: Transform it to this format YYYY-MM-DD*/

Answer 1

Something like:

Date lm = new Date(lastmodified);
String lasmod = new SimpleDateFormat("yyyy-MM-dd").format(lm);

See the javadoc for SimpleDateFormat .

Answer 2

final Date modDate = new Date(lastmodified);
final SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");
final String lasmod = f.format(modDate);

SimpleDateFormat

Answer 3

String lasmod = new SimpleDateFormat("yyyy-MM-dd").format(new Date(lastmodified));

查找SimpleDateFormat所需的正确模式...我可能在内存中包含了错误的模式。

Answer 4

Date d = new Date(lastmodified);
DateFormat form = new SimpleDateFormat("yyyy-MM-dd");
String lasmod = form.format(d);

Answer 5

Try:

import java.text.SimpleDateFormat;
import java.util.Date;

long lastmodified = file.lastModified();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
String lastmod =  format.format(new Date(lastmodified));