Question

Java 日期转换问题

请问 String dataStr = "04/04/2012"; 这种日期格式怎么转换成 (Date)2012-04-04的形式.

Answer 1

import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.util.*;
public class DateFomatParse {
public DateFomatParse() {
}
public static void main(String[] args){

try
{
String s = "01/04/2012";
SimpleDateFormat fomat = new SimpleDateFormat("dd/MM/yyyy");
Date date = fomat.parse(s);
SimpleDateFormat fomat2 = new SimpleDateFormat("yyyy-MM-dd");
String mydate = fomat2.format(date);
System.out.println(mydate);
} catch (ParseException ex)
{

}
}

}

Answer 2

String dataStr = "04/04/2012";
SimpleDateFormat df1 = new SimpleDateFormat("MM/dd/yyyy");
SimpleDateFormat df2 = new SimpleDateFormat("yyyy-MM-dd");

System.out.println(df2.format(df1.parse(dataStr)));

Answer 3

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
dateFormat.parse(dataStr);

Answer 4

SimpleDateFormat dateDayFormat = new SimpleDateFormat("yyyy-MM-dd");
dateDayFormat.parse(dateStr);

Answer 5

SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Date date = sdf.parse(dateStr);

Answer 6

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