java用SDF方法获取当前系统时间

import java.text.SimpleDateFormat;
import java.util.Date;
public class ShuiDianFei {
public static void main(String[] args) {
SimpleDateFormat sdf = new SimpleDateFormat(“yyyy-MM-dd-hh-mm-ss”);
String aa = sdf.format(new Date());
System.out.println(aa);
}
}