Java中操作时间比较好用的类

import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.commons.lang.time.FastDateFormat;

public class TestController {
    public static void  main(String [] args) {
        SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String ff1 = sdf.format(new Date());
        System.out.println(ff1);
        DateFormatUtils df=new DateFormatUtils();
        FastDateFormat ff2 = FastDateFormat.getInstance("yyyyMMddHHmmssSSS");
        String format = ff2.format(new Date());
        System.out.println(format);
        String ff3 = DateFormatUtils.format(new Date(), "yyyyMMddHHmmssSSS");
        System.out.println(ff3);
    }
}