时间戳转化

package com.xfm.utils;

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

/**
 * 时间戳转化
 *
 * @author xfm
 */
public class TimeStampsTransform {
    /**
     * 根据时间戳创建Date对象
     *
     * @param timestamps
     * @return
     */
    public static Date getDate(Long timestamps) {
        return new Date(timestamps);
    }

    /**
     * 格式化时间戳
     *
     * @param timestamps
     * @return
     */
    public static String format(Long timestamps) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");
        Date d = new Date(timestamps);
        return sdf.format(d);
    }

    /**
     * 自定义格式化时间戳
     *
     * @param timestamps
     * @param pattern
     * @return
     */
    public static String format(Long timestamps, String pattern) {
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        Date d = new Date(timestamps);
        return sdf.format(d);
    }

    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        Date date = calendar.getTime();
        System.out.println(format(date.getTime()));
        String string = format(date.getTime(), "yyyy-MM-dd HH:mm:ss");
        System.out.println(string);
        System.out.println(getDate(date.getTime()));

    }
}