java日期和时间戳格式互转

// 将日期格式转换成时间戳

public static void main(String[] args) throws Exception{
    String time = "2018-05-12 12:30:59";
    Date parse = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(time);
    Long time1 = parse.getTime();
    System.out.println(time + " >> " + time1);
}

// 将时间戳转换成日期格式

public static void main(String[] args) {
    Long time  = 1527816283000L;
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String time1 = sdf.format(new Date(time));
    System.out.println(time + " >> " + time1);
}