Java Date时间转换

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1.Date转成Str

        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateStr = sdf.format(date);
        System.out.println(dateStr);

输出:

2019-01-10 18:09:07

注: yyyy-MM-dd HH:mm:ss HH大写时为24小时制,hh小写时为12小时制

2.Str转换成Date

        try {
            String dateStr = "2019-01-10 18:09:07";
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            Date transDate = sdf.parse(dateStr);
            System.out.println(transDate);
        } catch (ParseException e) {
            e.printStackTrace();
        }

输出:

Thu Jan 10 18:09:07 CST 2019