Conversion between time string and Date

1, String time conversion Date

The format passed by the user is "20201010", "2020-1010" or "2020.10.10". To convert to Date, use the DateUtil.parse() method in Hutool. parse() will automatically identify the string to obtain the Date type. Data, the date format obtained is 2020-10-10 type. In this way, there is no need to determine what type of time string the user enters.

Note: If the format of the string is 2020.02 and there is no complete date, DateUtil.parse() will not be able to recognize it, and you must add a format style after it.

        String strTime = "2020.10.10";
        // 输出2020-10-10 00:00:00
        Date date = DateUtil.parse(strTime);

		// 如果字符串时间不是完整格式，例如2020-10
		String strTime = "2020-10";
        // 输出 2020-10-01 00:00:00
        Date date = DateUtil.parse(strTime,"yyyy-MM");

2. Convert Date type to string

Use the DateUtil tool class:

        Date date = DateUtil.date();
        // 年月日2020-12-24
        System.out.println("年月日" + DateUtil.formatDate(date));
        // 时分秒16:49:08
        System.out.println("时分秒" + DateUtil.formatTime(date));
        // 年月日 时分秒2020-12-24 16:49:08
        System.out.println("年月日 时分秒" + DateUtil.formatDateTime(date));