Date date = new Date()； //獲取當前系統時間，格式為: Thu Nov 01 18:27:06 CST 2018

format: 按指定的目標格式把Date物件轉換為String

parse: 按指定的源格式把String轉換為Date物件

public class test {
    public static void main(String[] args) throws ParseException {
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String dateFormat = sdf.format(date);
        Date dateFormatParse = sdf.parse(dateFormat);
        System.out.println("date: "+date);
        System.out.println("date.toString: "+date.toString());
        System.out.println("dateFormat: "+dateFormat);
        System.out.println("dateFormatParse "+dateFormatParse);
    }
}
 

輸出：

date: Thu Nov 01 18:27:06 CST 2018 date.toString: Thu Nov 01 18:27:06 CST 2018 dateFormat: 2018-11-01 06:27:06 dateFormatParse Thu Nov 01 06:27:06 CST 2018