JAVA 两个日期的比较

1.使用after或before

注意是import java.util.Date;

1）日期相同的时候

        Date date = new Date(2016,9,6);
        Date date2 = new Date(2016,9,6);
        System.out.println(date.before(date2));//false
        System.out.println(date.after(date2));//false

2）日期1小于日期2

        Date date = new Date(2016,9,5);
        Date date2 = new Date(2016,9,6);
        System.out.println(date.before(date2));//true
        System.out.println(date.after(date2));//false

3）日期1大于日期2

        Date date = new Date(2016,9,7);
        Date date2 = new Date(2016,9,6);
        System.out.println(date.before(date2));//false
        System.out.println(date.after(date2));//true