java - 比较日期Java格式问题

Question

尝试在 java 中比较一些日期但无法正确设置格式，我哪里出错了？

DateFormat df = new SimpleDateFormat("dd/mm/yyyy");
    Date date1 = null, date2 = null, today = new Date();
date1 = (Date) df.parse(scan.next());

System.out.println(date1);
            System.out.println(today);
if(date1.compareTo(today) < 0){
        date1 = null;
        System.out.println(start + " is not a valid date.. please try again!");
        }

Please enter a start date:
10/04/2011
Mon Jan 10 00:04:00 GMT 2011
Tue Apr 05 22:27:44 BST 2011

Answer 1

我认为你需要MM，而不是mm

来自 the doc :

M Month in year
m Minute in hour