java日期时间比较大小

String timeStr1 = “2016-07-10 21:18:08”;
String timeStr2 = “2016-08-10 21:30:08”;

DateFormat df = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);
Date time1 = df.parse(timeStr1);
Date time2 = df.parse(timeStr2);
int i = time1.compareTo(time2);

.compareTo() 返回int类型
若time1在time2前 则返回负数
若time1在time2后 则返回正数
若time1等于time2 则返回0