功能描述：两个日期相减得到天数，判断两个时间间隔是否大于7天
public static void main(String[] args) {
String str1 = "-05-10";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
Date date1 = sdf.parse(str1);
Date date2 = new Date();
//获取时间的毫秒数
System.out.println(date2.getTime());
System.out.println(date1.getTime());
//比较天数
if((date2.getTime()-date1.getTime())/(24*60*60*1000)>=7){
System.out.println("true");
}else{
System.out.println("false");
}
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
