String 类型 日期时间大小的比较

public void compareDate(String date1,String date2){
DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");
try {
Date d1 = dateFormat.parse(date1);
Date d2 = dateFormat.parse(date2);
if(d1.equals(d2)){
System.out.println(date1+"="+date2);
}else if(d1.before(d2)){
System.out.println(date1+"在"+date2+"之前");
}else if(d1.after(d2)){
System.out.println(date1+"在"+date2+"之后");
}
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("方法——compareDate（{}，{}）异常"+date1+","+date2);
}
}

public void compateDate2(String date1,String date2){DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");try {Date d1 = dateFormat.parse(date1);Date d2 = dateFormat.parse(date2);if(d1.getTime()>d2.getTime()){System.out.println(date1+"在"+date2+"之后");}else if(d1.getTime()<d2.getTime()){System.out.println(date1+"在"+date2+"之前");}else{System.out.println(date1+"="+date2);}} catch (ParseException e) {System.out.println("方法——compateDate2（{}，{}）异常"+date1+","+date2);e.printStackTrace();}}