java相差小时数

public static String getTime(Date date){
   StringBuffer time = new StringBuffer();
       Date date2 = new Date();
       long temp = date2.getTime() - date.getTime();    
       long days = temp / 1000 / 3600/24;                //相差小时数
       if(days>0){
           time.append(days+"天");
       }
       long temp1 = temp % (1000 * 3600*24);
       long hours = temp1 / 1000 / 3600;                //相差小时数
       if(days>0 || hours>0){
           time.append(hours+"小时");
       }
       long temp2 = temp1 % (1000 * 3600);
       long mins = temp2 / 1000 / 60;                    //相差分钟数
       time.append(mins + "分钟");
       return  time.toString();
}