java定时器每月月末自动执行

public String pkBySalesTurnover(Department accepetDepartment,Department raiseDepartment,DepartmentPK departmentPk){
  //设置TimerTask
        TimerTask task = new TimerTask() {
   @SuppressWarnings("static-access")
   @Override
            public void run() {
          Calendar calendar=Calendar.getInstance();
                int year = calendar.get(Calendar.YEAR);
                int month = calendar.get(Calendar.MONTH);
                int day = calendar.get(Calendar.DATE);
          System.out.println("year"+year);
          System.out.println("month-1--"+(month-1));
          System.out.println("day--"+day);
          calendar.set(Calendar.YEAR, year);
          calendar.set(Calendar.MONTH,(month-1));
    int end=calendar.getActualMaximum(calendar.DAY_OF_MONTH);
    int begin=calendar.getActualMinimum(calendar.DAY_OF_MONTH);
    System.out.println("当前月第一天："+begin+"--------"+"当前月份最后一天："+end+"现在是几号："+day);
    if(end==day){
     //是本月最后一天执行计算代码(未完成)
     System.out.println("success");
    }else{
     System.out.println("false");
    }
            }
        };
        //设置执行时间
        Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DAY_OF_MONTH);//每天
        //定制每天的23:59:59执行，
        calendar.set(year, month, day, 15, 45, 59);
        Date date = calendar.getTime();
        Timer timer = new Timer();
        System.out.println(date);
        //int period = 2 * 1000;
        //每天的date时刻执行task，每隔2秒重复执行
        //timer.schedule(task, date, period);
        //每天的date时刻执行task, 仅执行一次
        timer.schedule(task, date);
  return SUCCESS;
 }