單例（後半部分）

/**
     * 在jboss啓動的時候獲取第一次統計時間
     * @return date類型，第一次執行的整點時間
     */
    public static Date getFistStatistDate()
    {
        Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR);
        int min = c.get(Calendar.MINUTE);

        //如果當前是23點裏面分兩種情況
        if (hour == 23)
        {
            //是整點，返回整點
            if (min == 0)
            {
                c.set(Calendar.SECOND, 0);
                return c.getTime();
            }

            //不是整點，返回0點
            else
            {
                c.set(Calendar.HOUR, hour + 1);
                c.set(Calendar.MINUTE, 0);
                c.set(Calendar.SECOND, 0);
                return c.getTime();
            }

        }

        //如果當前不是23點，也分兩種
        else
        {
            //如果是其他正點，返回整點
            if (min == 0)
            {
                c.set(Calendar.SECOND, 0);
                return c.getTime();
            }

            //否則返回下一個整點
            else
            {
                c.set(Calendar.HOUR, hour + 1);
                c.set(Calendar.MINUTE, 0);
                c.set(Calendar.SECOND, 0);
                return c.getTime();
            }
        }
    }


    /**
     * 獲取下一個統計時間整點時刻,測試通過
     * @return
     */
    public static Date getNextStatistDate()
    {
        Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR);
        c.set(Calendar.HOUR, hour + 1);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        return c.getTime();
    }


    private void beginStatist() throws Exception
    {
        try
        {
            DmfTransactionDelegate.beginTransaction();
            DmfStatistDelegate.statist();
            DmfTransactionDelegate.commit();
        }
        catch (Throwable e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 獲取所有統計到得數據
     * @throws Exception
     */
    public String printData() throws Exception
    {
        String rs = "statis error!   please check your code!";
        try
        {
            DmfTransactionDelegate.beginTransaction();
            rs = DmfStatistDelegate.printData();
            DmfTransactionDelegate.commit();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return rs;
    }
}