자바 에서 자동 으로 인 코딩 생 성, 예 를 들 어 18 비트, 20 비트 등

    /***
     * 
     * getCommonBh:(       ：  （       N +    （     ）+    sequence ：00001）). 

     * @author syzhao
     * @param prefix      
     * @param timeFormt     ，           
     * @param sequenceName sequence  
     * @param length sequence   %08d：8     0
     * @return      
     * @since JDK 1.6
     */
    public String getCommonBh(String prefix, String timeFormt, String sequenceName, String length)
    {
        String datenumber = "";
        if (StringUtils.isNotEmpty(timeFormt))
        {
            datenumber = DateUtils.doFormatDate(new Date(), timeFormt);
        }
        if (StringUtils.isEmpty(length))
        {
            length = "8";
        }
        String seqStr = getSequenceByName(sequenceName, length);
        return new StringBuilder(prefix).append(datenumber).append(seqStr).toString();
    }
    
    /**
     * 
     * getSequenceByName:(       sequence ). 

     * @author syzhao
     * @param sequenceName sequence  
     * @param length      ，    ：：8     0
     * @return String      sequence 
     * @since JDK 1.6
     */
    public String getSequenceByName(final String sequenceName, final String length)
    {
        if (StringUtils.isBlank(sequenceName))
        {
            return "";
        }
        else
        {
            return (String)this.getHibernateTemplate().execute(new HibernateCallback()
            {
                public Object doInHibernate(Session session)
                    throws SQLException
                {
                    Query query = getSession().createSQLQuery(" SELECT " + sequenceName + ".nextval from dual");
                    BigDecimal seq = (BigDecimal)query.uniqueResult();
                    if (seq != null)
                    {
                        return String.format("%0" + length + "d", seq.longValue());
                    }
                    else
                    {
                        return "001";
                    }
                }
            });
        }
    }