数据库表中MAX ID获取,确保每次调用没有重复工具类（NumberUtil）

下面这个类是获取数据库中一个字段的最大值。配置在数据库中。

public class NoFactory {
	private final static Logger cLogger = Logger.getLogger(NoFactory.class);
	
	protected static final byte cClusterId = 0;
	protected static final byte cClusterCount = 1;
private static final byte[] BLCTRANNOId = new byte[0];
	private static int BLCTRANNO;
	static {
		try {

			BLCTRANNO = Integer.parseInt(new ExeSQL().getOneValue("select max(to_number(BLCTRANNO)) from edorrenewalbalanceacc where mod(BLCTRANNO,"+cClusterCount+")="+cClusterId));
              
		} catch (Throwable ex) {
			cLogger.error("初始化最大号异常！", ex);
		}
	}
	public final static int nextBLCTRANNONo() {
		synchronized (BLCTRANNOId) {
			BLCTRANNO += cClusterCount;
		}
		return BLCTRANNO;
	} 
	
	public final static void setBLCTRANNONo(int pMaxNo) {
		synchronized (BLCTRANNOId) {
			BLCTRANNO = pMaxNo - pMaxNo%cClusterCount + cClusterId;
		}
	}
	
	}