Java工具：業務編號生成

package com.zycfc.mpc.process.util;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.lang3.StringUtils;
/**
 *  * 產生流水號工具類  * @version V1.0  * @date: 2013-11-16 下午5:21:37  
 */
public class SerialNum {
	private static String count = "000";
	private static String dateValue = "20131115";
	public synchronized static String getMoveOrderNo() {
		long No = 0;
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
		String nowdate = sdf.format(new Date());
		No = Long.parseLong(nowdate);
		if (!(String.valueOf(No)).equals(dateValue)) {
			count = "000";
			dateValue = String.valueOf(No);
		}
		String num = String.valueOf(No);
		num += getNo(count);
		num = "chan" + num;
		return num;
	}
	public synchronized static String getMoveOrderNo(String serialNum) {
		String nyr = StringUtils.substring(serialNum, 2, 10); // 獲取年月日字符串
		String countV = StringUtils.substring(serialNum, 10); // 獲取流水號
		if (Integer.valueOf(countV) > Integer.valueOf(count)) {
			dateValue = nyr;
			count = String.valueOf(countV);
		}
		return getMoveOrderNo();
	}
	public static String getNo(String s) {
		String rs = s;
		int i = Integer.parseInt(rs);
		i += 1;
		rs = "" + i;
		for (int j = rs.length(); j < 4; j++) {
			rs = "0" + rs;
		}
		count = rs;
		return rs;
	}
	public static void main(String[] args) {
		for (int i = 0; i < 100; i++) {
			System.out.println(getMoveOrderNo());
		}
	}
}