accountgenerator.java

来自「上网计费系统,适用网吧或者自己学习用用JAVA写成」· Java 代码 · 共 56 行

package com.briup.util;

import com.briup.service.IService;
/*
 * 根据高低值算法产生一个唯一的ADSL帐号
 */
public class AccountGenerator {
	private static AccountGenerator ag;

	private IService iService;

	private Long low = 0L;

	private Long high = 0L;

	private AccountGenerator() {
		try {
			iService = BeanFactory.getService();
		} catch (Exception e) {
			e.printStackTrace();
		}
		high = getHigh();
	}

	public static synchronized AccountGenerator getInstance() {
		if (ag == null) {
			ag = new AccountGenerator();
		}
		return ag;
	}

	private Long getHigh() {
		Long temp = 0L;
		try {
			temp = iService.getHighValue();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return temp;
	}

	/**
	 * 每个帐号都是以ADSL开头
	 */
	public String getUniqueCode() {
		String code = "ADSL" + high + (++low);
		return code;
	}

	public static void main(String[] args) {
		System.out.println("**********:"
				+ AccountGenerator.getInstance().getUniqueCode());
	}

}