randomaccount.java

EJB的网上银行系统,非常具有参考价值

package bankonlinesystem.common.util;

import java.util.Calendar;
import java.util.Random;
import java.util.GregorianCalendar;

//得到随机生成卡号
public class RandomAccount {
    public static String accountId() {
    Calendar cal = new GregorianCalendar();
    Integer year = new Integer(cal.get(Calendar.YEAR));
    Integer month = new Integer(cal.get(Calendar.MONTH) + 1);
    Integer day = new Integer(cal.get(Calendar.DATE));
    Integer hour = new Integer(cal.get(Calendar.HOUR_OF_DAY));
    Integer min = new Integer(cal.get(Calendar.MINUTE));
    Integer sec = new Integer(cal.get(Calendar.SECOND));
    Integer msec = new Integer(cal.get(Calendar.MILLISECOND));

    Random r = new Random();
    Integer i = new Integer(Math.abs(r.nextInt()));
    String s = i.toString().substring(1, 4);
    return year.toString() +
        month.toString() +
        day.toString() +
        hour.toString() +
        min.toString() +
        sec.toString() +
        msec.toString() +
        i.toString().substring(1, 4);
  }

}