Struts1.2+Spring2.5+Hibernate3.2框架搭建（十六）

附：工具类ZlkUtil.java

package com.zlk.util;

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import java.util.Calendar;

import java.util.Random;

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public class ZlkUtil {

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??? /**

??? ?* 获得唯一字符串的方法（str+"_"+毫秒数+4位随机数）（循环添加的时候不建议用，可能出现重复）

??? ?*

??? ?* @param str

??? ?* @return

??? ?*/

??? public static String getCoustomKeyID(String str) {

?????? Random rand = new Random();

?????? return str + "_" + Calendar.getInstance().getTimeInMillis()+ (rand.nextInt(9999 - 1000 + 1) + 1000);

??? }

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??? /**

??? ?* 单例模式生成唯一字符串

??? ?*

??? ?* @return

??? ?*/

??? public static synchronized String getUniqueString() {

?????? if (generateCount > 99999) generateCount = 0;

?????? String uniqueNumber = Long.toString(System.currentTimeMillis())+ Integer.toString(generateCount);

?????? generateCount++;

?????? return uniqueNumber;

??? }

??? private static final int MAX_GENERATE_COUNT = 99999;

??? private static int generateCount = 0;

???

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}