UUID操做類

package com.myTest;

import java.util.UUID;
import java.util.zip.CRC32;

/**
 * UUID操做類
 * @author 
 */
public class UUIDTest
{

    /**
     * 生成32位的UUID，去掉"-"符號
     * @return 返回生成的UUID
     */
    public static String getUUID()
    {
        UUID uuid = UUID.randomUUID();
        String str = uuid.toString();
        // 去掉"-"符號
        String temp = str.substring(0, 8) + str.substring(9, 13) + str.substring(14, 18) + str.substring(19, 23)
                + str.substring(24);
        System.out.println(temp);
        return temp;
    }

    /**
     * 生成32位的UUID
     * @return
     */
    public static UUID getUUID1()
    {
        UUID uuid = UUID.randomUUID();
        System.out.println(uuid);
        return uuid;
    }
    
    /**
     * 根據UUID生成CRC的校驗碼
     * @param string
     * @return
     */
    private static String mkCrc(String string)
    {
        CRC32 crc32 = new CRC32();
        crc32.update(string.getBytes());

        return Long.toHexString(crc32.getValue());
    }

    
    /**
     * main 測試方法
     * @param args
     */
    public static void main(String[] args)
    {
        String temp = getUUID();

        System.out.println(mkCrc(temp));

        System.out.println(temp.length());
    }

}