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import java.security.SecureRandom;
import java.util.UUID;
/**
* 封装各种生成唯一性ID算法的工具类.
*
* @author
*/
public final class Identities {
private static SecureRandom random = new SecureRandom();
private static Identities instance = new Identities();
private Identities()
{
}
/**
* 返回实例
* @return
*/
public static Identities getInstance()
{
return instance;
}
/**
* 封装JDK自带的UUID, 通过Random数字生成, 中间无-分割
* @return 不带-分割的32位字符串
*/
public static String uuid() {
return UUID.randomUUID().toString().replaceAll("-", "");
}
/**
* 封装JDK自带的UUID, 通过Random数字生成, 中间有-分割.
* @return
*/
public static String uuid2() {
return UUID.randomUUID().toString();
}
public static void main(String[] args){
System.out.println(Identities.uuid2());
System.out.println(Identities.uuid());
//输出结果
//af39aa77-76b7-430e-96b1-a3efee50a18d
//4a400cc26169452190c98cf2004d38b8
}
}
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