不知道为什么,我shiro生产的是这个而不是UUID？

不知道为什么,我shiro生产的是这个而不是UUID？

  /**
     * Session ID 生成器
     *
     * @return JavaUuidSessionIdGenerator
     */
    @Bean
    public JavaUuidSessionIdGenerator sessionIdGenerator() {
        return new JavaUuidSessionIdGenerator();
    }

/**
 * {@link SessionIdGenerator} that generates String values of JDK {@link java.util.UUID}'s as the session IDs.
 *
 * @since 1.0
 */
public class JavaUuidSessionIdGenerator implements SessionIdGenerator {

    /**
     * Ignores the method argument and simply returns
     * {@code UUID}.{@link java.util.UUID#randomUUID() randomUUID()}.{@code toString()}.
     *
     * @param session the {@link Session} instance to which the ID will be applied.
     * @return the String value of the JDK's next {@link UUID#randomUUID() randomUUID()}.
     */
    public Serializable generateId(Session session) {
        return UUID.randomUUID().toString();
    }
}

看下你UUID生成的代码