shiro 清除指定用户授权缓存shiro 清除指定用户授权缓存

/**
   * 清空用户关联权限认证，待下次使用时重新加载
   */
  public void clearCachedAuthorizationInfo(Principal principal) {
      Subject subject = SecurityUtils.getSubject();   
       // String realmName = subject.getPrincipals().getRealmNames().iterator().next();   
        SimplePrincipalCollection principals = new SimplePrincipalCollection(principal,getName());   
        subject.runAs(principals);   
        clearCachedAuthorizationInfo(subject.getPrincipals());
        subject.releaseRunAs();
  }