STS policy 设置为对某一目录操作，java后台通过令牌查询这一目录文件列表无权限,何解？

扮演的角色 给的权限： AliyunOSSFullAccess, STS 里设置的policy如下：

{
  "Version": "1", 
  "Statement": [
      {
          "Action": [
              "oss:*"
          ], 
          "Resource": [
              "acs:oss:*:*:baoquan2/123/123456/*"
          ], 
          "Effect": "Allow"
      }
 ]
}

java代码 阿里云问题.png

问题： Java里调用listObjects就报错，说无权限

com.aliyun.oss.OSSException: Access denied by authorizer's policy.
[ErrorCode]: AccessDenied
[RequestId]: 5F291284C3F722373575663C
[HostId]: baoquan2.oss-cn-hangzhou.aliyuncs.com
[ResponseError]:
<?xml version="1.0" encoding="UTF-8"?>
<Error>
  <Code>AccessDenied</Code>
  <Message>Access denied by authorizer's policy.</Message>
  <RequestId>5F291284C3F722373575663C</RequestId>
  <HostId>baoquan2.oss-cn-hangzhou.aliyuncs.com</HostId>
</Error>