请问flink如何批/流读写阿里云oss? 我试着通过filesystem sql connector [1] 连接oss，按照官网配置oss endpoint, accessKey (id + secret) [2] 在flink-conf.yaml文件，程序仍然报找不到 fs.oss.endpoint，我已经将 flink-oss-fs-hadoop jar放进了 plugins/目录下面。想问一下读写oss是否一定要依赖于hadoop呢？官网有提及 Hadoop Aliyun module，不知道具体做法是什么？还请给个具体实操例子，谢谢！
[1]
https://ci.apache.org/projects/flink/flink-docs-master/dev/table/connectors/filesystem.html[2]
https://ci.apache.org/projects/flink/flink-docs-master/deployment/filesystems/oss.html[3]
http://hadoop.apache.org/docs/current/hadoop-aliyun/tools/hadoop-aliyun/index.html
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