make RESTful API call ONLY by calls in java.io

Question

I was asked is there anyway to call RESTful API only by java.io. No java.net URL and 3rd party library. I did try to open HTTP by different reader/InputStream under java.io, it seems getting FileNotFoundExceptions, etc.

Any ideas?

Answer 1

According to the Java documentation:

Package java.io

Provides for system input and output through data streams, serialization and the file system.

In order to make a REST call using such such approach, you may write a REST method call into a JSON format and payload into a File then have a another application read the file that will then do the actual REST API call.

And since this is not a direct REST call, the answer to your question is that it's not possible not to use any networking module of the Java Platform to achieve what you require.

Although I wonder why you are restricted to use only java.io for REST API calls?

Answer 2

我认为它可以通过 OS 命令间接进行 RESTful 调用，例如编写 curl 脚本并使用 Process 来执行它，它将输出重定向到一个文件，然后读取输出文件以解析输出 JSON