How to get a File or Stream from a JSONObject?

问题

How is a JSONObject from Twitter4J converted to an IOFile for use with the JsonParser from BaseX?

So, looking to use Twitter4J to get either a file or stream.

The JsonParser looks to work with a File fine:

JsonParser

public JsonParser(IO source,
          MainOptions opts,
          JsonParserOptions jopts)
           throws java.io.IOException

Constructor.

Parameters:
    source - document source
    opts - database options
    jopts - parser options
Throws:
    java.io.IOException - I/O exception

although other IO works:

org.basex.io
Class IO

    java.lang.Object
        org.basex.io.IO 

    Direct Known Subclasses:
        IOContent, IOFile, IOStream, IOUrl

How is a File acquired from a JSONObject here?

Snippet using Twitter4J:

private JSONObject jsonOps(Status status) throws JSONException, BaseXException {
    String string = TwitterObjectFactory.getRawJSON(status);
    JSONObject json = new JSONObject(string);
    String language = json.getString("lang");
    log.fine(language);
    return json;
}

回答1:

Writing a JSONObject to file file from Twitter4J seems to work, at least the file looks correct when opened manually:

public void writeJsonToFile(String fileName) throws FileNotFoundException, UnsupportedEncodingException, IOException {
    FileOutputStream fileOutputStream = null;
    OutputStreamWriter outputStreamWriter = null;
    BufferedWriter bufferedWriter = null;
    fileOutputStream = new FileOutputStream(fileName);
    outputStreamWriter = new OutputStreamWriter(fileOutputStream, "UTF-8");
    bufferedWriter = new BufferedWriter(outputStreamWriter);
    bufferedWriter.write(tweets.toString());
    bufferedWriter.close();
    outputStreamWriter.close();
    fileOutputStream.close();
}

And once the file is written, it seems quite easy to "parse" the JSON, or at least instantiate a parser, as:

private void parseJsonFile(String fileName) throws IOException {
    JsonParser jsonParser = new JsonParser(new IOFile(fileName), new MainOptions());
}

full code on github.

In no way is this a complete solution. In fact, it seems a kludge to write the JSON to a file at all -- but there it is.

Seems the only way to move JSON data from Twitter4J to BaseX, or at least most pragmatic. Other solutions appreciated.

来源：https://stackoverflow.com/questions/60015248/how-to-get-a-file-or-stream-from-a-jsonobject

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