POST a file to Document library using java

How do I make a post request to a document library using java?

I’m using the lastest version on this library http://hc.apache.org/

This is my post request right now:

itemUrl looks like this: http://industrial-ex/sites/tifdemo/enovia/FILENAME.txt

public void addItem(String itemUrl, File file) throws IOException {
    FileInputStream fileInputStream = new FileInputStream(file);
    HttpEntity test = new InputStreamEntity(fileInputStream);
    HttpPost request = new HttpPost(itemUrl);
    System.out.println("ITEM URL: " + itemUrl);
    request.addHeader("Content-Type", "application/json;odata=verbose");
    request.setEntity(test);
    CloseableHttpResponse response = httpClient.execute(target, request, context);
    response.addHeader("Content-Type", "application/json;odata=verbose");
    System.out.println("STATUS CODE POST: " + response.getStatusLine());

}

I’m getting a status code:

200 OK

but my document library is empty and nothing shows up.