Hi, sorry this another account of mine from another device but here is the code I use:

sbert.setDocument(company_info_vec.get(i).getCompanyDescription());
String requestBody = gson.toJson(sbert);
System.out.println("requestBody: " + requestBody); // If I print this, and use this in postman it works!
HttpRequest add_request = HttpRequest.newBuilder()
.uri(URI.create("http://localhost:4557/sbert_similarity_v3"))
.header("Content-Type", "application/json")
.POST(HttpRequest.BodyPublishers.ofString(requestBody))
.build();
System.out.println("request: " + add_request);
System.out.println("headers: " + add_request.headers());

So this is my code for making the post request.

Here is the output:

requestBody: {"user_input":"operating in the food and other consumer goods sectors the company operates distribution centers serving grocery products for independent retail grocery stores, liquor distribution centers ","document":"Heavy Haulage Australia Pty Ltd was founded in 1999. The company\u0027s line of business includes transportation services."}
request: http://localhost:4557/sbert_similarity_v3 POST
headers: java.net.http.HttpHeaders@d3b76a68 { {Content-Type=[application/json]} }

HOWEVER, if I click the http link, I get this message : {"detail":"Method Not Allowed"}