Print JSON response in Java when using REST API & HttpClient

Question

I want to know if there is an error response when sending the REST POST request, and i want to print the error as "output" in my Java application.

How do i do this?

Here is the code I'm using:

    HttpClient client = new HttpClient();

    try {
    HttpPost request = new HttpPost("example.com/api/deposit");
    StringEntity params;
    params = new StringEntity("{"
    + "\"locale\": \"" + exampleclass.getLocale() + "\","
    + "\"dateFormat\": \"" + exampleclass.getDateFormat() + "\","
    + "\"transactionDate\": \"" + exampleclass.getTransactionDate() + "\","
    + "\"transactionAmount\": \"" + exampleclass.getTransactionAmount() + "\","
    + "}");
    request.addHeader("Content-Type", "application/json");
    request.addHeader("Accept-Language", "en-US,en;q=0.8");
    request.addHeader("Authorization", "Basic somecode&&!!");
    request.setEntity(params);
    HttpResponse response = client.execute(request);

    //handle the response somehow
    //example : System.out.println (errormessage);

    } catch (Exception ex) {
    ex.printStackTrace();
    ex.getMessage();
    } finally {
    client.getConnectionManager().shutdown();

    }

Any help is greatly appreciated!

Steve Marion · Accepted Answer · 2015-08-26 13:04:44Z

2

You should be able to read the returned HTTP status code in the HttpResponse response.

response.getStatusLine().getStatusCode()

return the HTTP code, 200 means OK, another code indicate error.

answered Aug 26, 2015 at 13:04

Steve Marion

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3 Comments

Dr Cox Over a year ago

I don't see anything in my output window except " build successful ", I want to see the HTTP status code as you mentioned + the reason why, for example " account with identifier 15 does not exist ".

Steve Marion Over a year ago

You can debug your code to inspect returned value at runtime, error code have associated reason defined see [rfc2616] (w3.org/Protocols/rfc2616/rfc2616-sec6.html), any other information provided is specific for the server, see eventual documentation for the web service

Dr Cox Over a year ago

Thank you for this line of code, it was helpful eventhough it wasn't entirely what I was looking for, upvote

Rahul Yadav · Accepted Answer · 2015-08-26 13:04:47Z

1

You can use something as below:-

    String line = null;
BufferedReader rd = new BufferedReader(new InputStreamReader(getResponse.getEntity().getContent()));
            while ((line = rd.readLine()) != null)
            {
                System.out.println(line);
            }

answered Aug 26, 2015 at 13:04

Rahul Yadav

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