Sending input as json and receiving the ouput as json using java HttpURLConnection and Spring MVC Controller

Question

I want to send the input as json using the HttpURLConnection in java client and the request will be handled by the Spring MVC library jacksonhaus to response the output as json

URL url = new URL("http://www.test.com/SpringMVC/rest/service/getEmpDetails");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");

String input = "{\"name\":\"emp1\",\"add\":\"emp2\"}";

OutputStream os = conn.getOutputStream();
os.write(input.getBytes());
os.flush();

if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
    throw new RuntimeException("Failed : HTTP error code : "
        + conn.getResponseCode());
}

When i use this code i am getting

HTTP error code : 500

In Spring MVC am using the model Attribute for the input Request. Can anyone help me on this.

Answer 1

Not sure about your controller code are you sending http_created from controller? should you be looking for HttpURLConnection.HTTP_OK .

Below code may help you

Controller code:

@RequestMapping(value="/jsonconsumer", method=RequestMethod.POST, consumes=MediaType.APPLICATION_JSON_VALUE)
public @ResponseBody String consumer(@RequestBody JavaBean javaBean) {
    return "created";
}

JavaBean code:

@XmlRootElement
public class JavaBean {

    private String name = "";
    private String add = "";

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAdd() {
        return add;
    }

    public void setAdd(String add) {
        this.add = add;
    }

    @Override
    public String toString() {
        return "JavaBean {name=[" + name + "], add=[" + add + "]}";
    }
}