Java - how to make Jsoup http POST request with json body payload and get json as response?

To make Jsoup HTTP Post with Json request and Json response,
the most important part of the code is to add the correct http headers:

Connection.Response execute = Jsoup.connect(url)
        .header("Content-Type", "application/json")
        .header("Accept", "application/json")

Jsoup full request can looks like this:

String jsonBody = "{\"userId\":12345,\"userHash\":\"abc123\"}";

String url = "http://localhost:8080/getUser";

Connection.Response execute = Jsoup.connect(url)
        .header("Content-Type", "application/json")
        .header("Accept", "application/json")
        .followRedirects(true)
        .ignoreHttpErrors(true)
        .ignoreContentType(true)
        .userAgent("Mozilla/5.0 AppleWebKit/537.36 (KHTML," +
                " like Gecko) Chrome/45.0.2454.4 Safari/537.36")
        .method(Connection.Method.POST)
        .requestBody(jsonBody)
        .maxBodySize(1_000_000 * 30) // 30 mb ~
        .timeout(0) // infinite timeout
        .execute();

Full working example with spring boot controller:

• Jsoup main class with request and response
• Spring boot controller
• User request class
• User response class

Jsoup main class with request and response:

import com.fasterxml.jackson.databind.ObjectMapper;
import org.jsoup.Connection;
import org.jsoup.Jsoup;

public class JsoupHttpPostWithJsonRequestAndJsonResponseExample {

    public static void main(String[] args) throws Exception {

        UserRequest userRequest = new UserRequest(12345L, "abc123");
        System.out.println("# UserRequest:");
        System.out.println(userRequest);

        String jsonBody = new ObjectMapper().writeValueAsString(userRequest);
        // String jsonBody = "{\"userId\":12345,\"userHash\":\"abc123\"}";
        System.out.println("# Json Body:");
        System.out.println(jsonBody);

        String url = "http://localhost:8080/getUser";
        Connection.Response execute = Jsoup.connect(url)
                .header("Content-Type", "application/json")
                .header("Accept", "application/json")
                .followRedirects(true)
                .ignoreHttpErrors(true)
                .ignoreContentType(true)
                .userAgent("Mozilla/5.0 AppleWebKit/537.36 (KHTML," +
                        " like Gecko) Chrome/45.0.2454.4 Safari/537.36")
                .method(Connection.Method.POST)
                .requestBody(jsonBody)
                .maxBodySize(1_000_000 * 30) // 30 mb ~
                .timeout(0) // infinite timeout
                .execute();

        int statusCode = execute.statusCode();
        System.out.println("statusCode: " + statusCode); //  200

        String responseJson = execute.body();
        ObjectMapper mapper = new ObjectMapper();
        UserResponse userResponse = mapper
                .readValue(responseJson, UserResponse.class);

        System.out.println("# UserResponse de-serialized:");
        System.out.println(userResponse);
    }
}

Output:

# UserRequest:
UserRequest{userId=12345, userHash='abc123'}
# Json Body:
{"userId":12345,"userHash":"abc123"}
statusCode: 200

# From spring boot controller - User request:
UserRequest(userId=12345, userHash=abc123)

# UserResponse de-serialized:
UserResponse{username='Seth', userAge=25}

Spring boot controller:

import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    @PostMapping(path = "/getUser",
            consumes = "application/json", produces = "application/json")
    public UserResponse getUser(@RequestBody UserRequest userRequest) {
        System.out.println("# From spring boot controller - User request:");
        System.out.println(userRequest.toString());

        return new UserResponse("Seth", 25);
    }
}

User request class:

public class UserRequest {
    private long userId;
    private String userHash;

    public UserRequest() {

    }

    public UserRequest(long userId, String userHash) {
        this.userId = userId;
        this.userHash = userHash;
    }

    public long getUserId() {
        return userId;
    }

    public void setUserId(long userId) {
        this.userId = userId;
    }

    public String getUserHash() {
        return userHash;
    }

    public void setUserHash(String userHash) {
        this.userHash = userHash;
    }

    @Override
    public String toString() {
        return "UserRequest{" +
                "userId=" + userId +
                ", userHash='" + userHash + '\'' +
                '}';
    }
}

User response class:

public class UserResponse {
    private String username;
    private int userAge;

    public UserResponse() {

    }

    public UserResponse(String username, int userAge) {
        this.username = username;
        this.userAge = userAge;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public int getUserAge() {
        return userAge;
    }

    public void setUserAge(int userAge) {
        this.userAge = userAge;
    }

    @Override
    public String toString() {
        return "UserResponse{" +
                "username='" + username + '\'' +
                ", userAge=" + userAge +
                '}';
    }
}