[Java Spring Boot] Consume REST API #SpringBoot

consumeRestApi.java

package com.example.project;

import java.util.Map;

import org.json.JSONException;
import org.json.JSONObject;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class NewsController {


	public  News getNews() throws Exception{
    	JSONObject news = new JSONObject();
    	String getUrl = "https://api.nytimes.com/svc/topstories/v2/home.json?ef00222412e043fc8c50c9b6c2bdeceb";
    	HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<String> entity = new HttpEntity<>(headers);
        ResponseEntity<Map> topStories = restTemplate.exchange(getUrl, HttpMethod.GET, entity, Map.class);
        
        if (topStories.getStatusCode() == HttpStatus.OK) {
            news = new JSONObject(topStories.getBody());
        }
        return news;
	}
	
}


@SpringBootApplication
public class RestBooksApi {
    static RestTemplate restTemplate;
    public RestBooksApi() {
        restTemplate = new RestTemplate();
    }
	
	public static void main(String[] args) {
		SpringApplication.run(RestBooksApi.class, args);
		try {
		    JSONObject books = getEntity();
		    System.out.println(books);
		    
		} catch (Exception e) {
		    e.printStackTrace();
		}
	}
	
	public static JSONObject getEntity() throws Exception {
	    JSONObject books = new JSONObject();
	    String getUrl = "https://www.googleapis.com/books/v1/volumes?q=isbn:0747532699";
	    HttpHeaders headers = new HttpHeaders();
	    headers.setContentType(MediaType.APPLICATION_JSON);
	    HttpEntity<String> entity = new HttpEntity<>(headers);
	    ResponseEntity<Map> bookList = restTemplate.exchange(getUrl, HttpMethod.GET, entity, Map.class);
	    
	    if (bookList.getStatusCode() == HttpStatus.OK) {
	        books = new JSONObject(bookList.getBody());
	    }
	    return books;
	}
}