Spring Web Client# RestTemplate

@SpringBootApplication
@RestController
@EnableWebMvc
public class DemoApplication {

  private static String host = "xxxx";
  private static String path = "xxxx";
  private static String appcode = "xxx";

  @Autowired
  private RestTemplate restTemplate;

  @Bean
  public ClientHttpRequestFactory clientHttpRequestFactory() {
    HttpComponentsClientHttpRequestFactory clientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory();
    clientHttpRequestFactory.setHttpClient(HttpClients.createDefault());
    clientHttpRequestFactory.setConnectTimeout(10000);
    clientHttpRequestFactory.setReadTimeout(10000);
    clientHttpRequestFactory.setConnectionRequestTimeout(200);
    return clientHttpRequestFactory;
  }

  @Bean
  public RestTemplate restTemplate(ClientHttpRequestFactory clientHttpRequestFactory) {
    RestTemplate restTemplate = new RestTemplateBuilder().requestFactory(clientHttpRequestFactory)
        .additionalMessageConverters(new StringHttpMessageConverter(Charset.forName("UTF-8")))
        .additionalInterceptors(new HttpHeaderInterceptor("Authorization", "APPCODE " + appcode)).build();
    return restTemplate;
  }

  @GetMapping(value = "test", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
  public Object test() throws IOException {
    Map<String, Object> params = new HashMap<>();
    params.put("cityId", 2);
    params.put("token", "677282c2f1b3d718152c4e25ed434bc4");
    ObjectMapper objectMapper = new ObjectMapper();
    String body = objectMapper.writer().writeValueAsString(params);
    HttpEntity<String> formEntity = new HttpEntity<String>(body);
    ResponseEntity<String> responseEntity = restTemplate.postForEntity(host + path, formEntity, String.class);
    return responseEntity.getBody();
  }

  public static void main(String[] args) {
    SpringApplication.run(DemoApplication.class, args);
  }
}