Spring Boot 配置多个 RestTemplate 实例

场景

工程中需要配置不同处理器的RestTemplate，比如：有些场景使用默认的ErrorHandler不处理400/500异常，有些场景需要添加Interceptors拦截器。

代码

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate() {
        RestTemplate restTemplate = new RestTemplate();
        List<ClientHttpRequestInterceptor> interceptors = new ArrayList<>();
        interceptors.add(new ClientHttpRequestInterceptor() {
            @Override
            public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
                request.getHeaders().set("my-header", "my-value");
                return execution.execute(request, body);
            }
        });
        restTemplate.setInterceptors(interceptors);
        return restTemplate;
    }

    @Bean
    public RestTemplate myRestTemplate() {
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.setErrorHandler(new ResponseErrorHandler() {
            @Override
            public boolean hasError(ClientHttpResponse response) throws IOException {
                return false;
            }

            @Override
            public void handleError(ClientHttpResponse response) throws IOException {

            }
        });
        return restTemplate;
    }

}

使用

@Slf4j
@RestController
public class TestController {

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private RestTemplate myRestTemplate;

}