[Java知识库]自定义RestTemplate--通过拦截器实现

package com.ebay.ecg.it.makemodelimporter.configuration;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpRequest;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.web.client.RestTemplate;

import java.io.IOException;
import java.util.Collections;

@Configuration
public class RestTemplateConfiguration {


    @Bean
    public RestTemplate restTemplate() {
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.setInterceptors(Collections.singletonList(new JsonMimeInterceptor()));

        return restTemplate;
    }


    /**
     * Interceptor that automatically adds the Content-Type: application/json to every {@link RestTemplate} http call.
     */
    public class JsonMimeInterceptor implements ClientHttpRequestInterceptor {
        @Override
        public ClientHttpResponse intercept(HttpRequest request, byte[] body,
                                            ClientHttpRequestExecution execution) throws IOException {
            HttpHeaders headers = request.getHeaders();
            headers.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
            return execution.execute(request, body);
        }
    }
}