【Java】RestTemplate设置header

开发中使用RestTemplate来进行访问，设置请求头的方法：

方法一：单独设置

public class TestRestTemplate {
    @Autowired
    private RestTemplate restTemplate;
    public void postObject(String id){
        String url="http://www.baidu.com";
        MultiValueMap<String, String> map = new LinkedMultiValueMap<>();
        map.add("id",id);
        HttpHeaders header = new HttpHeaders();
        // 需求需要传参为form-data格式
        header.setContentType(MediaType.MULTIPART_FORM_DATA);
        HttpEntity<MultiValueMap<String, String>> httpEntity = new HttpEntity<>(map, header);
        JSONObject response = restTemplate.postForObject(url, httpEntity, JSONObject.class);
    }
}

方法二：公共设置，使用interceptor拦截器设置

1.添加拦截器

public class HeaderRequestInterceptor implements ClientHttpRequestInterceptor {
 
    private final String headerName;
 
    private final String headerValue;
 
 
 
    public HeaderRequestInterceptor(String headerName, String headerValue) {
        this.headerName = headerName;
        this.headerValue = headerValue;
    }
 
    @Override
    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
        request.getHeaders().set(headerName, headerValue);
        return execution.execute(request, body);
    }

2.配置RestTemplate Bean

@Configuration
public class RestTemplateConfig {
 
    @Bean
    public RestTemplate restTemplate() {
        List<ClientHttpRequestInterceptor> interceptors = new ArrayList<>();
        interceptors.add(new HeaderRequestInterceptor("token", "123"));
 
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.setInterceptors(interceptors);
 
        return restTemplate;
    }
}