RestTemplate 设置 header

最新推荐文章于 2024-12-10 16:44:16 发布

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原文链接：https://www.cnblogs.com/z-Z-/p/15932021.html

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#spring boot

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;

    /**
     * post 请求携带请求头和参数
     *
     * @param id
     */
    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);
    }

    /**
     * get 请求携带请求头
     */
    public void getForEntity() {
        String url = "http://www.baidu.com";
        HttpHeaders header = new HttpHeaders();
        // 需求需要传参为form-data格式
        header.setContentType(MediaType.MULTIPART_FORM_DATA);
        HttpEntity httpEntity = new HttpEntity<>(header);
        // 只有请求头 不包含参数
        ResponseEntity<Map> exchange = restTemplate.exchange(url, HttpMethod.GET, httpEntity, Map.class);
        Map body = exchange.getBody();
    }

}

方法二：公共设置，使用interceptor拦截器设置

适用于发送多个请求

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

可自定义配置参数

 @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;
        }
    }

3.使用RestTemplate Bean

@Autowired
private RestTemplate restTemplate;