下图是我的所有测试接口，包含两个表单提交接口和一个Rest接口：

我是用的Http请求工具是Spring自带的RestTemplate。

请求的方法如下：

三个请求分别对应三个接口，在此记录下。

下载文件，获取文件字节流：

RestTemplate restTemplate = new RestTemplate();HttpHeaders headers = new HttpHeaders();ResponseEntity<byte[]> entity = restTemplate.exchange("http://ip:port/test.doc", HttpMethod.GET,new HttpEntity<>(headers), byte[].class);byte[] body = entity.getBody();

multipart/form-data 文件上传：

RestTemplate restTemplate = new RestTemplate();String url = "http://127.0.0.1:8080/file/upload"MultiValueMap<String, Object> multiValueMap = new LinkedMultiValueMap<>();// 设置multi/form-data文件multiValueMap.add("file", new FileSystemResource("D:/1.mp3"));multiValueMap.add("name", "测试材料");// http请求String response = restTemplate.postForObject(url, multiValueMap, String.class);

补充知识：restTemplate发送get与post请求 并且带参数

我就废话不多说了，大家还是直接看代码吧~

@Test public void test() throws Exception{ String url = "http://localhost:8081/aa"; //headers HttpHeaders requestHeaders = new HttpHeaders(); requestHeaders.add("api-version", "1.0"); //body MultiValueMap<String, String> requestBody = new LinkedMultiValueMap<>(); requestBody.add("id", "1"); //HttpEntity HttpEntity<MultiValueMap> requestEntity = new HttpEntity<MultiValueMap>(requestBody, requestHeaders); //post ResponseEntity<String> responseEntity = restTemplate.postForEntity(url, requestEntity, String.class); System.out.println(responseEntity.getBody()); ResponseEntity<String> responseEntity1 = restTemplate.exchange("http://172.26.186.206:8080/hive/list/schemas?appid=admin_test", HttpMethod.GET, requestEntity, String.class); System.out.println(responseEntity1.getBody()); }

restTemplate的注解如下：

@Componentpublic class MyConfig { @Autowired RestTemplateBuilder builder; @Bean public RestTemplate restTemplate() { return builder.build(); }}

发送get请求

@Test public void testCheck() { String url = "http://172.26.186.206:8080/syncsql/process"; String timeStramp = String.valueOf(System.currentTimeMillis()); HttpHeaders headers = new HttpHeaders(); headers.add("appid", ""); headers.add("sign", sign(null, null,null)); headers.add("timestamp", timeStramp); JSONObject jsonObj = new JSONObject(); HttpEntity<String> formEntity = new HttpEntity<String>(null, headers); Map<String, Object> maps = new HashMap<String, Object>(); maps.put("sql", "select * from jingfen.d_user_city"); maps.put("type", 1); maps.put("account", "admin_test"); ResponseEntity<String> exchange = restTemplate.exchange(url + "?sql={sql}&type={type}&account={account}", HttpMethod.GET, formEntity, String.class, maps); String body = exchange.getBody(); LOGGER.info("{}", body); }

以上这篇RestTemplate发送get和post请求,下载文件的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。