SpringBoot 发送 POST 请求 form-data 格式_springboot formdata post请求

记录一下，发送请求时，替换文件名的一种写法。

下面这个方法是 上传文件到企微。

public String uploadMedia(String key,String type,String filePath,String fileName) {
		byte[] fileToByte = FileUtil.getFileToByte(filePath);
		ByteArrayResource resource = new ByteArrayResource(fileToByte){
			@Override
			public String getFilename() {
				return fileName;
			}
		};
		String url = String.format("https://qyapi.weixin.qq.com/cgi-bin/webhook/upload_media?key=%s&type=%s",key,type);
		MultiValueMap<String, Object> formData = new LinkedMultiValueMap<>();
		formData.add("file",resource);
		HttpHeaders headers = new HttpHeaders();
		headers.setContentType(MediaType.MULTIPART_FORM_DATA);
		HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(formData, headers);
		ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class);
		return response.getBody();
	}