服务端上传文件到云存储分两步: 1、获取上传链接 2、上传文件 如官方说明所述https://developers.weixin.qq.com/miniprogram/dev/wxcloud/reference-http-api/storage/uploadFile.html 我在第二步时遇到报错 The body of your POST request is not well-formed multipart/form-data. 请大侠支招！ 代码如下 主文件 String fileName = path.getFileName().toString(); String cloudPath = "shenqitest/" + fileName; WxCloudUploadFileResult uploadResult = cloudService.uploadFile(this.env, cloudPath); System.out.println(uploadResult.toString()); Map<String, File> fileParams = new HashMap<>(); fileParams.put("file", path.toFile()); Map<String, String> otherParams = new HashMap<>(); otherParams.put("key", cloudPath); otherParams.put("Signature", uploadResult.getAuthorization()); otherParams.put("x-cos-security-token", uploadResult.getToken()); otherParams.put("x-cos-meta-fileid", uploadResult.getCosFileId()); // //Map<String, String> headerParams = new HashMap<>(); //headerParams.put("Content-Type", "multipart/form-data"); // 不加boundary会报错: The specified method is not allowed against this resource. String resp = HTTPUtils.uploadFile(uploadResult.getUrl(), fileParams, otherParams, null); 工具文件 public static String uploadFile(String url, Map<String, File> fileParams, Map<String, String> otherParams, Map<String, String> headerParams) { CloseableHttpClient httpClient = HttpClients.createDefault(); String result = ""; try { HttpPost httpPost = new HttpPost(url); //设置请求头 if (headerParams != null && headerParams.size() > 0) { for (Map.Entry<String, String> e : headerParams.entrySet()) { String value = e.getValue(); String key = e.getKey(); if (StringUtils.isNotBlank(value)) { httpPost.setHeader(key, value); } } } MultipartEntityBuilder builder = MultipartEntityBuilder.create(); builder.setCharset(StandardCharsets.UTF_8); //builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);//加上此行代码解决返回中文乱码问题 // 文件传输http请求头(multipart/form-data) if (fileParams != null && fileParams.size() > 0) { for (Map.Entry<String, File> e : fileParams.entrySet()) { String fileParamName = e.getKey(); File file = e.getValue(); if (file != null) { //String fileName = URLEncoder.encode(file.getName(), StandardCharsets.UTF_8); String fileName = file.getName(); //try (InputStream stream = new FileInputStream(file)) { // 请求时要用stream builder.addBinaryBody(fileParamName, new FileInputStream(file), ContentType.APPLICATION_OCTET_STREAM, fileName); //} } } } // 普通参数请求头(application/json) ContentType contentType = ContentType.create(ContentType.APPLICATION_JSON.getMimeType(), StandardCharsets.UTF_8); if (otherParams != null && otherParams.size() > 0) { for (Map.Entry<String, String> e : otherParams.entrySet()) { String value = e.getValue(); if (StringUtils.isNotBlank(value)) { builder.addTextBody(e.getKey(), value, contentType); } } } HttpEntity entity = builder.build(); httpPost.setEntity(entity); CloseableHttpResponse response = httpClient.execute(httpPost); HttpEntity responseEntity = response.getEntity(); if (responseEntity != null) { // 将响应内容转换为字符串 result = EntityUtils.toString(responseEntity, StandardCharsets.UTF_8); } } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } return result; } 要传的文件是jpeg，文件的ContentType试过APPLICATION_OCTET_STREAM、IMAGE_JPEG、MULTIPART_FORM_DATA、DEFAULT_BINARY，其它参数的ContentType试过DEFAULT_TEXT、MULTIPART_FORM_DATA、APPLICATION_JSON，都是一样的结果