String encodedTitle = URLEncoder.encode(title, "UTF-8");
String encodedIntro = URLEncoder.encode(introduction, "UTF-8");

// 构造JSON参数字符串（已编码）
String jsonParam = String.format("{\"title\":\"%s\", \"introduction\":\"%s\"}",
    encodedTitle, encodedIntro);

// 构建请求实体
HttpEntity requestEntity = MultipartEntityBuilder.create()
    // 添加二进制文件
    .addBinaryBody("media", file)
    // 添加文本参数（已编码的JSON）
    .addTextBody("description", jsonParam)
    .build();
postRequest.setEntity(requestEntity);
CloseableHttpResponse response = httpClient.execute(postRequest);

 这样上传视频title会这样%E6%80%8E%E4%B9%88%E8%BF%98%E4%B8%8D%E8，