okhttp上传文件

OkHttpClient okHttpClient=new OkHttpClient();MultipartBody.Builder mult=new MultipartBody.Builder();mult.setType(MultipartBody.FORM);mult.addFormDataPart("uid", String.valueOf(uid));mult.addFormDataPart("file",file.getName(), RequestBody.create(MediaType.parse("application/octet-stream"),file));MultipartBody build = mult.build();