OkHttp（post上传文件）

File file = new File(Environment.getExternalStorageDirectory(), "dd.mp4");

if (!file.exists()) {

Toast.makeText(MainActivity.this, "文件不存在", Toast.LENGTH_SHORT).show();

} else {

RequestBody fileBody = RequestBody.create(MediaType.parse(TYPE), file);

RequestBody requestBody = new MultipartBody.Builder().addFormDataPart("filename", file.getName(), fileBody).build();

Request requestPostFile = new Request.Builder()

.url("http://10.11.64.50/upload/UploadServlet")

.post(requestBody)

.build();

client.newCall(requestPostFile).enqueue(new Callback() {

@Override

public void onFailure(Call call, IOException e) {

}

@Override

public void onResponse(Call call, final Response response) throws IOException {

runOnUiThread(new Runnable() {

@Override

public void run() {

tvShow.setText(response.toString());

}

});

}

});

}