/**
 * post方式二：stirng型別引數和上傳檔案引數
 */
public void uploadFile(Map<String, Object> params) {//標註 集合必須包含 url 
    //post請求方式二：multipart/form-data(不僅能夠上傳string型別的引數，還可以上傳檔案（流的形式，file）)
OkHttpClient okHttpClient1 = new OkHttpClient();//推薦使用多執行緒
MultipartBody.Builder builder1 = new MultipartBody.Builder();//構建者模式
 
builder1.setType(MultipartBody.FORM);//傳輸型別
for (Map.Entry<String, Object> stringObjectEntry : params.entrySet()) {//沒有判空
String key = stringObjectEntry.getKey();
        Object value = stringObjectEntry.getValue();
        if (value instanceof File) {//如果請求的值是檔案
File file = (File) value;
            //MediaType.parse("application/octet-stream")以二進位制的形式上傳檔案                                        
 
builder1.addFormDataPart("jokeFiles", ((File) value).getName(), RequestBody.create(MediaType.parse("application/octet-stream"), file));
        } else {//如果請求的值是string型別
if(!"url".equals(key)){
                builder1.addFormDataPart(key, value.toString());
            }
        }
    }
    //進行請求
Request request1 = new 
 
Request.Builder().post(builder1.build()).url((String) params.get("url")).build();
    okHttpClient1.newCall(request1).enqueue(new Callback() {
        @Override
public void onFailure(okhttp3.Call call, IOException e) {

        }

        @Override
public void onResponse(okhttp3.Call call, Response response) throws IOException {

            if (response.isSuccessful()){//200-300
}
        }
    });