OkHttpClient client=new OkHttpClient();

//一種：引數請求體
FormBody paramsBody=new FormBody.Builder()
        .add("id",currentPlan.getPlanId()+"")
        .add("name",currentPlan.getName())
        .add("volume",currentPlan.getVolume())
        .add("type",currentPlan.getType()+"")
        .add("mode",currentPlan
 
.getMode()+"")
        .build();


//二種：檔案請求體
MediaType type=MediaType.parse("application/octet-stream");//"text/xml;charset=utf-8"
File file=new File("/data/data/com.example.company/files/plan/plans.xml");
RequestBody fileBody=RequestBody.create(type,file);


//三種：混合引數和檔案請求
RequestBody multipartBody = new MultipartBody.Builder()
        .setType(MultipartBody.ALTERNATIVE
 
)

//一樣的效果        .addPart(Headers.of(
            "Content-Disposition",
            "form-data; name=\"params\"")
                ,paramsBody)
        .addPart(Headers.of(
            "Content-Disposition",
            "form-data; name=\"file\"; filename=\"plans.xml\"")
                , fileBody)
        //一樣的效果
 
        /*.addFormDataPart("id",currentPlan.getPlanId()+"")
        .addFormDataPart("name",currentPlan.getName())
        .addFormDataPart("volume",currentPlan.getVolume())
        .addFormDataPart("type",currentPlan.getType()+"")
        .addFormDataPart("mode",currentPlan.getMode()+"")
        .addFormDataPart("params","plans.xml",fileBody)*/
.build();



 Request request=new Request.Builder().url("http://192.168.1.121:8080/Server/Service")
        .addHeader("User-Agent","android")
        .header("Content-Type","text/html; charset=utf-8;")
        .post(multipartBody)//傳引數、檔案或者混合，改一下就行請求體就行
        .build();

client.newCall(request).enqueue(new Callback() {
    @Override
public void onFailure(Call call, IOException e) {

    }

    @Override
public void onResponse(Call call, Response response) throws IOException {
        
        Log.i("xxx","1、連線的訊息"+response.message());
        if(response.isSuccessful()){
            Log.i("xxx","2、連線成功獲取的內容"+response.body().string());
        }
    }
});