OkHttp单例模式，GET请求和POST请求（全家桶）

我们在项目开发中，往往避免不了频繁的网络请求，为了更加节省资源和方便使用，这里简单的把OkHttp进行了简单的封装，以供参考，希望可以帮到你！！！ 

public class okHttpUtil {

    private static okHttpUtil okHttpUtil = null;
    private static OkHttpClient okHttpClient = null;

    public static okHttpUtil getInstance() {
        if (okHttpUtil == null) {
            synchronized (okHttpUtil.class) {
                if (okHttpUtil == null) {
                     okHttpUtil = new okHttpUtil();
                }
            }
        }
        return okHttpUtil;
    }

    /**
     * 单例模式
     * 封装okhttp
     * synchronized同步方法
     * @return
     */
    private static synchronized OkHttpClient getOkHttpClient() {
        if (okHttpClient == null) {
             okHttpClient = new OkHttpClient.Builder()
                    .readTimeout(60,TimeUnit.SECONDS)
                    .writeTimeout(60,TimeUnit.SECONDS)
                    .connectTimeout(60,TimeUnit.SECONDS)
                    .build();
        }
        return okHttpClient;
    }

    /**
     * GET请求
     */
    public void doGet(String url, Callback callback) {
        Request reQuest= new Request.Builder()
                .get()
                .url(url)
                .build();

        getOkHttpClient().newCall(reQuest).enqueue(callback);
    }

    /**
     * GET下载
     */
    public void doGetDownLoad(String url, Callback callback) {
        Request reQuest = new Request.Builder()
                .get()
                .url(url)
                .build();

        getOkHttpClient().newCall(reQuest).enqueue(callback);
    }

    /**
     * POST请求
     */
    public void doPost(String url, Map<String,String> params, Callback callback) {
        // 请求体
        FormBody.Builder builder = new FormBody.Builder();
        Set<String> keySet = params.keySet();
        for (String key : keySet){
            String value = params.get(key);
            builder.add(key,value);
        }
        FormBody formBody = builder.build();

        Request reQuest = new Request.Builder()
                .post(formBody)
                .url(url)
                .build();

        getOkHttpClient().newCall(reQuest).enqueue(callback);
    }

    /**
     * POST请求json
     */
    public void doPostJson(String url, String json, Callback callback) {
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json;charset=utf-8"), json);

        Request reQuest = new Request.Builder()
                .post(requestBody)
                .url(url)
                .build();

        getOkHttpClient().newCall(reQuest).enqueue(callback);
    }

    /**
     * POST上传文件
     */
    public void doPostUpload(String url,String path,Callback callback) {
        RequestBody requestBody = RequestBody.create(MediaType.parse("multipart/form-data"), new File(path));

        MultipartBody multipartBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("file", "file.jpg", requestBody)
                .build();

        Request reQuest = new Request.Builder()
                .post(multipartBody)
                .url(url)
                .build();

        getOkHttpClient().newCall(reQuest).enqueue(callback);
    }

}