OkHttp使用

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转载自：http://blog.csdn.net/qq_26562641/article/details/53639982

OKHttp是基于Http协议上的网络通讯，相较于HttpClinent，OKHttp就比较轻量级。

HTTP GET

    private final static OkHttpClient client = new OkHttpClient();    private static void get() throws Exception {        String url = "http://www.baidu.com";        Request request = new Request.Builder()                .url(url)                .build();        Response response = client.newCall(request).execute();        if (response.isSuccessful()) {            String body = response.body().string();            System.out.println(body);        } else {            throw new IOException("Unexpected code " + response);        }    }

Request是OkHttp中访问的请求，Response即OkHttp中的响应，response.body()返回ResponseBody类，可以方便的获取body部分string，也可以通过byteStream()获取InputStream。

HTTP POST

    private final static OkHttpClient client =            new OkHttpClient.Builder()                    .connectTimeout(30, TimeUnit.SECONDS)                    .build();    private static void post() throws Exception {        MediaType JSONTYPE = MediaType.parse("application/json; charset=utf-8");        String json = "";        String url = "";        RequestBody body = RequestBody.create(JSONTYPE, json);        Request request = new Request.Builder()                .url(url)                .post(body)                .build();        Response response = client.newCall(request).execute();        if (response.isSuccessful()) {            String bodyStr = response.body().string();            System.out.println(bodyStr);        } else {            throw new IOException("Unexpected code " + response);        }    }

上面例子通过MediaType设置可以提交Json数据，也可以发送键值对数据：

RequestBody formBody = new FormBody.Builder()        .add("platform", "android")        .add("name", "bug")        .add("subject", "XXXXXXXXXXXXXXX")        .build();Request request = new Request.Builder()        .url(url)        .post(formBody)        .build();Response response = client.newCall(request).execute();

关于OkHttp的更多用法，参考：http://www.cnblogs.com/ct2011/p/3997368.html

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