HttpURLConnection post json 数据接口请求

刚开始学习安卓学到post json数据到服务器这里，经过搜集资料整理了一下方法，在此做下备份

方法:

/**
 * post请求
 *
 * @param json 为Json字符串
 * @param uri 为接口名
 */
public static String postHTTP(String uri, String json) {
    HttpURLConnection httpURLConnection = null;
    String result = null;
    try {
        httpURLConnection = (HttpURLConnection) new URL(URL+uri).openConnection();
        httpURLConnection.setRequestMethod("POST");
        //Content-type字母区分大小写，特别注意
        httpURLConnection.setRequestProperty("Content-type", "application/json");
        httpURLConnection.setDoOutput(true);
        httpURLConnection.setUseCaches(false);
        httpURLConnection.setConnectTimeout(30000);
        httpURLConnection.connect();
	//获取输出流对象，把请求参数发送打服务器接口
        OutputStream outputStream = httpURLConnection.getOutputStream();
        outputStream.write(json.getBytes("utf-8"));
        outputStream.flush();
	//获取服务器返回数据流
        InputStream inputStream = httpURLConnection.getInputStream();
        if (httpURLConnection.getResponseCode() == 200) {
            // 内存流对象
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            byte[] data = new byte[1024];
            int len = 0;
            while ((len = inputStream.read(data)) != -1) {
                byteArrayOutputStream.write(data, 0, len);
            }
            result = new String(byteArrayOutputStream.toByteArray(), "utf-8");
        } else {
            //此处写入请求失败操作
        }
        inputStream.close();
        outputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return result;
}
l  调用：不能在UI线程里调用，需要子线程
try {
    JSONObject jsonObject = new JSONObject();
    jsonObject.put("userName", "1111");
    jsonObject.put("password", "1111");
    String text = PostHttpURLConnection.postHTTP("login", jsonObject.toString());
    if(text == null) return;
    JSONObject js = new JSONObject(text);
    ((EditText) findViewById(R.id.editText1)).setText(js.getString("m"));

    Toast.makeText(MainActivity.this, text, Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
    e.printStackTrace();
}

需要写入网络权限：