okhttpclient的用例与介绍

 OkHttpClient client = new OkHttpClient();
 //获取URL
 //访问URL并获取该网站返回过来的字符串
 String run(String url) throws IOException {
   Request request = new Request.Builder()
       .url(url)
       .build();
 ?
   try (Response response = client.newCall(request).execute()) {
     return response.body().string();
   }
 }
 

 public static final MediaType JSON
     = MediaType.get("application/json; charset=utf-8");
 ?
 OkHttpClient client = new OkHttpClient();
 //发送到服务器
 //通过build一个request 并将需要的参数封装到body 访问url,执行client.newCall(request).execute(),得到返回值,一般是一个json格式的字符串,当然也可以自己选择它的返回数据格式!
 String post(String url, String json) throws IOException {
   RequestBody body = RequestBody.create(json, JSON);
   Request request = new Request.Builder()
       .url(url)
       .post(body)
       .build();
   try (Response response = client.newCall(request).execute()) {
     return response.body().string();
   }
 }