OkHttp的基本使用——替代Apache HttpClient

缺乏、安全感 2021-06-24 15:58 473阅读 0赞

http是现在主流应用使用的网络请求方式, 用来交换数据和内容, 有效的使用HTTP可以使你的APP 变的更快和减少流量的使用

OkHttp 是一个很棒HTTP客户端:

*  支持SPDY, 可以合并多个到同一个主机的请求
 *   使用连接池技术减少请求的延迟(如果SPDY是可用的话)
 *   使用GZIP压缩减少传输的数据量
 *   缓存响应避免重复的网络请求

OkHttp可以替换Apache的HttpClient

OkHttp支持2.3和以上版本，对于java，需要jdk1.7 ，OkHttp需要依赖Okio包

下面上demo

1：使用get方式请求，获取响应

import java.io.IOException;
    import okhttp3.OkHttpClient;
    import okhttp3.Request;
    import okhttp3.Response;
    
    public class GetExample {
      OkHttpClient client = new OkHttpClient();
    
      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 void main(String[] args) throws IOException {
        GetExample example = new GetExample();
        String response = example.run("https://raw.github.com/square/okhttp/master/README.md");
        System.out.println(response);
      }
    }

2：使用post向服务器发送请求

import java.io.IOException;
    import okhttp3.MediaType;
    import okhttp3.OkHttpClient;
    import okhttp3.Request;
    import okhttp3.RequestBody;
    import okhttp3.Response;
    
    public class PostExample {
      public static final MediaType JSON
          = MediaType.parse("application/json; charset=utf-8");
    
      OkHttpClient client = new OkHttpClient();
    
      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();
        }
      }
    
      String bowlingJson(String player1, String player2) {
        return "{'winCondition':'HIGH_SCORE',"
            + "'name':'Bowling',"
            + "'round':4,"
            + "'lastSaved':1367702411696,"
            + "'dateStarted':1367702378785,"
            + "'players':["
            + "{'name':'" + player1 + "','history':[10,8,6,7,8],'color':-13388315,'total':39},"
            + "{'name':'" + player2 + "','history':[6,10,5,10,10],'color':-48060,'total':41}"
            + "]}";
      }
    
      public static void main(String[] args) throws IOException {
        PostExample example = new PostExample();
        String json = example.bowlingJson("Jesse", "Jake");
        String response = example.post("http://www.roundsapp.com/post", json);
        System.out.println(response);
      }
    }