HttpUrlConnection及OkHttp使用备忘

package cn.johnyu.myapplication;

import org.jetbrains.annotations.NotNull;
import org.json.JSONObject;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class ExampleUnitTest {
    String url="http://47.95.10.109:8002/albums";
    
    @Test
    public void testPostWithOkHttp() throws Exception{
        //数据准备
        JSONObject obj1=new JSONObject();
        obj1.put("albumName","tomli");
        obj1.put("price",45);
        obj1.put("count",3);


        OkHttpClient client = new OkHttpClient();

        MediaType mediaType = MediaType
                .parse("application/json; charset=utf-8");


        RequestBody body=RequestBody.create(obj1.toString(),mediaType);

        Request request = new Request.Builder()
                .post(body)
                .url(url)
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {

            }

            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                String s=response.body().string();
                System.out.println(s);
            }
        });

        Thread.sleep(3000);

    }

    @Test
    public void testPost() throws Exception{
        //数据准备
        JSONObject obj1=new JSONObject();
        obj1.put("albumName","johnyu");
        obj1.put("price",45);
        obj1.put("count",3);


        //post请求
        HttpURLConnection connection=(HttpURLConnection) new URL(url).openConnection();
        connection.setDoOutput(true);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type","application/json");
        OutputStream outputStream=connection.getOutputStream();

        outputStream.write(obj1.toString().getBytes());
        outputStream.flush();
        //请求在这里发送
        connection.connect();
        InputStream inputStream= connection.getInputStream();
        int len=connection.getContentLength();
        byte[] buf=new byte[len];
        inputStream.read(buf);
        inputStream.close();
        connection.disconnect();

//      测试抓取回来的数据
        String info=new String(buf);
        System.out.println(info);
        JSONObject obj=new JSONObject(info);
        String name=(String)obj.get("albumName");
        System.out.println(name);

    }
}