网络编程最佳实践一

HttpUtil.java

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import okhttp3.OkHttpClient;
import okhttp3.Request;

/**
 * Created by 王德强 on 2017/7/25.
 */

public class HttpUtil{
    public static void sendHttpRequest(final String address,final HttpCallbackListener listener){
        new Thread(new Runnable() {
            @Override
            public void run() {
                HttpURLConnection connection = null;
                try {
                    URL url = new URL(address);
                    connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setReadTimeout(8000);
                    connection.setConnectTimeout(8000);
                    connection.setDoOutput(true);
                    connection.setDoInput(true);
                    InputStream in = connection.getInputStream();
                    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                    StringBuilder response = new StringBuilder();
                    String line;
                    while ((line=reader.readLine())!=null){
                        response.append(line);
                    }
                    if(listener!=null){
                        listener.onFinish(response.toString());
                    }
                } catch (Exception e) {
                    if(listener!=null){
                        listener.onError(e);
                    }
                }finally {
                    if(connection!=null){
                        connection.disconnect();
                    }
                }
            }
        }).start();
    }

回调机制 接口
HttpCallbackListener.interfac

interface HttpCallbackListener {
    void onFinish(String response);
    void onError(Exception e);
}

以后每当需要发起一条Http请求的时候就可以这样写:

String address = "http://www.baidu.com";
String response = HttpUtil.sendHttpRequest(address);