OkHttp框架读书总结笔记

原CSDN博客已弃用，文章会逐渐迁移过来。

转帖请注明本文出自weimeig的博客（http://blog.csdn.net/weimeig/article/details/78656734），请尊重他人的辛勤劳动成果，谢谢

一、添加依赖

build.gradle

dependencies {

compile 'com.squareup.okhttp3:okhttp:3.2.0'
compile 'com.squareup.okio:okio:1.7.0'

  }

权限:

<uses-permission android:name="android.permission.INTERNET" />

HelloOkhttp

import java.io.IOException;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * Created by Administrator on 2017/11/27.
 */

public class HelloOkhttp {
    public static void main(String [] args) throws IOException {
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder().
                url("http://www.baidu.com").build();
        try {
            Response response = client.newCall(request).execute();
            if (response.isSuccessful()) {
                System.out.println(response.body().string());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

QueryHttp

import java.io.IOException;

import okhttp3.HttpUrl;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * Created by Administrator on 2017/11/27.
 */
public class QueryHttp {

    public static void main(String args[]) {

        OkHttpClient client = new OkHttpClient();
        HttpUrl httpUrl = HttpUrl.parse("https://api.heweather.com/x3/weather").
                newBuilder().
                addQueryParameter("city", "beijing").
                addQueryParameter("key", "d17ce22ec5404ed883e1cfcaca0ecaa7").
                build();
        String url = httpUrl.toString();
        System.out.println(httpUrl.toString());
        Request request = new Request.Builder().url(url).build();
        try {
            Response response = client.newCall(request).execute();
            if (response.isSuccessful()) {
                System.out.println(response.body().string());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

HeadHttp

import java.io.IOException;

import okhttp3.Headers;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * Created by Administrator on 2017/11/27.
 */
/**
 * 请求头
 */

public class HeadHttp {
    public static void HadeHttp(String url){
        OkHttpClient client =new OkHttpClient();
        Request request = new Request.Builder().url(url).
                addHeader("User-Agent","from nate http").build();
        try {
            Response response = client.newCall(request).execute();
            if(response.isSuccessful()){
                Headers headers = response.headers();
                for(int i=0;i<headers.size();i++){
                    System.out.println(headers.name(i)+":"+headers.value(i));
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static void main(String []args){
        HadeHttp("http://www.baidu.com");
    }
}

同步和异步请求比较

import java.io.IOException;

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

/**
 * Created by Administrator on 2017/11/27.
 */

/**同步
 *
 */
public class AsyncHttp {
    public static void SendHttp(String url){
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder().url(url).build();
        try {
            Response response = client.newCall(request).execute();
            if (response.isSuccessful()){
                System.out.println(response.body().string());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     *异步
     *
     */
    public static void SendAsyncHttp(String url){
        System.out.println(Thread.currentThread().getId());
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder().url(url).build();

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

                }

                @Override
                public void onResponse(Call call, Response response) throws IOException {
                    if (response.isSuccessful()){
                        System.out.println(Thread.currentThread().getId());
                    }
                }
            });


    }
    public static void main(String [] args){

        SendAsyncHttp("http://www.baidu.com");
//        SendHttp("http://www.baidu.com");
    }
}