使用HttpGet,closeableHttpClient,HttpClients,CloseableHttpResponse实现本地访问web服务器

一、架包

httpclient-4.4.1.jar  httpcore-4.4.1.jar   httpmime-4.2.jar

二、例子

String url="http://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

HttpGet httpGet = new HttpGet(url);
        CloseableHttpClient httpclient = HttpClients.createDefault();
        CloseableHttpResponse response = httpclient.execute(httpGet);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != 200) {
            httpGet.abort();
            throw new RuntimeException("HttpClient,error status code :" + statusCode);
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        if (entity != null) {
            result = EntityUtils.toString(entity, "utf-8");
            EntityUtils.consume(entity);
            response.close();
            System.out.println(result);
        }

三、使用多线程以及CountDownLatch实现共同访问

public class Test {
public static void main(String[] args) {
    CountDownLatch latch=new CountDownLatch(1);
    String url="http://test.meyki.net:9080/apidev/v3/goods/goodsList/eyJwYWdlU2l6ZSI6IjIwIiwib3MiOiJpb3MiLCJzaG9wSWQiOiI1MTU2MjNmNGVlOGU0OGIxYmU3MmY2MGFiOTcxZTExOSIsInVzZXJJZCI6IjIyNTg0MDVmYTU5ODRlOTViNWI2NTI4ZTM3YmExODBjIiwicGFnZU5vIjoiMSIsImlzU2hlbHZlcyI6IjEiLCJ2Y29kZSI6IjE0MCIsInRhZyI6IjEifQ==";
    for(int i=0;i<=15;i++){
        Thread thread=new Thread(new Mythread(latch,url));
        thread.start();
    }
    latch.countDown();
}
}

package com.meyki.common;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;

import org.apache.http.HttpEntity;
import org.apache.http.ParseException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

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

public class Mythread  implements Runnable{
    private final CountDownLatch startSignal;
    private  String url;
    public Mythread(CountDownLatch  startSignal,String url){
        super();
        this.startSignal=startSignal;
        this.url=url;
    }
    @Override
    public void run() {
        try {
            startSignal.await();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            dowork();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    private void dowork() throws ParseException, IOException {
        
        //使用HttpGet,closeableHttpClient,HttpClients,CloseableHttpResponse在本地访问
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpClient httpclient = HttpClients.createDefault();
        CloseableHttpResponse response = httpclient.execute(httpGet);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != 200) {
            httpGet.abort();
            throw new RuntimeException("HttpClient,error status code :" + statusCode);
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        if (entity != null) {
            result = EntityUtils.toString(entity, "utf-8");
            EntityUtils.consume(entity);
            response.close();
            System.out.println(result);
        }
        //使用OkhttpClient
        /*OkHttpClient   httpClient=new OkHttpClient();
        Request request=new Request.Builder()
                        .url(url)
                        .build();
        //得到response对象
        Response response=httpClient.newCall(request).execute();
        if(response.isSuccessful()){
            String result=response.body().string();
            System.out.println(response.code());
            System.out.println(response.message());
            System.out.println(result);
        }*/
    }
        
}