HttpClient pool连接池

场景：
高并发情况下，为了提高http请求效率，加入http 连接池，减少3次握手次数，提高请求效率

import org.apache.http.*;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.SSLException;
import javax.net.ssl.SSLHandshakeException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.UnsupportedEncodingException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class HttpClientsUtil {

static final int timeOut = 10 * 1000;

private static CloseableHttpClient httpClient = null;

private final static Object syncLock = new Object();

private static void config(HttpRequestBase httpRequestBase) {
    // 设置Header等
    // httpRequestBase.setHeader("User-Agent", "Mozilla/5.0");
    // httpRequestBase
    // .setHeader("Accept",
    // "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
    // httpRequestBase.setHeader("Accept-Language",
    // "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");// "en-US,en;q=0.5");
    // httpRequestBase.setHeader("Accept-Charset",
    // "ISO-8859-1,utf-8,gbk,gb2312;q=0.7,*;q=0.7");

    // 配置请求的超时设置
    RequestConfig requestConfig = RequestConfig.custom()
            .setConnectionRequestTimeout(timeOut)
            .setConnectTimeout(timeOut).setSocketTimeout(timeOut).build();
    httpRequestBase.setConfig(requestConfig);
}

/**
 * 获取HttpClient对象
 * @param url
 * @return
 */
public static CloseableHttpClient getHttpClient(String url) {
    String hostname = url.split("/")[2];
    int port = 80;
    if (hostname.contains(":")) {
        String[] arr = hostname.split(":");
        hostname = arr[0];
        port = Integer.parseInt(arr[1]);
    }
    if (httpClient == null) {
        synchronized (syncLock) {
            if (httpClient == null) {
                httpClient = createHttpClient(200, 40, 100, hostname, port);
            }
        }
    }
    return httpClient;
}

/**
 * 创建HttpClient对象
 * @param maxTotal
 * @param maxPerRoute
 * @param maxRoute
 * @param hostname
 * @param port
 * @return
 */
public static CloseableHttpClient createHttpClient(int maxTotal,
                                                   int maxPerRoute, int maxRoute, String hostname, int port) {
    ConnectionSocketFactory plainsf = PlainConnectionSocketFactory
            .getSocketFactory();
    LayeredConnectionSocketFactory sslsf = SSLConnectionSocketFactory
            .getSocketFactory();
    Registry<ConnectionSocketFactory> registry = RegistryBuilder
            .<ConnectionSocketFactory> create().register("http", plainsf)
            .register("https", sslsf).build();
    PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(
            registry);
    // 将最大连接数增加
    cm.setMaxTotal(maxTotal);
    // 将每个路由基础的连接增加
    cm.setDefaultMaxPerRoute(maxPerRoute);
    HttpHost httpHost = new HttpHost(hostname, port);
    // 将目标主机的最大连接数增加
    cm.setMaxPerRoute(new HttpRoute(httpHost), maxRoute);

    // 请求重试处理
    HttpRequestRetryHandler httpRequestRetryHandler = new HttpRequestRetryHandler() {
        public boolean retryRequest(IOException exception,
                                    int executionCount, HttpContext context) {
            if (executionCount >= 5) {// 如果已经重试了5次，就放弃
                return false;
            }
            if (exception instanceof NoHttpResponseException) {// 如果服务器丢掉了连接，那么就重试
                return true;
            }
            if (exception instanceof SSLHandshakeException) {// 不要重试SSL握手异常
                return false;
            }
            if (exception instanceof InterruptedIOException) {// 超时
                return false;
            }
            if (exception instanceof UnknownHostException) {// 目标服务器不可达
                return false;
            }
            if (exception instanceof ConnectTimeoutException) {// 连接被拒绝
                return false;
            }
            if (exception instanceof SSLException) {// SSL握手异常
                return false;
            }

            HttpClientContext clientContext = HttpClientContext
                    .adapt(context);
            HttpRequest request = clientContext.getRequest();
            // 如果请求是幂等的，就再次尝试
            if (!(request instanceof HttpEntityEnclosingRequest)) {
                return true;
            }
            return false;
        }
    };

    CloseableHttpClient httpClient = HttpClients.custom()
            .setConnectionManager(cm)
            .setRetryHandler(httpRequestRetryHandler).build();

    return httpClient;
}

private static void setPostParams(HttpPost httpost,
                                  Map<String, Object> params) {
    List<NameValuePair> nvps = new ArrayList<NameValuePair>();
    Set<String> keySet = params.keySet();
    for (String key : keySet) {
        nvps.add(new BasicNameValuePair(key, params.get(key).toString()));
    }
    try {
        httpost.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
}

/**
 * GET请求URL获取内容
 * @param url
 * @param params
 * @return
 * @throws IOException
 */
public static String post(String url, Map<String, Object> params) throws IOException {
    HttpPost httppost = new HttpPost(url);
    config(httppost);
    setPostParams(httppost, params);
    CloseableHttpResponse response = null;
    try {
        response = getHttpClient(url).execute(httppost,
                HttpClientContext.create());
        HttpEntity entity = response.getEntity();
        String result = EntityUtils.toString(entity, "utf-8");
        EntityUtils.consume(entity);
        return result;
    } catch (Exception e) {
        throw e;
    } finally {
        try {
            if (response != null)
                response.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

/**
 * GET请求URL获取内容
 * @param url
 * @return
 */
public static String get(String url) {
    HttpGet httpget = new HttpGet(url);
    config(httpget);
    CloseableHttpResponse response = null;
    try {
        response = getHttpClient(url).execute(httpget,
                HttpClientContext.create());
        HttpEntity entity = response.getEntity();
        String result = EntityUtils.toString(entity, "utf-8");
        EntityUtils.consume(entity);
        return result;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (response != null)
                response.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return null;
}

public static void main(String[] args) {
    // URL列表数组
    String[] urisToGet = { "http://api.t.sina.com.cn/short_url/shorten.json?source=1146431898&url_long=https://xl.sinaif.com/smsType=1%26schemes=100000000000%26eventcode=X001%26eventday=100000000000%26eventcreatetime=150000000000000%26accountid=10000000000000000002%26expecttime=150000000000000%26codeType=1"
            };

    long start = System.currentTimeMillis();
    try {
        int pagecount = urisToGet.length;
        ExecutorService executors = Executors.newFixedThreadPool(pagecount);
        CountDownLatch countDownLatch = new CountDownLatch(pagecount);
        for (int i = 0; i < pagecount; i++) {
//                HttpGet httpget = new HttpGet(urisToGet[i]);
//                config(httpget);
                // 启动线程抓取
                executors
                        .execute(new GetRunnable(urisToGet[i], countDownLatch));
            }
            countDownLatch.await();
            executors.shutdown();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            System.out.println("线程" + Thread.currentThread().getName() + ","
                    + System.currentTimeMillis() + ", 所有线程已完成，开始进入下一步！");
        }

    long end = System.currentTimeMillis();
    System.out.println("consume -> " + (end - start)+" ms");

   // 不用http 连接池 需要花费时间
    Long stime = System.currentTimeMillis();
    for (int i = 0; i < urisToGet.length; i++) {
        String url = urisToGet[i];
        HttpClientUtil.doGet(url,null);
    }
    System.out.println("consume -> " + (System.currentTimeMillis() - stime)+" ms");

}

static class GetRunnable implements Runnable {
    private CountDownLatch countDownLatch;
    private String url;

    public GetRunnable(String url, CountDownLatch countDownLatch) {
        this.url = url;
        this.countDownLatch = countDownLatch;
    }

    @Override
    public void run() {
        try {
            System.out.println(HttpClientsUtil.get(url));
        } finally {
            countDownLatch.countDown();
        }
    }
}
}











常规httpclientUtil

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

/**
 * 基于 httpclient 4.3.1版本的 http工具类
 */
public class HttpClientUtil {

private static final CloseableHttpClient httpClient;
public static final String CHARSET = "UTF-8";

static {
    RequestConfig config = RequestConfig.custom().setConnectTimeout(60000).setSocketTimeout(15000).build();
    httpClient = HttpClientBuilder.create().setDefaultRequestConfig(config).build();
}

public static String doGet(String url, Map<String, String> params){
    return doGet(url, params,CHARSET);
}
public static String doPost(String url, Map<String, String> params){
    return doPost(url, params,CHARSET);
}
/**
 * HTTP Get 获取内容
 * @param url  请求的url地址 ?之前的地址
 * @param params 请求的参数
 * @param charset    编码格式
 * @return    页面内容
 */
public static String doGet(String url,Map<String,String> params,String charset){
    if(StringUtils.isBlank(url)){
        return null;
    }
    try {
        if(params != null && !params.isEmpty()){
            List<NameValuePair> pairs = new ArrayList<NameValuePair>(params.size());
            for(Map.Entry<String,String> entry : params.entrySet()){
                String value = entry.getValue();
                if(value != null){
                    pairs.add(new BasicNameValuePair(entry.getKey(),value));
                }
            }
            url += "?" + EntityUtils.toString(new UrlEncodedFormEntity(pairs, charset));
        }
        HttpGet httpGet = new HttpGet(url);
        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();
        return result;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

/**
 * HTTP Post 获取内容
 * @param url  请求的url地址 ?之前的地址
 * @param params 请求的参数
 * @param charset    编码格式
 * @return    页面内容
 */
public static String doPost(String url,Map<String,String> params,String charset){
    if(StringUtils.isBlank(url)){
        return null;
    }
    try {
        List<NameValuePair> pairs = null;
        if(params != null && !params.isEmpty()){
            pairs = new ArrayList<NameValuePair>(params.size());
            for(Map.Entry<String,String> entry : params.entrySet()){
                String value = entry.getValue();
                if(value != null){
                    pairs.add(new BasicNameValuePair(entry.getKey(),value));
                }
            }
        }
        HttpPost httpPost = new HttpPost(url);
        if(pairs != null && pairs.size() > 0){
            httpPost.setEntity(new UrlEncodedFormEntity(pairs,CHARSET));
        }
        CloseableHttpResponse response = httpClient.execute(httpPost);
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != 200) {
            httpPost.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();
        return result;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

public static byte[] doGetAndReturnByteArray(String url){
    if(StringUtils.isBlank(url)){
        return null;
    }
    try {
        HttpGet httpGet = new HttpGet(url);
        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();
        return inputStream2ByteArray(entity.getContent());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

private static byte[] inputStream2ByteArray(InputStream in) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream(262144);
    byte[] temp = new byte[262144];
    int i = -1;
    while ((i = in.read(temp)) != -1) {
        baos.write(temp, 0, i);
    }
    return baos.toByteArray();
}

public static String inputStream2String(InputStream in) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream(262144);
    byte[] temp = new byte[262144];
    int i = -1;
    while ((i = in.read(temp)) != -1) {
        baos.write(temp, 0, i);
    }
    return baos.toString();
}

public static void main(String []args){
    String getData = doGet("http://www.oschina.net/",null);
    System.out.println(getData);
    System.out.println("----------------------分割线-----------------------");
    String postData = doPost("http://www.oschina.net/",null);
    System.out.println(postData);
}

}