支持post,get请求（http,https）的HttpClientUtils

package com.lilin.utils;

import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
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;

/**
*
* @author lilin
*
*/
public class HttpClientUtils {

public static final int connTimeout = 10000;
public static final int readTimeout = 10000;
public static final String charset = "UTF-8";
private static HttpClient client = null;

static {
// 创建连接池
// 降低延迟：如果不采用连接池，每次连接发起Http请求的时候都会重新建立TCP连接(经历3次握手)，用完就会关闭连接(4次挥手)，如果采用连接池则减少了这部分时间损耗，别小看这几次握手，本人经过测试发现，基本上3倍的时间延迟
// 支持更大的并发：如果不采用连接池，每次连接都会打开一个端口，在大并发的情况下系统的端口资源很快就会被用完，导致无法建立新的连接
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
// 设置整个连接池最大连接数 根据自己的场景决定
cm.setMaxTotal(127);
// 设置每个路由上的默认连接个数
cm.setDefaultMaxPerRoute(127);
client = HttpClients.custom().setConnectionManager(cm).build();
}

/**
* 创建 SSL连接
*
* @return
* @throws GeneralSecurityException
*/
private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {
try {
SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
}).build();

SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {

@Override
public boolean verify(String arg0, SSLSession arg1) {
return true;
}

@Override
public void verify(String host, SSLSocket ssl) throws IOException {
}

@Override
public void verify(String host, X509Certificate cert) throws SSLException {
}

@Override
public void verify(String host, String[] cns, String[] subjectAlts) throws SSLException {
}

});

return HttpClients.custom().setSSLSocketFactory(sslsf).build();

} catch (GeneralSecurityException e) {
throw e;
}
}

public static String get(String url) throws Exception {
return get(url, charset, null, null);
}

public static String get(String url, String charset) throws Exception {
return get(url, charset, connTimeout, readTimeout);
}

public static String postParameters(String url, String parameterStr)
throws ConnectTimeoutException, SocketTimeoutException, Exception {
return post(url, parameterStr, "application/x-www-form-urlencoded", charset, connTimeout, readTimeout);
}

public static String postParameters(String url, St
c8ac
ring parameterStr, String charset, Integer connTimeout,
Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception {
return post(url, parameterStr, "application/x-www-form-urlencoded", charset, connTimeout, readTimeout);
}

/**
* 发送一个 GET 请求
*
* @param url
* @param charset
* @param connTimeout
*            建立链接超时时间,毫秒.
* @param readTimeout
*            响应超时时间,毫秒.
* @return
* @throws ConnectTimeoutException
*             建立链接超时
* @throws SocketTimeoutException
*             响应超时
* @throws Exception
*/
public static String get(String url, String charset, Integer connTimeout, Integer readTimeout)
throws ConnectTimeoutException, SocketTimeoutException, Exception {

HttpClient client = null;
HttpGet get = new HttpGet(url);
String result = "";
try {
// 设置参数
Builder customReqConf = RequestConfig.custom();
if (connTimeout != null) {
customReqConf.setConnectTimeout(connTimeout);
}
if (readTimeout != null) {
customReqConf.setSocketTimeout(readTimeout);
}
get.setConfig(customReqConf.build());

HttpResponse res = null;

if (url.startsWith("https")) {
// 执行 Https 请求.
client = createSSLInsecureClient();
res = client.execute(get);
} else {
// 执行 Http 请求.
client = HttpClientUtils.client;
res = client.execute(get);
}

result = IOUtils.toString(res.getEntity().getContent(), charset);

} finally {
get.releaseConnection();
if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {
((CloseableHttpClient) client).close();
}
}
return result;
}

/**
* 发送一个 Post 请求, 使用指定的字符集编码.
*
* @param url
* @param body
*            RequestBody
* @param mimeType
*            例如 application/xml "application/x-www-form-urlencoded"
*            a=1&b=2&c=3
* @param charset
*            编码
* @param connTimeout
*            建立链接超时时间,毫秒.
* @param readTimeout
*            响应超时时间,毫秒.
* @return ResponseBody, 使用指定的字符集编码.
* @throws ConnectTimeoutException
*             建立链接超时异常
* @throws SocketTimeoutException
*             响应超时
* @throws Exception
*/
public static String post(String url, String body, String mimeType, String charset, Integer connTimeout,
Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception {
HttpClient client = null;
HttpPost post = new HttpPost(url);
String result = "";
try {
if (StringUtils.isNotBlank(body)) {
HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));
post.setEntity(entity);
}
// 设置参数
Builder customReqConf = RequestConfig.custom();
if (connTimeout != null) {
customReqConf.setConnectTimeout(connTimeout);
}
if (readTimeout != null) {
customReqConf.setSocketTimeout(readTimeout);
}
post.setConfig(customReqConf.build());

HttpResponse res;
if (url.startsWith("https")) {
// 执行 Https 请求.
client = createSSLInsecureClient();
res = client.execute(post);
} else {
// 执行 Http 请求.
client = HttpClientUtils.client;
res = client.execute(post);
}
result = IOUtils.toString(res.getEntity().getContent(), charset);
} finally {
post.releaseConnection();
if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {
((CloseableHttpClient) client).close();
}
}
return result;
}

public static void main(String[] args) {
try {
String str = get("http://www.csdn.net");
System.out.println(str);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}