java封装httpClient工具（支持http和https，包含get和post请求）

网上有关方法非常多，但相对较零散，有些只支持http或https中的一种，或者只有get或post中的一种。以下对httpclient工具做了比较全面的封装，支持http和https，包含get和post请求。

maven导入的jar包有：

<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.5</version>
</dependency>
<!--阿里 FastJson依赖 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.37</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpasyncclient</artifactId>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
</dependency>
代码：

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
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 javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;

import org.apache.commons.io.IOUtils;
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.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.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
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;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.core.ServiceException; //自定义的一个异常类。

public class HttpsUtils {
private static PoolingHttpClientConnectionManager connMgr;
private static RequestConfig requestConfig;
private static final int MAX_TIMEOUT = 7000;

private static final Logger logger = LoggerFactory.getLogger(HttpsUtils.class);

static {
// 设置连接池
connMgr = new PoolingHttpClientConnectionManager();
// 设置连接池大小
connMgr.setMaxTotal(100);
connMgr.setDefaultMaxPerRoute(connMgr.getMaxTotal());
// Validate connections after 1 sec of inactivity
connMgr.setValidateAfterInactivity(1000);
RequestConfig.Builder configBuilder = RequestConfig.custom();
// 设置连接超时
configBuilder.setConnectTimeout(MAX_TIMEOUT);
// 设置读取超时
configBuilder.setSocketTimeout(MAX_TIMEOUT);
// 设置从连接池获取连接实例的超时
configBuilder.setConnectionRequestTimeout(MAX_TIMEOUT);

requestConfig = configBuilder.build();
}

/**
* 发送 GET 请求（HTTP），不带输入数据
*
* @param url
* @return
*/
public static JSONObject doGet(String url) {
return doGet(url, new HashMap<String, Object>());
}

/**
* 发送 GET 请求（HTTP），K-V形式
*
* @param url
* @param params
* @return
*/
public static JSONObject doGet(String url, M
4000
ap<String, Object> params) {
String apiUrl = url;
StringBuffer param = new StringBuffer();
int i = 0;
for (String key : params.keySet()) {
if (i == 0)
param.append("?");
else
param.append("&");
param.append(key).append("=").append(params.get(key));
i++;
}
apiUrl += param;
String result = null;
HttpClient httpClient = null;
if (apiUrl.startsWith("https")) {
httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory())
.setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
} else {
httpClient = HttpClients.createDefault();
}
try {
HttpGet httpGet = new HttpGet(apiUrl);
HttpResponse response = httpClient.execute(httpGet);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
result = IOUtils.toString(instream, "UTF-8");
}
} catch (IOException e) {
LoggerUtils.error(logger, e, e.getMessage());
throw new ServiceException(e.getMessage());
}
return JSON.parseObject(result);
}

/**
* 发送 POST 请求（HTTP），不带输入数据
*
* @param apiUrl
* @return
*/
public static JSONObject doPost(String apiUrl) {
return doPost(apiUrl, new HashMap<String, Object>());
}

/**
* 发送 POST 请求，K-V形式
*
* @param apiUrl
* API接口URL
* @param params
* 参数map
* @return
*/
public static JSONObject doPost(String apiUrl, Map<String, Object> params) {
CloseableHttpClient httpClient = null;
if (apiUrl.startsWith("https")) {
httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory())
.setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
} else {
httpClient = HttpClients.createDefault();
}
String httpStr = null;
HttpPost httpPost = new HttpPost(apiUrl);
CloseableHttpResponse response = null;

try {
httpPost.setConfig(requestConfig);
List<NameValuePair> pairList = new ArrayList<>(params.size());
for (Map.Entry<String, Object> entry : params.entrySet()) {
NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue().toString());
pairList.add(pair);
}
httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("UTF-8")));
response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
httpStr = EntityUtils.toString(entity, "UTF-8");
} catch (IOException e) {
LoggerUtils.error(logger, e, e.getMessage());
throw new ServiceException(e.getMessage());
} finally {
if (response != null) {
try {
EntityUtils.consume(response.getEntity());
} catch (IOException e) {
LoggerUtils.error(logger, e, e.getMessage());
throw new ServiceException(e.getMessage());
}
}
}
return JSON.parseObject(httpStr);
}

/**
* 发送 POST 请求，JSON形式
*
* @param apiUrl
* @param json
* json对象
* @return
*/
public static JSONObject doPost(String apiUrl, Object json) {
CloseableHttpClient httpClient = null;
if (apiUrl.startsWith("https")) {
httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory())
.setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
} else {
httpClient = HttpClients.createDefault();
}
String httpStr = null;
HttpPost httpPost = new HttpPost(apiUrl);
CloseableHttpResponse response = null;

try {
httpPost.setConfig(requestConfig);
StringEntity stringEntity = new StringEntity(json.toString(), "UTF-8");// 解决中文乱码问题
stringEntity.setContentEncoding("UTF-8");
stringEntity.setContentType("application/json");
httpPost.setEntity(stringEntity);
response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
httpStr = EntityUtils.toString(entity, "UTF-8");
} catch (IOException e) {
LoggerUtils.error(logger, e, e.getMessage());
throw new ServiceException(e.getMessage());
} finally {
if (response != null) {
try {
EntityUtils.consume(response.getEntity());
} catch (IOException e) {
LoggerUtils.error(logger, e, e.getMessage());
throw new ServiceException(e.getMessage());
}
}
}
return JSON.parseObject(httpStr);
}

/**
* 创建SSL安全连接
*
* @return
*/
private static SSLConnectionSocketFactory createSSLConnSocketFactory() {
SSLConnectionSocketFactory sslsf = null;
try {
SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {

public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
}).build();
sslsf = new SSLConnectionSocketFactory(sslContext, new HostnameVerifier() {

@Override
public boolean verify(String arg0, SSLSession arg1) {
return true;
}
});
} catch (GeneralSecurityException e) {
LoggerUtils.error(logger, e, e.getMessage());
throw new ServiceException(e.getMessage());
}
return sslsf;
}
}