HttpClient 发送 HTTP、HTTPS 请求的简单封装代码,Java代码库,德仔网

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【Java】 HttpClient 发送 HTTP、HTTPS 请求的简单封装
作者:欣蔚 / 发布于2015/11/9/ 572

	<span style="font-family:Comic Sans MS;">import org.apache.commons.io.IOUtils;
	import org.apache.http.HttpEntity;
	import org.apache.http.HttpResponse;
	import org.apache.http.HttpStatus;
	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.SSLContextBuilder;
	import org.apache.http.conn.ssl.TrustStrategy;
	import org.apache.http.conn.ssl.X509HostnameVerifier;
	import org.apache.http.entity.StringEntity;
	import org.apache.http.impl.client.CloseableHttpClient;
	import org.apache.http.impl.client.DefaultHttpClient;
	import org.apache.http.impl.client.HttpClients;
	import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
	import org.apache.http.message.BasicNameValuePair;
	import org.apache.http.util.EntityUtils;

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

	/**
	* HTTP 请求工具类
	*
	* @author : liii
	* @version : 1.0.0
	* @date : 2015/7/21
	* @see : TODO
	*/
	public class HttpUtil {
	 private static PoolingHttpClientConnectionManager connMgr;
	 private static RequestConfig requestConfig;
	 private static final int MAX_TIMEOUT = 7000;

	 static {
	 // 设置连接池
	 connMgr = new PoolingHttpClientConnectionManager();
	 // 设置连接池大小
	 connMgr.setMaxTotal(100);
	 connMgr.setDefaultMaxPerRoute(connMgr.getMaxTotal());

	 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);
	 // 在提交请求之前 测试连接是否可用
	 configBuilder.setStaleConnectionCheckEnabled(true);
	 requestConfig = configBuilder.build();
	 }

	 /**
	 * 发送 GET 请求（HTTP），不带输入数据
	 * @param url
	 * @return
	 */
	 public static String 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 String doGet(String url, Map<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 = new DefaultHttpClient();
	 try {
	 HttpGet httpPost = new HttpGet(apiUrl);
	 HttpResponse response = httpclient.execute(httpPost);
	 int statusCode = response.getStatusLine().getStatusCode();

	 System.out.println("执行状态码 : " + statusCode);

	 HttpEntity entity = response.getEntity();
	 if (entity != null) {
	 InputStream instream = entity.getContent();
	 result = IOUtils.toString(instream, "UTF-8");
	 }
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 return result;
	 }

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

	 /**
	 * 发送 POST 请求（HTTP），K-V形式
	 * @param apiUrl API接口URL
	 * @param params 参数map
	 * @return
	 */
	 public static String doPost(String apiUrl, Map<String, Object> params) {
	 CloseableHttpClient 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);
	 System.out.println(response.toString());
	 HttpEntity entity = response.getEntity();
	 httpStr = EntityUtils.toString(entity, "UTF-8");
	 } catch (IOException e) {
	 e.printStackTrace();
	 } finally {
	 if (response != null) {
	 try {
	 EntityUtils.consume(response.getEntity());
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 }
	 }
	 return httpStr;
	 }

	 /**
	 * 发送 POST 请求（HTTP），JSON形式
	 * @param apiUrl
	 * @param json json对象
	 * @return
	 */
	 public static String doPost(String apiUrl, Object json) {
	 CloseableHttpClient 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();
	 System.out.println(response.getStatusLine().getStatusCode());
	 httpStr = EntityUtils.toString(entity, "UTF-8");
	 } catch (IOException e) {
	 e.printStackTrace();
	 } finally {
	 if (response != null) {
	 try {
	 EntityUtils.consume(response.getEntity());
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 }
	 }
	 return httpStr;
	 }

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

	 try {
	 httpPost.setConfig(requestConfig);
	 List<NameValuePair> pairList = new ArrayList<NameValuePair>(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);
	 int statusCode = response.getStatusLine().getStatusCode();
	 if (statusCode != HttpStatus.SC_OK) {
	 return null;
	 }
	 HttpEntity entity = response.getEntity();
	 if (entity == null) {
	 return null;
	 }
	 httpStr = EntityUtils.toString(entity, "utf-8");
	 } catch (Exception e) {
	 e.printStackTrace();
	 } finally {
	 if (response != null) {
	 try {
	 EntityUtils.consume(response.getEntity());
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 }
	 }
	 return httpStr;
	 }

	 /**
	 * 发送 SSL POST 请求（HTTPS），JSON形式
	 * @param apiUrl API接口URL
	 * @param json JSON对象
	 * @return
	 */
	 public static String doPostSSL(String apiUrl, Object json) {
	 CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
	 HttpPost httpPost = new HttpPost(apiUrl);
	 CloseableHttpResponse response = null;
	 String httpStr = 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);
	 int statusCode = response.getStatusLine().getStatusCode();
	 if (statusCode != HttpStatus.SC_OK) {
	 return null;
	 }
	 HttpEntity entity = response.getEntity();
	 if (entity == null) {
	 return null;
	 }
	 httpStr = EntityUtils.toString(entity, "utf-8");
	 } catch (Exception e) {
	 e.printStackTrace();
	 } finally {
	 if (response != null) {
	 try {
	 EntityUtils.consume(response.getEntity());
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 }
	 }
	 return 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 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 {
	 }
	 });
	 } catch (GeneralSecurityException e) {
	 e.printStackTrace();
	 }
	 return sslsf;
	 }

	
	 /**
	 * 测试方法
	 * @param args
	 */
	 public static void main(String[] args) throws Exception {

	 }
	}</span>
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