httpClient4.5（三、封装一个工具类）

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package com.http.demo.http;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
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.client.utils.URIBuilder;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
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;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
 

/**
 * HttpClient工具类
 *
 */
public class HttpClientUtil {
	private static Log log = LogFactory.getLog(HttpClientUtil.class);
 
	public static final int CONNECTION_TIMEOUT = 5000;// 连接超时时间
 
	public static final int CONNECTION_REQUEST_TIMEOUT = 5000;// 请求超时时间
	
	public static final int SOCKET_TIMEOUT = 10000;// 数据读取等待超时
 
	public static final String HTTP = "http";// http
	
	public static final String HTTPS = "https";// https
	
	public static final int DEFAULT_HTTP_PORT = 80;// http端口
 
	public static final int DEFAULT_HTTPS_PORT = 443;// https端口
 
	public static final String DEFAULT_ENCODING = "UTF-8";// 默认编码
	
	/**
	 * get请求(1.处理http请求;2.处理https请求,信任所有证书)[默认编码:UTF-8]
	 * @param url (参数直接拼接到URL后面，即http://test.com?a=1&b=2的形式)
	 * @return
	 */
	public static String get(String url){
		return get(url, null, DEFAULT_ENCODING);
	}
	
	/**
	 * get请求(1.处理http请求;2.处理https请求,信任所有证书)[默认编码:UTF-8]
	 * @param url (url不带参数，例：http://test.com)
	 * @param reqMap (参数放置到一个map中)
	 * @return
	 */
	public static String get(String url, Map<String, String> reqMap){
		return get(url, reqMap, DEFAULT_ENCODING);
	}	
	
	/**
	 * get请求(1.处理http请求;2.处理https请求,信任所有证书)
	 * @param url (只能是http或https请求)
	 * @param encoding
	 * @return
	 */
	public static String get(String url, Map<String, String> reqMap, String encoding){
		String result = "";
		if (StringUtils.isBlank(url)) {
			log.info("----->url为空");
			return result;
		}
		
		// 处理参数
		List<NameValuePair> params = new ArrayList<NameValuePair>();
		if (reqMap != null && reqMap.keySet().size() > 0) {
			Iterator<Map.Entry<String, String>> iter = reqMap.entrySet().iterator();
			while (iter.hasNext()) {
				Map.Entry<String, String> entity = iter.next();
				params.add(new BasicNameValuePair(entity.getKey(), entity.getValue()));
			}
		}
		
		CloseableHttpClient httpClient = null;
		if (url.startsWith(HTTPS)) {
			// 创建一个SSL信任所有证书的httpClient对象
			httpClient = HttpClientUtil.createSSLInsecureClient();
		}else {
			httpClient = HttpClients.createDefault();
		}
		
		CloseableHttpResponse response = null;
		HttpGet httpGet = null;
		
		try {
			if (params != null && params.size() > 0) {
		        URIBuilder builder = new URIBuilder(url);
		        builder.setParameters(params);
		        httpGet = new HttpGet(builder.build());
			}else {
				httpGet = new HttpGet(url);
			}
			
	        RequestConfig requestConfig = RequestConfig.custom()
	                .setConnectTimeout(CONNECTION_TIMEOUT)   //设置连接超时时间
	                .setConnectionRequestTimeout(CONNECTION_REQUEST_TIMEOUT) // 设置请求超时时间
	                .setSocketTimeout(SOCKET_TIMEOUT)
	                .setRedirectsEnabled(true)//默认允许自动重定向
	                .build();
	        httpGet.setConfig(requestConfig);
	        
	        // 发送请求，并接收响应
			response = httpClient.execute(httpGet);
			
			result = handleResponse(url, encoding, response);
		} catch (Exception e) {
			log.error("----->url:" + url +", get请求异常:" + e.getMessage());
			e.printStackTrace();
		} finally {
			closeResource(httpClient, response);
		}
		
		return result;
	}


	/**
	 * post请求(1.处理http请求;2.处理https请求,信任所有证书)[默认编码:UTF-8]
	 * @param url
	 * @param reqMap
	 * @return
	 */
	public static String post(String url, Map<String, String> reqMap){
		return post(url, reqMap, DEFAULT_ENCODING);
	}
	
	/**
	 * post请求(1.处理http请求;2.处理https请求,信任所有证书)
	 * @param url
	 * @param reqMap 入参是个map
	 * @param encoding
	 * @return
	 */
	public static String post(String url, Map<String, String> reqMap, String encoding){
		String result = "";
		if (StringUtils.isBlank(url)) {
			log.info("----->url为空");
			return result;
		}
		
		// 添加参数
		List<NameValuePair> params = new ArrayList<>();
		if (reqMap != null && reqMap.keySet().size() > 0) {
			Iterator<Map.Entry<String, String>> iter = reqMap.entrySet().iterator();
			while (iter.hasNext()) {
				Map.Entry<String, String> entity = iter.next();
				params.add(new BasicNameValuePair(entity.getKey(), entity.getValue()));
			}
		}
		
		CloseableHttpClient httpClient = null;
		if (url.startsWith(HTTPS)) {
			// 创建一个SSL信任所有证书的httpClient对象
			httpClient = HttpClientUtil.createSSLInsecureClient();
		}else {
			httpClient = HttpClients.createDefault();
		}
		CloseableHttpResponse response = null;
		try {
			HttpPost httpPost = new HttpPost(url);
	        RequestConfig requestConfig = RequestConfig.custom()
	                .setConnectTimeout(CONNECTION_TIMEOUT)   //设置连接超时时间
	                .setConnectionRequestTimeout(CONNECTION_REQUEST_TIMEOUT) // 设置请求超时时间
	                .setSocketTimeout(SOCKET_TIMEOUT)
	                .setRedirectsEnabled(true)//默认允许自动重定向
	                .build();
	        httpPost.setConfig(requestConfig);
	        httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
	        httpPost.setEntity(new UrlEncodedFormEntity(params, encoding));
			
	        // 发送请求，并接收响应
			response = httpClient.execute(httpPost);
			result = handleResponse(url, encoding, response);
		} catch (IOException e) {
			log.error("-----> url:" + url +",post请求异常:" + e.getMessage());
			e.printStackTrace();
		} finally {
			closeResource(httpClient, response);
		}
		
		return result;
	}
	
	/**
	 * post请求(1.处理http请求;2.处理https请求,信任所有证书)
	 * @param url
	 * @param jsonParams 入参是个json字符串
	 * @param encoding
	 * @return
	 */
	public static String post(String url, String jsonParams, String encoding){
		String result = "";
		if (StringUtils.isBlank(url)) {
			log.info("----->url为空");
			return result;
		}
		
		CloseableHttpClient httpClient = null;
		if (url.startsWith(HTTPS)) {
			// 创建一个SSL信任所有证书的httpClient对象
			httpClient = HttpClientUtil.createSSLInsecureClient();
		}else {
			httpClient = HttpClients.createDefault();
		}
		CloseableHttpResponse response = null;
		
		try {
			HttpPost httpPost = new HttpPost(url);
	        RequestConfig requestConfig = RequestConfig.custom()
	                .setConnectTimeout(CONNECTION_TIMEOUT)   //设置连接超时时间
	                .setConnectionRequestTimeout(CONNECTION_REQUEST_TIMEOUT) // 设置请求超时时间
	                .setSocketTimeout(SOCKET_TIMEOUT)
	                .setRedirectsEnabled(true)//默认允许自动重定向
	                .build();
	        httpPost.setConfig(requestConfig);
	        
	        httpPost.setHeader("Content-Type","application/json");
	        httpPost.setEntity(new StringEntity(jsonParams,ContentType.create("application/json", encoding)));
			
	        // 发送请求，并接收响应
			response = httpClient.execute(httpPost);
			result = handleResponse(url, encoding, response);
		} catch (IOException e) {
			log.error("-----> url:" + url +",post请求异常:" + e.getMessage());
			e.printStackTrace();
		} finally {
			closeResource(httpClient, response);
		}
		
		return result;
	}
	
	/**
	 * 创建一个SSL信任所有证书的httpClient对象
	 * 
	 * @return
	 */
	public static CloseableHttpClient createSSLInsecureClient() {
		try {
			SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(null, new TrustStrategy() {
				// 默认信任所有证书
				public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
					return true;
				}
			}).build();

			SSLConnectionSocketFactory sslcsf = new SSLConnectionSocketFactory(sslContext);
			
			return HttpClients.custom().setSSLSocketFactory(sslcsf).build();
		} catch (KeyManagementException e) {
			e.printStackTrace();
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (KeyStoreException e) {
			e.printStackTrace();
		}
		
		return HttpClients.createDefault();
	}
	
	/**
	 * 处理响应，获取响应报文
	 * @param url
	 * @param encoding
	 * @param response
	 * @return
	 * @throws IOException
	 */
	private static String handleResponse(String url, String encoding, CloseableHttpResponse response) {
		StringBuilder sb = new StringBuilder();
		BufferedReader br = null;
		
		try {
			if (response != null) {
				if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
					// 获取响应实体
					HttpEntity entity = response.getEntity();
					
					if (entity != null) {
						br = new BufferedReader(new InputStreamReader(entity.getContent(), encoding));
						String s = null;
						while ((s = br.readLine()) != null) {
							sb.append(s);
						}
					}
					
					// 释放entity
					EntityUtils.consume(entity);
				}else if (response.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_FOUND) {
					log.info("-----> get请求404,未找到资源. url:" + url);
				}else if (response.getStatusLine().getStatusCode() == HttpStatus.SC_INTERNAL_SERVER_ERROR) {
					log.info("-----> get请求500,服务器端异常. url:" + url);
				}
			}
		} catch (Exception e) {
			log.error("----->url:" + url + ",处理响应，获取响应报文异常：" + e.getMessage());
			e.printStackTrace();
		}finally {
			if (br != null) {
				try {
					br.close();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}

		return sb.toString();
	}
	
	/**
	 * 释放资源
	 * @param httpClient
	 * @param response
	 */
	private static void closeResource(CloseableHttpClient httpClient, CloseableHttpResponse response) {
		if (response != null) {
			try {
				response.close();
			} catch (IOException e) {
				log.error("-----> 释放response资源异常:" + e.getMessage());
				e.printStackTrace();
			}
		}
		
		if (httpClient != null) {
			try {
				httpClient.close();
			} catch (Exception e) {
				log.error("-----> 释放httpclient资源异常:" + e.getMessage());
				e.printStackTrace();
			}
		}
	}


	
	/**
	 * 采用绕过验证的方式处理https请求 
	 * @param url
	 * @param reqMap
	 * @param encoding
	 * @return
	 */
	public static String postSSLUrl(String url, Map<String, String> reqMap, String encoding){
	    String result = "";
	    CloseableHttpClient httpClient = null;
	    CloseableHttpResponse response = null;
		// 添加参数
		List<NameValuePair> params = new ArrayList<>();
		if (reqMap != null && reqMap.keySet().size() > 0) {
			Iterator<Map.Entry<String, String>> iter = reqMap.entrySet().iterator();
			while (iter.hasNext()) {
				Map.Entry<String, String> entity = iter.next();
				params.add(new BasicNameValuePair(entity.getKey(), entity.getValue()));
			}
		}
	    
	    try{
		    //采用绕过验证的方式处理https请求  
		    SSLContext sslcontext = createIgnoreVerifySSL();  
		    //设置协议http和https对应的处理socket链接工厂的对象  
		    Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()  
		        .register("http", PlainConnectionSocketFactory.INSTANCE)  
		        .register("https", new SSLConnectionSocketFactory(sslcontext))  
		        .build();  
		    PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);  
		    HttpClients.custom().setConnectionManager(connManager); 
	
		    //创建自定义的httpclient对象  
		    httpClient = HttpClients.custom().setConnectionManager(connManager).build();  

	        //创建post方式请求对象  
	        HttpPost httpPost = new HttpPost(url); 
	        httpPost.setEntity(new UrlEncodedFormEntity(params, encoding));
	        
	        //指定报文头Content-type、User-Agent
	        httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");  
	        //httpPost.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; rv:6.0.2) Gecko/20100101 Firefox/6.0.2");

	        //执行请求操作，并拿到结果（同步阻塞）  
 			response = httpClient.execute(httpPost);
 			result = handleResponse(url, encoding, response); 
	    }catch(Exception e){
	    	e.printStackTrace();
	    }finally{
	    	closeResource(httpClient, response);
	    }
	    
	    return result;
	}
	
	/** 
	* 绕过验证 
	*   
	* @return 
	* @throws NoSuchAlgorithmException  
	* @throws KeyManagementException  
	*/  
	public static SSLContext createIgnoreVerifySSL() throws NoSuchAlgorithmException, KeyManagementException {  
	        SSLContext sc = SSLContext.getInstance("SSLv3");  

	        // 实现一个X509TrustManager接口，用于绕过验证，不用修改里面的方法  
	        X509TrustManager trustManager = new X509TrustManager() {  
	            @Override  
	            public void checkClientTrusted(  
	                    java.security.cert.X509Certificate[] paramArrayOfX509Certificate,  
	                    String paramString) throws CertificateException {  
	            }  

	            @Override  
	            public void checkServerTrusted(  
	                    java.security.cert.X509Certificate[] paramArrayOfX509Certificate,  
	                    String paramString) throws CertificateException {  
	            }  

	            @Override  
	            public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
	                return null;  
	            }  
	        };  

	        sc.init(null, new TrustManager[] { trustManager }, null);  
	        return sc;  
	    }
	 
}