Java使用HTTPClient4.3开发的公众平台消息模板的推送功能

代码引用，参考文章：http://www.cnblogs.com/feiyun126/p/4778556.html，表示感谢！

 package com.yuanchuangyun.cyb.manager.busniess.impl;

 import java.io.IOException;
 import java.net.SocketTimeoutException;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
 import java.security.GeneralSecurityException;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 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.CloseableHttpResponse;
 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;
 import org.apache.http.util.EntityUtils;
 import org.json.JSONException;
 import org.json.JSONObject;

 /**
  * 依赖的jar包有：commons-lang-2.6.jar、httpclient-4.3.2.jar、httpcore-4.3.1.jar、commons-io-2.4.jar
  * @author Renguoqiang
  *
  */
 public class WeiXinTemplateMessageService {

     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 {
         PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
         cm.setMaxTotal(128);
         cm.setDefaultMaxPerRoute(128);
         client = HttpClients.custom().setConnectionManager(cm).build();
     }

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

     public static String postParameters(String url, Map<String, String> params) throws ConnectTimeoutException,
      SocketTimeoutException, Exception {
          return postForm(url, params, null, connTimeout, readTimeout);
      }

     public static String postParameters(String url, Map<String, String> params, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
     SocketTimeoutException, Exception {
          return postForm(url, params, null, connTimeout, readTimeout);
      }

     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);
     } 

     /**
      * 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();

                 HttpGet httpGet = new HttpGet("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=xxxxxxxxxxxxxxx&secret=xxxxxxxxxxxxxxxxxxxxxxxxxxxx");
                 HttpResponse responseGet = client.execute(httpGet);
                 //System.out.println(responseGet);
                 String responseText = EntityUtils.toString(responseGet.getEntity(), StandardCharsets.UTF_8);
                 //System.out.println(responseText);
                 httpGet.releaseConnection();
                 String access_token = "";
                 access_token = responseText.replaceAll("(?s).*access_token\":\"", "").replaceAll("(?s)\",\"expires_in.*", "");
                 System.out.println("access_token:"+access_token);

                 post.setURI(new URI(post.getURI()+access_token));

                 res = client.execute(post);
             } else {
                 // 执行 Http 请求.
                 client = WeiXinTemplateMessageService.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;
     }  

     /**
      * 提交form表单
      *
      * @param url
      * @param params
      * @param connTimeout
      * @param readTimeout
      * @return
      * @throws ConnectTimeoutException
      * @throws SocketTimeoutException
      * @throws Exception
      */
     public static String postForm(String url, Map<String, String> params, Map<String, String> headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,
             SocketTimeoutException, Exception {  

         HttpClient client = null;
         HttpPost post = new HttpPost(url);
         try {
             if (params != null && !params.isEmpty()) {
                 List<NameValuePair> formParams = new ArrayList<org.apache.http.NameValuePair>();
                 Set<Entry<String, String>> entrySet = params.entrySet();
                 for (Entry<String, String> entry : entrySet) {
                     formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                 }
                 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);
                 post.setEntity(entity);
             }

             if (headers != null && !headers.isEmpty()) {
                 for (Entry<String, String> entry : headers.entrySet()) {
                     post.addHeader(entry.getKey(), entry.getValue());
                 }
             }
             // 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 = null;
             if (url.startsWith("https")) {
                 // 执行 Https 请求.
                 client = createSSLInsecureClient();
                 res = client.execute(post);
             } else {
                 // 执行 Http 请求.
                 client = WeiXinTemplateMessageService.client;
                 res = client.execute(post);
             }
             return IOUtils.toString(res.getEntity().getContent(), "UTF-8");
         } finally {
             post.releaseConnection();
             if (url.startsWith("https") && client != null
                     && client instanceof CloseableHttpClient) {
                 ((CloseableHttpClient) client).close();
             }
         }
     } 

     /**
      * 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 = WeiXinTemplateMessageService.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;
     }  

     /**
      * 从 response 里获取 charset
      *
      * @param ressponse
      * @return
      */
     @SuppressWarnings("unused")
     private static String getCharsetFromResponse(HttpResponse ressponse) {
         // Content-Type:text/html; charset=GBK
         if (ressponse.getEntity() != null  && ressponse.getEntity().getContentType() != null && ressponse.getEntity().getContentType().getValue() != null) {
             String contentType = ressponse.getEntity().getContentType().getValue();
             if (contentType.contains("charset=")) {
                 return contentType.substring(contentType.indexOf("charset=") + 8);
             }
         }
         return null;
     }  

     /**
      * 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 void main(String[] args) {
         try {
             JSONObject jsonParam = new JSONObject();
             try {
                 jsonParam.put("touser","o8cOBwvAJTSPbOhOInWlb7GYdKuA");
                 jsonParam.put("template_id","yke5zUpgAolH5FzxIj8OuzX_qQ2jAEVpFWpzkU7a59c");
                 jsonParam.put("url","http://weixin.qq.com/download");
                 jsonParam.put("data","{}");
             } catch (JSONException e) {
                 System.out.println(e);
                 e.printStackTrace();
             }
             String jsonStr = jsonParam.toString();

             String str= post("https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=",jsonStr,"application/json", "UTF-8", 10000, 10000);
             System.out.println(str);
         } catch (ConnectTimeoutException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (SocketTimeoutException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
 }