HttpClient简单封装及使用

1：所需jar包，下载地址http://hc.apache.org/downloads.cgi

2：封装类

package com.java.test;import java.io.File;import java.io.IOException;import java.net.URL;import java.util.ArrayList;import java.util.List;import java.util.Map;import org.apache.http.HttpEntity;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.conn.ssl.DefaultHostnameVerifier;import org.apache.http.conn.util.PublicSuffixMatcher;import org.apache.http.conn.util.PublicSuffixMatcherLoader;import org.apache.http.entity.ContentType;import org.apache.http.entity.StringEntity;import org.apache.http.entity.mime.MultipartEntityBuilder;import org.apache.http.entity.mime.content.FileBody;import org.apache.http.entity.mime.content.StringBody;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;public class HttpClientUtil {    private RequestConfig requestConfig = RequestConfig.custom()              .setSocketTimeout(15000)              .setConnectTimeout(15000)              .setConnectionRequestTimeout(15000)              .build();            private static HttpClientUtil instance = null;      private HttpClientUtil(){}      public static HttpClientUtil getInstance(){          if (instance == null) {              instance = new HttpClientUtil();          }          return instance;      }        /**      * 发送 post请求      * @param httpUrl 地址      */      public String sendHttpPost(String httpUrl) {          HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost            return sendHttpPost(httpPost);      }         /**      * 发送 post请求      * @param httpUrl 地址      * @param params 参数(格式:key1=value1&key2=value2)      */      public String sendHttpPost(String httpUrl, String params) {          HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost            try {              //设置参数              StringEntity stringEntity = new StringEntity(params, "UTF-8");              stringEntity.setContentType("application/x-www-form-urlencoded");              httpPost.setEntity(stringEntity);          } catch (Exception e) {              e.printStackTrace();          }          return sendHttpPost(httpPost);      }         /**      * 发送 post请求      * @param httpUrl 地址      * @param maps 参数      */      public String sendHttpPost(String httpUrl, Map<String, String> maps) {          HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost            // 创建参数队列            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();          for (String key : maps.keySet()) {              nameValuePairs.add(new BasicNameValuePair(key, maps.get(key)));          }          try {              httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));          } catch (Exception e) {              e.printStackTrace();          }          return sendHttpPost(httpPost);      }         /**      * 发送 post请求（带文件）      * @param httpUrl 地址      * @param maps 参数      * @param fileLists 附件      */      public String sendHttpPost(String httpUrl, Map<String, String> maps, List<File> fileLists) {          HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost            MultipartEntityBuilder meBuilder = MultipartEntityBuilder.create();          for (String key : maps.keySet()) {              meBuilder.addPart(key, new StringBody(maps.get(key), ContentType.TEXT_PLAIN));          }          for(File file : fileLists) {              FileBody fileBody = new FileBody(file);              meBuilder.addPart("files", fileBody);          }          HttpEntity reqEntity = meBuilder.build();          httpPost.setEntity(reqEntity);          return sendHttpPost(httpPost);      }          /**      * 发送Post请求      * @param httpPost      * @return      */      private String sendHttpPost(HttpPost httpPost) {          CloseableHttpClient httpClient = null;          CloseableHttpResponse response = null;          HttpEntity entity = null;          String responseContent = null;          try {              // 创建默认的httpClient实例.              httpClient = HttpClients.createDefault();              httpPost.setConfig(requestConfig);              // 执行请求              response = httpClient.execute(httpPost);              entity = response.getEntity();              responseContent = EntityUtils.toString(entity, "UTF-8");          } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  // 关闭连接,释放资源                  if (response != null) {                      response.close();                  }                  if (httpClient != null) {                      httpClient.close();                  }              } catch (IOException e) {                  e.printStackTrace();              }          }          return responseContent;      }                 /**      * 发送 get请求      * @param httpUrl      */      public String sendHttpGet(String httpUrl) {          HttpGet httpGet = new HttpGet(httpUrl);// 创建get请求          return sendHttpGet(httpGet);      }            /**      * 发送 get请求Https      * @param httpUrl      */      public String sendHttpsGet(String httpUrl) {          HttpGet httpGet = new HttpGet(httpUrl);// 创建get请求          return sendHttpsGet(httpGet);      }            /**      * 发送Get请求      * @param httpPost      * @return      */      private String sendHttpGet(HttpGet httpGet) {          CloseableHttpClient httpClient = null;          CloseableHttpResponse response = null;          HttpEntity entity = null;          String responseContent = null;          try {              // 创建默认的httpClient实例.              httpClient = HttpClients.createDefault();              httpGet.setConfig(requestConfig);              // 执行请求              response = httpClient.execute(httpGet);              entity = response.getEntity();              responseContent = EntityUtils.toString(entity, "UTF-8");          } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  // 关闭连接,释放资源                  if (response != null) {                      response.close();                  }                  if (httpClient != null) {                      httpClient.close();                  }              } catch (IOException e) {                  e.printStackTrace();              }          }          return responseContent;      }            /**      * 发送Get请求Https      * @param httpPost      * @return      */      private String sendHttpsGet(HttpGet httpGet) {          CloseableHttpClient httpClient = null;          CloseableHttpResponse response = null;          HttpEntity entity = null;          String responseContent = null;          try {              // 创建默认的httpClient实例.              PublicSuffixMatcher publicSuffixMatcher = PublicSuffixMatcherLoader.load(new URL(httpGet.getURI().toString()));              DefaultHostnameVerifier hostnameVerifier = new DefaultHostnameVerifier(publicSuffixMatcher);              httpClient = HttpClients.custom().setSSLHostnameVerifier(hostnameVerifier).build();              httpGet.setConfig(requestConfig);              // 执行请求              response = httpClient.execute(httpGet);              entity = response.getEntity();              responseContent = EntityUtils.toString(entity, "UTF-8");          } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  // 关闭连接,释放资源                  if (response != null) {                      response.close();                  }                  if (httpClient != null) {                      httpClient.close();                  }              } catch (IOException e) {                  e.printStackTrace();              }          }          return responseContent;      }      }

3：测试类

package com.java.test;import java.util.HashMap;import java.util.Map;public class Test01 {        /**     *   url拼接参数     *       */    public static void test01(){        String responseContent = HttpClientUtil.getInstance()                  .sendHttpPost("http://127.0.0.1:8090/activeAction!queryList.action?sj=13901828800");          System.out.println("reponse content:" + responseContent);     }        /**     * 多个参数     *      */    public static void test02(){        String responseContent = HttpClientUtil.getInstance()                  .sendHttpPost("http://127.0.0.1:8090/activeAction!queryList.action", "sj=13901828800");          System.out.println("reponse content:" + responseContent);      }        /**     * map参数     *      */    public static void test03(){        Map<String, String> maps = new HashMap<String, String>();          maps.put("sj", "13901828800");          String responseContent = HttpClientUtil.getInstance()                  .sendHttpPost("http://127.0.0.1:8090/activeAction!queryList.action", maps);          System.out.println("reponse content:" + responseContent);     }        /**     * get     *      */    public static void test04(){        String responseContent = HttpClientUtil.getInstance().sendHttpGet                ("http://127.0.0.1:8090/activeAction!queryList.action?sj=13901828800");          System.out.println("reponse content:" + responseContent);     }        public static void test05(){        String responseContent = HttpClientUtil.getInstance().sendHttpGet                ("https://www.baidu.com");          System.out.println("reponse content:" + responseContent);     }        public static void main(String[] args) {        //test01();        //test02();        //test03();        //test04();        test05();    }            }