public class HttpClientHelper {private RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(15000).setConnectTimeout(15000).setConnectionRequestTimeout(15000).build();private static HttpClientHelper instance = null;public HttpClientHelper() {}public static HttpClientHelper getInstance() {if (instance == null) {instance = new HttpClientHelper();}return instance;}/*** 发送 post请求** @param httpUrl*            地址*/public String sendHttpPost(String httpUrl) {HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPostreturn 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httpPosttry {// 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httpPostMultipartEntityBuilder meBuilder = MultipartEntityBuilder.create();if (maps != null) {for (String key : maps.keySet()) {meBuilder.addPart(key, new StringBody(maps.get(key), ContentType.TEXT_PLAIN));}}if (fileLists != null) {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;}public String sendJsonHttpPost(String url, String json) {CloseableHttpClient httpclient = HttpClients.createDefault();String responseInfo = null;try {HttpPost httpPost = new HttpPost(url);httpPost.addHeader("Content-Type", "application/json;charset=UTF-8");ContentType contentType = ContentType.create("application/json", CharsetUtils.get("UTF-8"));httpPost.setEntity(new StringEntity(json, contentType));CloseableHttpResponse response = httpclient.execute(httpPost);HttpEntity entity = response.getEntity();int status = response.getStatusLine().getStatusCode();if (status >= 200 && status < 300) {if (null != entity) {responseInfo = EntityUtils.toString(entity);}}} catch (Exception e) {e.printStackTrace();} finally {try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}return responseInfo;}/*** 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 httpGet* @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 httpGet* @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;}public static void main(String[] args) {HttpClientHelper h = new HttpClientHelper();Map map = new HashMap();map.put("messageid", "test00201612210002");map.put("clientid", "test00");map.put("index_id", "买方会员");map.put("threshold", 0.9);List<String> data = new ArrayList<String>();data.add("wo xiang cha xun jin tian de yao pin jia ge lie biao");map.put("data", data);String json = JSON.toJSONString(map);String reply = h.sendJsonHttpPost("http://11.11.40.63:7777/algor/simclassify", json);System.out.println("reply->"+reply);}
}

LinkedHashMap<String, String> jsonMap = JSON.parseObject(jsonStr,new TypeReference<LinkedHashMap<String, String>>() {});
for (Map.Entry<String, String> entry : jsonMap.entrySet()) {
if (Float.valueOf(entry2.getValue()) > tempValue) {
key = entry.getKey());
value= entry.getValue();
}
}