public static CloseableHttpClient getHttpClient() throws Exception {

         SSLConnectionSocketFactory sslsf = null;

         PoolingHttpClientConnectionManager cm = null;

         SSLContextBuilder builder = null;

         builder = new SSLContextBuilder();

         // 全部信任 不做身份鉴定

         builder.loadTrustMaterial(null, new TrustStrategy() {

             @Override

             public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

                 return true;

             }

         });

         sslsf = new SSLConnectionSocketFactory(builder.build(), new String[]{"SSLv2Hello", "SSLv3", "TLSv1", "TLSv1.2"}, null, NoopHostnameVerifier.INSTANCE);

         CloseableHttpClient httpClient = HttpClients.custom()

                 .setSSLSocketFactory(sslsf)

                 .setConnectionManager(cm)

                 .setConnectionManagerShared(true)

                 .build();

         return httpClient;

     }

 public static void postParams(String filepath) {

         String url = "http://192.188.188.190:8080/dcs.web/upload";//

         CloseableHttpClient  httpclient = null;

         try {

             httpclient = getHttpClient();

         }catch (Exception e){

             e.printStackTrace();

         }

         CloseableHttpResponse response = null;

         String result = null;

         try {

             HttpPost httpPost = new HttpPost(url+"upload");

             MultipartEntityBuilder mEntityBuilder = MultipartEntityBuilder.create().setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

             mEntityBuilder.setCharset(Charset.forName(HttpUtil.ENC_UTF_8));

             FileBody file = new FileBody(new File(filepath));

             mEntityBuilder.addPart("file", file);

             StringBody comment = new StringBody(type, ContentType.APPLICATION_JSON);

             mEntityBuilder.addPart("convertType", comment);

             HttpEntity reqEntity = mEntityBuilder.build();

             httpPost.setEntity(reqEntity);

             response = httpclient.execute(httpPost);

             int statusCode = response.getStatusLine().getStatusCode();

             if (statusCode == HttpStatus.SC_OK) {

                 HttpEntity resEntity = response.getEntity();

                 result = EntityUtils.toString(resEntity);

                 EntityUtils.consume(resEntity);

                 JSONObject resultJson = JSONObject.fromObject(result);

                //返回是否成功等信息

             } else {

                 exeResultEntity.message = "转换pdf服务无响应！";

             }

         } catch (Exception e) {

             exeResultEntity.message = "pdf转换异常，错误信息：" + e.getMessage();

             logger.error("请求DCS转化pdf服务错误！", e);

         } finally {

             HttpClientUtils.closeQuietly(httpclient);

             HttpClientUtils.closeQuietly(response);

         }

         return exeResultEntity;

     }

 public static byte[] downloadFileFromNet(String url){

         try {

             HttpGet httpget = new HttpGet(url);

             HttpClient httpClient = getHttpClient();

             HttpResponse response = httpClient.execute(httpget);

             int statusCode = response.getStatusLine().getStatusCode();

             if (statusCode == HttpStatus.SC_OK) {

                 HttpEntity entity = response.getEntity();

                 InputStream is = entity.getContent();

                 byte[] fileByte = readInputStream(is);

                 is.close();

                 return  fileByte;

             }

         }catch (Exception e){

             e.printStackTrace();

         }

         return  null;

     }