https:

try{
			

			
		StringBuffer reultBuffer = new StringBuffer();
			
		KeyStore keyStore  = KeyStore.getInstance("PKCS12");
		FileInputStream instream = new FileInputStream(new File("/home/certificate/apiclient_cert.p12"));
	        String passwordssss=mch_id;
	        keyStore.load(instream, passwordssss.toCharArray());	//证书密码
	        instream.close();
	        SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, passwordssss.toCharArray()).build();	//证书密码（初始是商户ID）
	        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,new String[] { "TLSv1" },null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
	        
		HttpPost httpPost = new HttpPost("https://fraud.mch.weixin.qq.com/risk/getpublickey");
	        CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
	        httpPost.setHeader("Content-Type", "text/xml; charset=UTF-8");
	        httpPost.setEntity(new StringEntity(str_lingqian.toString(),"UTF-8"));
	        
	        CloseableHttpResponse response      = null;
	        InputStream inputStream		        = null;
	        InputStreamReader inputStreamReader = null;
	        BufferedReader bufferedReader       = null;
	        try {
	        	response = httpclient.execute(httpPost);
	        	HttpEntity entity = response.getEntity();
				if (entity!=null){
					inputStream = entity.getContent();
					inputStreamReader = new InputStreamReader(inputStream,"UTF-8");
					bufferedReader = new BufferedReader(inputStreamReader);
					String str = null;
					while ((str = bufferedReader.readLine()) != null) {
						reultBuffer.append(str);
						System.out.println(str);
					}
				}
			} catch (ClientProtocolException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}finally{

				httpclient.close();
				response.close();
				bufferedReader.close();
				inputStreamReader.close();
				inputStream.close();
				inputStream = null;
			}
	     
	        Document document = DocumentHelper.parseText(reultBuffer.toString());
	        Element rootElm = document.getRootElement();
	        if(rootElm.elementText("return_code").toString().equals("SUCCESS") && rootElm.elementText("result_code").toString().equals("SUCCESS") ){
	        	pub_key = rootElm.elementText("pub_key").toString();
	        	System.out.println("pub_key = "+pub_key);
	        }else{	        	
	        	return status;
	        }
			
}catch(Exception e){
	e.printStackTrace();
}