Java发送httpPost请求带证书

/**
     * 带证书httpPost请求
     * @param url   接口地址
     * @param param 参数
     * @return
     * @throws Exception
     */
    public static String sendRedEnvelope(String url, String param) throws Exception {
        //PKCS12的密码
        String PKCS12 = "";
        //证书地址
        String fileRoute = "";
        //指定读取证书格式为PKCS12
        KeyStore keyStore = KeyStore.getInstance("PKCS12");
        //读取本机存放的PKCS12证书文件
        FileInputStream instream = new FileInputStream(new File(fileRoute));
        try {
            //指定PKCS12的密码
            keyStore.load(instream, PKCS12.toCharArray());
        } finally {
            instream.close();
        }
        //指定TLS版本
        SSLContext sslcontext = SSLContexts.custom()
                .loadKeyMaterial(keyStore, PKCS12.toCharArray())
                .build();
        //设置httpclient的SSLSocketFactory
        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
                sslcontext,
                new String[]{"TLSv1"},
                null,
                SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
        CloseableHttpClient httpclient = HttpClients.custom()
                .setSSLSocketFactory(sslsf)
                .build();
        StringBuffer stringBuffer = new StringBuffer();
        try {
            HttpPost httpPost = new HttpPost(url);
            InputStream is = new ByteArrayInputStream(param.getBytes("UTF-8"));
            //InputStreamEntity严格是对内容和长度相匹配的。用法和BasicHttpEntity类似
            InputStreamEntity inputStreamEntity = new InputStreamEntity(is, is.available());
            httpPost.setEntity(inputStreamEntity);
            CloseableHttpResponse response = httpclient.execute(httpPost);
            try {
                HttpEntity entity = response.getEntity();
                BufferedReader reader = new BufferedReader(new InputStreamReader(
                        entity.getContent(), "UTF-8"));
                String inputLine;
                while ((inputLine = reader.readLine()) != null) {
                    stringBuffer.append(inputLine);
                }
            } finally {
                response.close();
            }
        } finally {
            httpclient.close();
        }
        return stringBuffer.toString();
    }

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