初始化证书 - HTTPClient

//String web_inf = request.getServletContext().getRealPath("/WEB-INF/");

public SSLContext initSSLContext(String path) {
        FileInputStream inputStream = null;
        try {
            inputStream = new FileInputStream(new File(path + "/tmp.p12"));
        } catch (IOException e) {
            throw new RuntimeException("读取证书文件出错", e);
        }

        try {
            KeyStore keystore = KeyStore.getInstance("PKCS12");
            char[] partnerId2charArray = MCH_ID.toCharArray();
            keystore.load(inputStream, partnerId2charArray);
            SSLContext sslContext = SSLContexts.custom().loadKeyMaterial(keystore, partnerId2charArray).build();
            return sslContext;
        } catch (Exception e) {
            throw new RuntimeException("证书文件有问题，请核实！", e);
        } finally {
            IOUtils.closeQuietly(inputStream);
        }
    }