PS：代码是copy腾讯提供的demo，但运行有问题，望大拿能够帮忙解决

加载证书时间出现如下错误：
java.io.IOException: DER input, Integer tag error
at sun.security.util.DerInputStream.getInteger(DerInputStream.java:151)
at com.sun.net.ssl.internal.pkcs12.PKCS12KeyStore.engineLoad(PKCS12KeyStore.java:1202)
at java.security.KeyStore.load(KeyStore.java:1183)
at com.caibeike.tps.utils.HttpTookit.doSSLPostP12(HttpTookit.java:86)
at com.caibeike.tps.finance.controller.RefundController.submitTenRefundBatch(RefundController.java:184)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

我的代码：
KeyStore keyStore = KeyStore.getInstance("PKCS12");
FileInputStream instream = new FileInputStream(p12FilePath);
char[] pwd = p12Pwd.toCharArray();
try {
keyStore.load(instream, pwd);
} catch(Exception e){
e.printStackTrace();
} finally {
instream.close();
}

 // Trust own CA and all self-signed certs
    SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, p12Pwd.toCharArray()).build();
    // Allow TLSv1 protocol only
    SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,
            SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
    CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
    try {

        HttpGet httpget = new HttpGet(urlStr);

        System.out.println("executing request" + httpget.getRequestLine());

        CloseableHttpResponse response = httpclient.execute(httpget);
        try {
            HttpEntity entity = response.getEntity();

            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            if (entity != null) {
                System.out.println("Response content length: " + entity.getContentLength());
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
                String text;
                while ((text = bufferedReader.readLine()) != null) {
                    System.out.println(text);
                }

            }
            EntityUtils.consume(entity);
        } finally {
            response.close();
        }
    } finally {
        httpclient.close();
    }