WXPayConfig 获取配置数据

private byte[] certData;

@PostConstruct
public void init() throws Exception {
    Resource resource = new ClassPathResource("cert/weixin/apiclient_cert.p12");
    try (InputStream certStream = resource.getInputStream()){
        this.certData = new byte[(int) resource.contentLength()];
        certStream.read(this.certData);
    }
}
@Override
protected InputStream getCertStream() {
    ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
    return certBis;
}

支付的时候报错：

DerInputStream.getLength(): lengthTag=111, too big.