java - Digital Persona one touch sdk-无法在java中执行验证

Question

我使用小程序捕获了字符串形式的功能集。我需要将该字符串转换回字节并将其反序列化以匹配它。但我不知道哪里出了问题，因为它没有将模板与功能集进行比较。我已经为此奋斗了几个星期，请任何人帮助我。

//Converting string stored in db back to template:
            byte[] byteArray = new byte[1];
            byteArray = hexStringToByteArray(dbTemplate);
            DPFPTemplate template = DPFPGlobal.getTemplateFactory().createTemplate();
            template.deserialize(byteArray);

//Converting featureset string captured by applet 
            byte[] fsArray = new byte[1];
            fsArray = hexStringToByteArray(ftsetstring);
            DPFPFeatureSet features = null;
            features.deserialize(fsArray);

//Comparing template with features acquired
            DPFPVerification matcher =   DPFPGlobal.getVerificationFactory().createVerification();
            DPFPVerificationResult fresult = matcher.verify(features, template);

                if (fresult.isVerified()) {

                    return "The fingerprint was VERIFIED.";

                } else {
                    return "The fingerprint was NOT VERIFIED.";

我的错误在哪里？？？

Answer 1

我以前从未使用过 Digital Persona，但在任何 API 中，都是这样的:

        DPFPFeatureSet features = null;
        features.deserialize(fsArray);

将导致NullPointerException。我试图查找如何正确使用该类，但您必须是 Digital Persona 的成员才能查看 javadoc。抱歉!