Dyaod的专栏

（1）从密钥库中读取CA的证书 FileInputStream in=new FileInputStream(".keystore"); KeyStore ks=KeyStore.getInstance("JKS"); ks.load(in,storepass.toCharArray()); java.security.cert.Certificate c1=ks.getCertificate

（1）验证证书的有效期 （a）获取X509Certificate类型对象 CertificateFactory cf=CertificateFactory.getInstance("X.509"); FileInputStream in1=new FileInputStream("aa.crt"); java.security.cert.Certificate c1=cf.generateCert