类层次结构
- java.lang.Object 
       
- javax.security.cert.Certificate 
         
- javax.security.cert.X509Certificate
 
 - java.lang.Throwable (implements java.io.Serializable) 
         
- java.lang.异常 
           
- javax.security.cert.CertificateException 
             
- javax.security.cert.CertificateEncodingException
 - javax.security.cert.CertificateExpiredException
 - javax.security.cert.CertificateNotYetValidException
 - javax.security.cert.CertificateParsingException
 
 
 - javax.security.cert.CertificateException 
             
 
 - java.lang.异常 
           
 
 - javax.security.cert.Certificate