package com.cer.test;
import java.io.FileInputStream;  
import java.security.cert.CertificateFactory;  
import java.security.cert.X509Certificate;  
  
/** 
 * @author God 
 * 随便找一个.cer文件读取即可 
 */  
public class CertUtil12 {  
    /** 
     * @author God 
     * @cerPath Java读取Cer证书信息 
     * @throws Exception  
     * @return X509Cer对象 
     */  
    public static X509Certificate getX509CerCate(String cerPath) throws Exception {  
        X509Certificate x509Certificate = null;  
        CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");  
        FileInputStream fileInputStream = new FileInputStream(cerPath);  
        x509Certificate = (X509Certificate) certificateFactory.generateCertificate(fileInputStream);  
        fileInputStream.close();  
        System.out.println("读取Cer证书信息...");  
        System.out.println("x509Certificate_SerialNumber_序列号___:"+x509Certificate.getSerialNumber());  
        System.out.println("版本号:"+x509Certificate.getVersion());
        System.out.println("序列号:"+x509Certificate.getSerialNumber().toString(16));
        System.out.println("主体名："+x509Certificate.getSubjectDN());
        System.out.println("签发者："+x509Certificate.getIssuerDN());
        System.out.println("有效期："+x509Certificate.getNotBefore());

      System.out.println("截止日期："+x509Certificate.getNotAfter());

        System.out.println("签名算法："+x509Certificate.getSigAlgName());
        System.out.println("x509Certificate_getIssuerDN_发布方标识名___:"+x509Certificate.getIssuerDN());   
        System.out.println("x509Certificate_getSubjectDN_主体标识___:"+x509Certificate.getSubjectDN());  
        System.out.println("x509Certificate_getSigAlgOID_证书算法OID字符串___:"+x509Certificate.getSigAlgOID());  
        System.out.println("x509Certificate_getNotBefore_证书有效期___:"+x509Certificate.getNotAfter());  
        System.out.println("x509Certificate_getSigAlgName_签名算法___:"+x509Certificate.getSigAlgName());  
        System.out.println("x509Certificate_getVersion_版本号___:"+x509Certificate.getVersion());  
        System.out.println("x509Certificate_getPublicKey_公钥___:"+x509Certificate.getPublicKey());  
        return x509Certificate;  
    }  
 
   
}