java 读取.pfx证书文件公钥私钥字符串

import cn.hutool.core.codec.Base64Encoder;

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;
import java.util.Enumeration;

public class ReadP12Cert
{
    public static void main(String[] args)
    {
        //证书路径
        final String KEYSTORE_FILE     = "D:\\123.pfx";
        //证书密码
        final String KEYSTORE_PASSWORD = "111111";


        try
        {
            //获取PKCS12密钥库
            KeyStore ks = KeyStore.getInstance("PKCS12");
            FileInputStream fis = new FileInputStream(KEYSTORE_FILE);

            // If the keystore password is empty(""), then we have to set
            // to null, otherwise it won't work!!!
            char[] nPassword = null;
            if ((KEYSTORE_PASSWORD == null) || KEYSTORE_PASSWORD.trim().equals(""))
            {
                nPassword = null;
            }
            else
            {   //把密码字符串转为字符数组
                nPassword = KEYSTORE_PASSWORD.toCharArray();
            }
            //将.pfx证书信息加载密钥库
            ks.load(fis, nPassword);
            fis.close();
            //证书类型
            System.out.println("keystore type=" + ks.getType());


            Enumeration enum1 = ks.aliases();
            String keyAlias = null;
            if (enum1.hasMoreElements())
            {   //获取证书别名
                keyAlias = (String)enum1.nextElement();
                System.out.println("alias=[" + keyAlias + "]");
            }


            System.out.println("is key entry=" + ks.isKeyEntry(keyAlias));
            PrivateKey prikey = (PrivateKey) ks.getKey(keyAlias, nPassword);
            Certificate cert = ks.getCertificate(keyAlias);
            PublicKey pubkey = cert.getPublicKey();


            System.out.println("cert class = " + cert.getClass().getName());
            System.out.println("cert = " + cert);
            System.out.println("public key = " + Base64Encoder.encode(pubkey.getEncoded()));
            System.out.println("private key = " + Base64Encoder.encode(prikey.getEncoded()));
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}