diff --git a/src/main/java/com/yexuejc/base/encrypt/RSA2.java b/src/main/java/com/yexuejc/base/encrypt/RSA2.java
index 17adc07..20f516b 100644
--- a/src/main/java/com/yexuejc/base/encrypt/RSA2.java
+++ b/src/main/java/com/yexuejc/base/encrypt/RSA2.java
@@ -1,5 +1,7 @@
 package com.yexuejc.base.encrypt;
 
+import com.yexuejc.base.util.StrUtil;
+
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -12,6 +14,7 @@ import java.security.cert.CertificateException;
 import java.security.cert.CertificateFactory;
 import java.security.interfaces.RSAPrivateKey;
 import java.security.interfaces.RSAPublicKey;
+import java.util.Enumeration;
 
 /**
  * RSA加解密 证书模式
@@ -42,7 +45,7 @@ public class RSA2 {
     }
 
     /**
-     * 得到私钥
+     * 读取JKS格式的key（私钥）keystore格式
      *
      * @param filepath 私钥路径
      * @param alias    证书别名
@@ -55,11 +58,54 @@ public class RSA2 {
      * @throws UnrecoverableKeyException
      */
     public static RSAPrivateKey getPrivateKey(String filepath, String alias, String password) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
-        KeyStore ks = KeyStore.getInstance("JKS");
+        return getPrivateKey(filepath, alias, password, "JKS");
+    }
+
+    /**
+     * 读取PKCS12格式的key（私钥）pfx格式
+     *
+     * @param filepath 私钥路径
+     * @param alias    证书别名 可空
+     * @param password 证书密码
+     * @return
+     * @throws NoSuchAlgorithmException
+     * @throws KeyStoreException
+     * @throws IOException
+     * @throws CertificateException
+     * @throws UnrecoverableKeyException
+     */
+    public static RSAPrivateKey getPrivateKeyFromPKCS12(String filepath, String alias, String password) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
+        return getPrivateKey(filepath, alias, password, "PKCS12");
+    }
+
+    /**
+     * 读取key（私钥）
+     *
+     * @param filepath 私钥路径
+     * @param alias    证书别名 可空
+     * @param password 证书密码
+     * @param type     证书格式
+     * @return
+     * @throws NoSuchAlgorithmException
+     * @throws KeyStoreException
+     * @throws IOException
+     * @throws CertificateException
+     * @throws UnrecoverableKeyException
+     */
+    public static RSAPrivateKey getPrivateKey(String filepath, String alias, String password, String type) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
+        KeyStore ks = KeyStore.getInstance(type);
         FileInputStream fileInputStream = null;
         try {
             fileInputStream = new FileInputStream(filepath);
             ks.load(fileInputStream, password.toCharArray());
+            if (StrUtil.isEmpty(alias)) {
+                Enumeration<?> aliases = ks.aliases();
+                if (aliases != null) {
+                    if (aliases.hasMoreElements()) {
+                        alias = (String) aliases.nextElement();
+                    }
+                }
+            }
         } finally {
             if (fileInputStream != null) {
                 fileInputStream.close();