diff --git a/README.md b/README.md
index db6ecaa..8f14f65 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@
 
 
 ### 使用
->yexuejc.base.version=1.2.8
+>yexuejc.base.version=1.2.9
 
 pom.xml
 ```
diff --git a/UPDATE.md b/UPDATE.md
index aff1f9f..7e601bd 100644
--- a/UPDATE.md
+++ b/UPDATE.md
@@ -1,6 +1,20 @@
 yexuejc-base 更新记录
 ------------------
 
+#### version ：1.2.9
+**time：2018-12-29 14:51:33** <br/>
+**branch：** master    <br/>
+**update：**     <br/>
+>1. 获取RSA密钥增加以输入流的形式获取密钥
+
+#
+#### version ：1.2.6
+**time：2018-12-21 14:58:49** <br/>
+**branch：** master    <br/>
+**update：**     <br/>
+>1. RSA 验签增加初始化方法
+
+#
 #### version ：1.2.8
 **time：2018-12-28 20:10:14** <br/>
 **branch：** master    <br/>
diff --git a/pom.xml b/pom.xml
index 791015d..aa6f90f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.yexuejc.base</groupId>
     <artifactId>yexuejc-base</artifactId>
-    <version>1.2.8</version>
+    <version>1.2.9</version>
 
     <name>${project.artifactId}</name>
 
diff --git a/src/main/java/com/yexuejc/base/encrypt/RSA2.java b/src/main/java/com/yexuejc/base/encrypt/RSA2.java
index 20f516b..2e86afd 100644
--- a/src/main/java/com/yexuejc/base/encrypt/RSA2.java
+++ b/src/main/java/com/yexuejc/base/encrypt/RSA2.java
@@ -5,6 +5,7 @@ import com.yexuejc.base.util.StrUtil;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.io.InputStream;
 import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.NoSuchAlgorithmException;
@@ -44,6 +45,21 @@ public class RSA2 {
         return (RSAPublicKey) c.getPublicKey();
     }
 
+    /**
+     * 得到公钥
+     *
+     * @param pubKeyIn 密钥文件流
+     * @return
+     * @throws CertificateException
+     */
+    public static RSAPublicKey getPublicKey(InputStream pubKeyIn) throws CertificateException {
+        //通过证书,获取公钥
+        CertificateFactory cf = null;
+        cf = CertificateFactory.getInstance("X.509");
+        Certificate c = cf.generateCertificate(pubKeyIn);
+        return (RSAPublicKey) c.getPublicKey();
+    }
+
     /**
      * 读取JKS格式的key（私钥）keystore格式
      *
@@ -61,6 +77,23 @@ public class RSA2 {
         return getPrivateKey(filepath, alias, password, "JKS");
     }
 
+    /**
+     * 读取JKS格式的key（私钥）keystore格式
+     *
+     * @param priKeyIn 私钥文件流
+     * @param alias    证书别名
+     * @param password 证书密码
+     * @return
+     * @throws NoSuchAlgorithmException
+     * @throws KeyStoreException
+     * @throws IOException
+     * @throws CertificateException
+     * @throws UnrecoverableKeyException
+     */
+    public static RSAPrivateKey getPrivateKey(InputStream priKeyIn, String alias, String password) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
+        return getPrivateKey(priKeyIn, alias, password, "JKS");
+    }
+
     /**
      * 读取PKCS12格式的key（私钥）pfx格式
      *
@@ -78,6 +111,23 @@ public class RSA2 {
         return getPrivateKey(filepath, alias, password, "PKCS12");
     }
 
+    /**
+     * 读取PKCS12格式的key（私钥）pfx格式
+     *
+     * @param priKeyIn 私钥文件流
+     * @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(InputStream priKeyIn, String alias, String password) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
+        return getPrivateKey(priKeyIn, alias, password, "PKCS12");
+    }
+
     /**
      * 读取key（私钥）
      *
@@ -114,4 +164,32 @@ public class RSA2 {
         return (RSAPrivateKey) ks.getKey(alias, password.toCharArray());
     }
 
+    /**
+     * 读取key（私钥）
+     *
+     * @param priKeyIn 私钥文件流
+     * @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(InputStream priKeyIn, String alias, String password, String type) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
+        KeyStore ks = KeyStore.getInstance(type);
+        ks.load(priKeyIn, password.toCharArray());
+        if (StrUtil.isEmpty(alias)) {
+            Enumeration<?> aliases = ks.aliases();
+            if (aliases != null) {
+                if (aliases.hasMoreElements()) {
+                    alias = (String) aliases.nextElement();
+                }
+            }
+        }
+        return (RSAPrivateKey) ks.getKey(alias, password.toCharArray());
+    }
+
 }