diff --git a/common/src/main/java/work/xuye/common/utils/signature/RSASignatureService.java b/common/src/main/java/work/xuye/common/utils/signature/RSASignatureService.java
index 661bfd0..dc26589 100644
--- a/common/src/main/java/work/xuye/common/utils/signature/RSASignatureService.java
+++ b/common/src/main/java/work/xuye/common/utils/signature/RSASignatureService.java
@@ -22,6 +22,16 @@ import java.security.spec.X509EncodedKeySpec;
 
 class RSASignatureService extends AbstractSignatureService {
 
+    private RSASignatureService() {
+
+    }
+
+    public static AbstractSignatureService getInstance(SignatureConfig signatureConfig) throws GeneralSecurityException {
+        RSASignatureService result = new RSASignatureService();
+        result.init(signatureConfig);
+        return result;
+    }
+
     @Override
     public String signatureByPriKey(String content) throws GeneralSecurityException {
         if (signatureContext == null) {
diff --git a/common/src/main/java/work/xuye/common/utils/signature/SignatureFactory.java b/common/src/main/java/work/xuye/common/utils/signature/SignatureFactory.java
index 9c8100b..8f25643 100644
--- a/common/src/main/java/work/xuye/common/utils/signature/SignatureFactory.java
+++ b/common/src/main/java/work/xuye/common/utils/signature/SignatureFactory.java
@@ -20,13 +20,12 @@ public class SignatureFactory {
 
         switch (SignatureEnumGroup.KeyAlgorithm.valueOf(signatureConfig.getKeyAlgorithm())) {
             case RSA:
-                result = new RSASignatureService();
+                result = RSASignatureService.getInstance(signatureConfig);
                 break;
         }
         if (result == null) {
             throw new RuntimeException(String.format("不支持的签名方式,signatureConfig:%s", signatureConfig));
         }
-        result.init(signatureConfig);
         return result;
 
     }