两个实用的方法从Base64字符串生成RSAPublicKey及RSAPrivatekey

     public static RSAPublicKey getRSAPublidKeyBybase64(String base64s) {
         X509EncodedKeySpec keySpec = new X509EncodedKeySpec(CodeUtils.base64Decode(base64s));
         RSAPublicKey publicKey = null;
 　　　　　KeyFactory keyFactory = KeyFactory.getInstance("RSA");
         try {
             publicKey = (RSAPublicKey)keyFactory.generatePublic(keySpec);
         } catch (InvalidKeySpecException var4) {
             LOGGER.error("base64编码=" + base64s + "转RSA公钥失败", var4);
         }
 
         return publicKey;
     }
 
     public static RSAPrivateKey getRSAPrivateKeyBybase64(String base64s) {
         PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(CodeUtils.base64Decode(base64s));
         RSAPrivateKey privateKey = null;
         KeyFactory keyFactory = KeyFactory.getInstance("RSA");
         try {
             privateKey = (RSAPrivateKey)keyFactory.generatePrivate(keySpec);
         } catch (InvalidKeySpecException var4) {
             LOGGER.error("base64编码=" + base64s + "转RSA私钥失败", var4);
         }
 
         return privateKey;
     }