|  |  | 
 |  |  | @Component | 
 |  |  | public class RSAPublicKeyExample { | 
 |  |  |  | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 数据解密 | 
 |  |  |      * | 
 |  |  |      * @param encryptedData | 
 |  |  |      * @return | 
 |  |  |      */ | 
 |  |  |     public String decryptedData(String encryptedData, String pri_key) { | 
 |  |  |         String privateKeyString = "私钥的Base64编码字符串"; // 后端私钥的Base64编码字符串 | 
 |  |  |  | 
 |  |  |         try { | 
 |  |  |             // 将私钥Base64编码字符串转换为PrivateKey对象 | 
 |  |  |             byte[] privateKeyBytes = Base64.getDecoder().decode(pri_key); | 
 |  |  |             PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(privateKeyBytes); | 
 |  |  |             KeyFactory keyFactory = KeyFactory.getInstance("RSA"); | 
 |  |  |             PrivateKey privateKey = keyFactory.generatePrivate(keySpec); | 
 |  |  |  | 
 |  |  |             // 使用私钥解密数据 | 
 |  |  |             Cipher decryptCipher = Cipher.getInstance("RSA"); | 
 |  |  |             decryptCipher.init(Cipher.DECRYPT_MODE, privateKey); | 
 |  |  |             byte[] decryptedBytes = decryptCipher.doFinal(Base64.getDecoder().decode(encryptedData)); | 
 |  |  |  | 
 |  |  |             // 解密后的数据 | 
 |  |  |             String decryptedData = new String(decryptedBytes); | 
 |  |  |             System.out.println("解密后的数据:" + decryptedData); | 
 |  |  |             return decryptedData; | 
 |  |  |         } catch (Exception e) { | 
 |  |  |             log.error("解密报错了:{}", e.getMessage()); | 
 |  |  |         } | 
 |  |  |         return null; | 
 |  |  |     } | 
 |  |  | // | 
 |  |  | //    /** | 
 |  |  | //     * 数据解密 | 
 |  |  | //     * | 
 |  |  | //     * @param encryptedData | 
 |  |  | //     * @return | 
 |  |  | //     */ | 
 |  |  | //    public String decryptedData(String encryptedData, String pri_key) { | 
 |  |  | //        String privateKeyString = "私钥的Base64编码字符串"; // 后端私钥的Base64编码字符串 | 
 |  |  | // | 
 |  |  | //        try { | 
 |  |  | //            // 将私钥Base64编码字符串转换为PrivateKey对象 | 
 |  |  | //            byte[] privateKeyBytes = Base64.getDecoder().decode(pri_key); | 
 |  |  | //            PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(privateKeyBytes); | 
 |  |  | //            KeyFactory keyFactory = KeyFactory.getInstance("RSA"); | 
 |  |  | //            PrivateKey privateKey = keyFactory.generatePrivate(keySpec); | 
 |  |  | // | 
 |  |  | //            // 使用私钥解密数据 | 
 |  |  | //            Cipher decryptCipher = Cipher.getInstance("RSA"); | 
 |  |  | //            decryptCipher.init(Cipher.DECRYPT_MODE, privateKey); | 
 |  |  | //            byte[] decryptedBytes = decryptCipher.doFinal(Base64.getDecoder().decode(encryptedData)); | 
 |  |  | // | 
 |  |  | //            // 解密后的数据 | 
 |  |  | //            String decryptedData = new String(decryptedBytes); | 
 |  |  | //            System.out.println("解密后的数据:" + decryptedData); | 
 |  |  | //            return decryptedData; | 
 |  |  | //        } catch (Exception e) { | 
 |  |  | //            log.error("解密报错了:{}", e.getMessage()); | 
 |  |  | //        } | 
 |  |  | //        return null; | 
 |  |  | //    } | 
 |  |  | // | 
 |  |  | //    /** | 
 |  |  | //     * 要加密的明文数据 | 
 |  |  | //     * | 
 |  |  | //     * @param plainText | 
 |  |  | //     * @return | 
 |  |  | //     */ | 
 |  |  | //    public String encryptedData(String plainText, String pub_key) { | 
 |  |  | //        log.info("需要加密的数据:{}", plainText); | 
 |  |  | //        try { | 
 |  |  | // | 
 |  |  | //            byte[] publicKeyBytes = Base64.getDecoder().decode(pub_key); | 
 |  |  | //            X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKeyBytes); | 
 |  |  | //            KeyFactory keyFactory = KeyFactory.getInstance("RSA"); | 
 |  |  | //            PublicKey publicKey = keyFactory.generatePublic(keySpec); | 
 |  |  | // | 
 |  |  | //            // 使用公钥加密数据 | 
 |  |  | //            Cipher encryptCipher = Cipher.getInstance("RSA"); | 
 |  |  | //            encryptCipher.init(Cipher.ENCRYPT_MODE, publicKey); | 
 |  |  | //            byte[] encryptedBytes = encryptCipher.doFinal(plainText.getBytes()); | 
 |  |  | // | 
 |  |  | //            // 将加密后的数据转换为Base64编码的字符串 | 
 |  |  | //            String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes); | 
 |  |  | //            log.info("Base64加密后的数据:{}", encryptedText); | 
 |  |  | //            encryptedText = URLEncoder.encode(encryptedText, StandardCharsets.UTF_8.toString()); | 
 |  |  | //            log.info("URLEncoder编码后的数据:{}", encryptedText); | 
 |  |  | //            String decodedString = URLDecoder.decode(encryptedText, "UTF-8"); | 
 |  |  | //            log.info("URLEncoder解码后的数据:{}", decodedString); | 
 |  |  | //            return encryptedText; | 
 |  |  | //        } catch (Exception e) { | 
 |  |  | //            log.error("加密失败了:{}", e.getMessage()); | 
 |  |  | //        } | 
 |  |  | //        return null; | 
 |  |  | //    } | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 要加密的明文数据 | 
 |  |  | 
 |  |  |      * @return | 
 |  |  |      */ | 
 |  |  |     public String encryptedData(String plainText, String pub_key) { | 
 |  |  |         log.info("需要加密的数据:{}", plainText); | 
 |  |  |         try { | 
 |  |  |  | 
 |  |  |             byte[] publicKeyBytes = Base64.getDecoder().decode(pub_key); | 
 |  |  |             X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKeyBytes); | 
 |  |  |             KeyFactory keyFactory = KeyFactory.getInstance("RSA"); | 
 |  |  |             PublicKey publicKey = keyFactory.generatePublic(keySpec); | 
 |  |  |  | 
 |  |  |             // 使用公钥加密数据 | 
 |  |  |             Cipher encryptCipher = Cipher.getInstance("RSA"); | 
 |  |  |             Cipher encryptCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); | 
 |  |  |             encryptCipher.init(Cipher.ENCRYPT_MODE, publicKey); | 
 |  |  |             byte[] encryptedBytes = encryptCipher.doFinal(plainText.getBytes()); | 
 |  |  |             byte[] encryptedBytes = encryptCipher.doFinal(plainText.getBytes(StandardCharsets.UTF_8)); | 
 |  |  |  | 
 |  |  |             // 将加密后的数据转换为Base64编码的字符串 | 
 |  |  |             String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes); | 
 |  |  |             log.info("Base64加密后的数据:{}", encryptedText); | 
 |  |  |             encryptedText = URLEncoder.encode(encryptedText, StandardCharsets.UTF_8.toString()); | 
 |  |  |             log.info("URLEncoder编码后的数据:{}", encryptedText); | 
 |  |  |             String decodedString = URLDecoder.decode(encryptedText, "UTF-8"); | 
 |  |  |             log.info("URLEncoder解码后的数据:{}", decodedString); | 
 |  |  |             return encryptedText; | 
 |  |  |             // URL Safe Base64 编码 | 
 |  |  |             return Base64.getUrlEncoder().encodeToString(encryptedBytes); | 
 |  |  |         } catch (Exception e) { | 
 |  |  |             log.error("加密失败了:{}", e.getMessage()); | 
 |  |  |             log.error("加密失败: {}", e.getMessage()); | 
 |  |  |         } | 
 |  |  |         return null; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 数据解密 | 
 |  |  |      * | 
 |  |  |      * @param encryptedData | 
 |  |  |      * @return | 
 |  |  |      */ | 
 |  |  |     public String decryptedData(String encryptedData, String pri_key) { | 
 |  |  |         try { | 
 |  |  |             // 将私钥Base64编码字符串转换为PrivateKey对象 | 
 |  |  |             byte[] privateKeyBytes = Base64.getDecoder().decode(pri_key); | 
 |  |  |             PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(privateKeyBytes); | 
 |  |  |             KeyFactory keyFactory = KeyFactory.getInstance("RSA"); | 
 |  |  |             PrivateKey privateKey = keyFactory.generatePrivate(keySpec); | 
 |  |  |  | 
 |  |  |             // URL Safe Base64 解码 | 
 |  |  |             byte[] cipherBytes = Base64.getUrlDecoder().decode(encryptedData); | 
 |  |  |  | 
 |  |  |             // 使用私钥解密数据 | 
 |  |  |             Cipher decryptCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); | 
 |  |  |             decryptCipher.init(Cipher.DECRYPT_MODE, privateKey); | 
 |  |  |             byte[] decryptedBytes = decryptCipher.doFinal(cipherBytes); | 
 |  |  |  | 
 |  |  |             return new String(decryptedBytes, StandardCharsets.UTF_8); | 
 |  |  |         } catch (Exception e) { | 
 |  |  |             log.error("解密失败: {}", e.getMessage()); | 
 |  |  |         } | 
 |  |  |         return null; | 
 |  |  |     } |