主要参考博客：https://blog.csdn.net/sz85850597/article/details/80396321

主要使用的jasypt-spring-boot这个开源工具。

引入maven依赖

配置加解密Bean

@Configuration
public class EncryptionPropertyConfig {

    @Bean(name = "encryptablePropertyResolver")
    public EncryptablePropertyResolver encryptablePropertyResolver() {
        return new EncryptionPropertyResolver();
    }

    class EncryptionPropertyResolver implements EncryptablePropertyResolver {

        @Override
        public String resolvePropertyValue(String value) {
            if (StringUtils.isBlank(value)) {
                return value;
            }
            // 值以DES@开头的均为DES加密,需要解密
            if (value.startsWith("DES@")) {
                return resolveDESValue(value.substring(4));
            }
            // 不需要解密的值直接返回
            return value;
        }

        private String resolveDESValue(String value) {
            // 自定义DES密文解密
            return DesUtil.decrypt(value, DesUtil.KEY);
        }

    }
}

编写加解密工具类

之前在github上找到的工具类，抱歉之前没留下原地址。

@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class DesUtil {
    /** 默认key */
    public final static String KEY = "ScAKC0XhadTHT3Al0QIDAQAB";

    /**
     * DES加密
     *
     *
     * @param data
     * 				待加密字符串
     * @param key
     * 				校验位
     * @return
     */
    public static String encrypt(String data,String key) {
        String encryptedData = null;
        try {
            // DES算法要求有一个可信任的随机数源
            SecureRandom sr = new SecureRandom();
            DESKeySpec deskey = new DESKeySpec(key.getBytes());
            // 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(deskey);
            // 加密对象
            Cipher cipher = Cipher.getInstance("DES");
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);
            // 加密，并把字节数组编码成字符串
            encryptedData = new sun.misc.BASE64Encoder().encode(cipher.doFinal(data.getBytes()));
        } catch (Exception e) {
            throw new RuntimeException("加密错误，错误信息：", e);
        }
        return encryptedData;
    }

    /**
     * DES解密
     *
     *
     * @param cryptData
     * 						待解密密文
     * @param key
     * 						校验位
     * @return
     */
    public static String decrypt(String cryptData,String key) {
        String decryptedData = null;
        try {
            // DES算法要求有一个可信任的随机数源
            SecureRandom sr = new SecureRandom();
            DESKeySpec deskey = new DESKeySpec(key.getBytes());
            // 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey secretKey = keyFactory.generateSecret(deskey);
            // 解密对象
            Cipher cipher = Cipher.getInstance("DES");
            cipher.init(Cipher.DECRYPT_MODE, secretKey, sr);
            // 把字符串解码为字节数组，并解密
            decryptedData = new String(cipher.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(cryptData)));
        } catch (Exception e) {
            throw new RuntimeException("解密错误，错误信息：", e);
        }
        return decryptedData;
    }


    public static void main(String[] args) {
        System.out.println("url::"+encrypt("jdbc:oracle:thin:@127.0.0.1:1521:xe",KEY));
        System.out.println("username::"+encrypt("admin",KEY));
        System.out.println("password::"+encrypt("admin",KEY));
    }
}

工具类中的main方法执行结果为：

修改properties文件

运行项目测试通过！