Properties配置文件数据加密

朱雀 2022-06-14 05:07 272阅读 0赞

> 在一些情况下,需要对properties中的配置数据进行加密。比如Mysql数据库的密码，不应该以明文的形式直接保存在properties中，应该以密文的形式保存.

### PropertiesUtil ###

用于读取properties配置文件的数据,并且将加密的密文进行解密.

/** * Parsing The Perperties Configuration File */
    public final class PropertiesUtil extends PropertyPlaceholderConfigurer { 
        private static final byte[] KEY = { -81, 0, 105, 7, -32, 26, -49, 88 };
        private static Map<String, String> ctxPropertiesMap; // 用于存放perperties中的数据
        private List<String> decryptProperties; // 用于存放需要解密的key
    
        @Override
        protected void loadProperties(Properties props) throws IOException {
            super.loadProperties(props);
            ctxPropertiesMap = new HashMap<String, String>();
            for (Object key : props.keySet()) {
                String keyStr = key.toString();
                String value = props.getProperty(keyStr);
                if (decryptProperties != null && decryptProperties.contains(keyStr)) {
                    value = SecurityUtil.decryptDes(value); // 解密
                    props.setProperty(keyStr, value); // 设置解密后的明文数据
                }
                ctxPropertiesMap.put(keyStr, value);
            }
        }
    
        /** * @param decryptPropertiesMap * the decryptPropertiesMap to set */
        public void setDecryptProperties(List<String> decryptProperties) {
            this.decryptProperties = decryptProperties;
        }
    
        /** * Get a value based on key , if key does not exist , null is returned * * @param key * @return */
        public static String getString(String key) {
            try {
                return ctxPropertiesMap.get(key);
            } catch (MissingResourceException e) {
                return null;
            }
        }
    
        /** * 根据key获取值 * * @param key * @return */
        public static int getInt(String key) {
            return Integer.parseInt(ctxPropertiesMap.get(key));
        }
    
        /** * 根据key获取值 * * @param key * @param defaultValue * @return */
        public static int getInt(String key, int defaultValue) {
            String value = ctxPropertiesMap.get(key);
            if (StringUtils.isBlank(value)) {
                return defaultValue;
            }
            return Integer.parseInt(value);
        }
    
        /** * 根据key获取值 * * @param key * @param defaultValue * @return */
        public static boolean getBoolean(String key, boolean defaultValue) {
            String value = ctxPropertiesMap.get(key);
            if (StringUtils.isBlank(value)) {
                return defaultValue;
            }
            return new Boolean(value);
        }
    
        public static void main(String[] args) {
            String encrypt = SecurityUtil.encryptDes("12345", KEY);
            System.out.println(encrypt);
            System.out.println(SecurityUtil.decryptDes(encrypt, KEY));
        }
    }

### jdbc.properties ###

db.driver=com.mysql.jdbc.Driver
    db.reader.url=jdbc:mysql://127.0.0.1:3306/mydatabase
    db.reader.username=root
    db.reader.password=siUZ0QNpCcq=

### spring中的配置文件 ###

<bean class="com.spring.util.PropertiesUtil">
            
            <property name="locations">
                <list>
                    <value>classpath:config/jdbc.properties</value>
                </list>
            </property>
    
            
            <property name="decryptProperties">
                <array>
                    
                    <value>db.reader.password</value>
                </array>
            </property>
        </bean>
    
        
        <bean id="connectionConfig" class="com.spring.bean.ConnectionConfig">
            <property name="password" value="${db.reader.password}" />
        </bean>

### 输出的密码,是解密后的明文 ###

#### 测试代码 ####

public static void main(String[] args) {
            ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:spring-*.xml");
            System.out.println(applicationContext.getBean("connectionConfig"));
    }

#### 测试输出结果 ####

ConnectionConfig \[password=12345\]

### 测试代码下载 ###

[代码下载][Link 1]

[Link 1]: http://download.csdn.net/detail/zbw18297786698/9866707