spring-jdbc文件数据库配置加密

     一般spring容器启动时，通过PropertyPlaceholderConfigurer类读取jdbc.properties文件里的数据库配置信息。

通过这个原理，我们把加密后的数据库配置信息放到jdbc.properties文件里，然后自定义一个继承PropertyPlaceholderConfigurer的类，实现解密，把解密后的信息又放回去。最后在配置DataSource时，还是用占位符${}取配置信息。

 

jdbc.properties文件内容：

jdbc.driverClassName = 4A490AA9B8CD7DBD61E70367C868F950541890F991000CD76A707177A0A507B9
jdbc.url = FA0DD23D31BCF4C6058626849C4611455A74B444893626DE9CF7D1E05F15586C54C098BFA29BC54A
jdbc.username = 5DE376A122083A8945FF13A1D5AFD452
jdbc.password = 5DE376A122083A8945FF13A1D5AFD452

 

 

自定义的取加密信息的类EncryptablePropertyPlaceholderConfigurer

public class EncryptablePropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
	private static final String key = "0002000200020002";

	protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props)
		throws BeansException {
			try {
				Des des = new Des();
				String username = props.getProperty("jdbc.username");
				if (username != null) {
					props.setProperty("jdbc.username", des.Decrypt(username, des.hex2byte(key)));
				}
				
				String password = props.getProperty("jdbc.password");
				if (password != null) {
					props.setProperty("jdbc.password", des.Decrypt(password, des.hex2byte(key)));
				}
				
				String url = props.getProperty("jdbc.url");
				if (url != null) {
					props.setProperty("jdbc.url", des.Decrypt(url, des.hex2byte(key)));
				}
				
				String driverClassName = props.getProperty("jdbc.driverClassName");
				if(driverClassName != null){
					props.setProperty("jdbc.driverClassName", des.Decrypt(driverClassName, des.hex2byte(key)));
				}
				
				super.processProperties(beanFactory, props);
			} catch (Exception e) {
				e.printStackTrace();
				throw new BeanInitializationException(e.getMessage());
			}
		}

 

Des.java是一个用Des算法加密和解密的工具类

	//加密
	public static String Encrypt(String str, byte[] key){
		Security.addProvider(new com.sun.crypto.provider.SunJCE());
		byte[] encrypt = encryptMode(key, str.getBytes());
		return byte2hex(encrypt);
	}

	//解密
	public static String Decrypt(String str, byte[] key){
		Security.addProvider(new com.sun.crypto.provider.SunJCE());
		byte[] decrypt = decryptMode(key, hex2byte(str)); 
		return new String(decrypt);
	}

 

 

spring配置：

 <bean id="propertyConfigurer"  
       class="com.eeds.core.security.datasource.EncryptablePropertyPlaceholderConfigurer">  
        <property name="locations">  
            <list>  
                <value>classpath:config/spring/jdbc-test.properties</value>  
            </list>  
        </property>  
    </bean>

 

	<!-- 测试环境 -->
	<bean id="econsoleDS" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass">
			<value>${jdbc.driverClassName}</value>
		</property>			 	
		<property name="jdbcUrl">
			<value>${jdbc.url}</value>
		</property>	
		<property name="user">
			<value>${jdbc.username}</value>
		</property>
		<property name="password">
			<value>${jdbc.password}</value>
		</property>
                 </bean>

 

 

 参考资料：

Spring配置密码加密
http://tech.it168.com/oldarticle/2007-03-07/200703071252520_3.shtml
http://blog.csdn.net/dyyaries/article/details/7399414