<bean id="propertyConfigurer"

class="com.datasure.util.filter.EncryptablePropertyPlaceholderConfigurer">

<property name="locations">

<list><value>classpath:jdbc.properties</value></list>

</property>

</bean>

public class EncryptablePropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {

    private static final String key = "helloworld";

    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());

            }

        }

    }