spring配置文件加密方法示例

public class EncryptPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
	 private String[] encryptPropNames = {"username", "password"}; 

	@Override
	protected void processProperties(ConfigurableListableBeanFactory beanFactory,
			Properties props) throws BeansException {
		try {
		for (int i = 0;i<encryptPropNames.length;i++){
			 String value = props.getProperty(encryptPropNames[i]);
       if (value != null) {
					props.setProperty(encryptPropNames[i],new String(DES.decrypt(new BASE64Decoder().decodeBuffer(value), "解密秘钥")));
       }
      
		}
		super.processProperties(beanFactory, props);
		} catch (Exception e) {
			 e.printStackTrace();
       throw new BeanInitializationException(e.getMessage());
		}
	} 
}

<!-- class填写刚才那段代码的类路径-->
<bean id="propertyConfigurer" class="com.**.EncryptPropertyPlaceholderConfigurer"> 
      <property name="locations">
        <list>
          <value>classpath:jdbc.properties</value>
        </list>
      </property>
  </bean>