class MyInstantiationAwareBeanPostProcessor implements InstantiationAwareBeanPostProcessor {

    @Override
    public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
        if (beanClass == DataBase.class) {
            System.out.println("正在准备实例化: " + beanName);
        }
        return null;
    }

    @Override
    public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
        if (bean instanceof DataBase) {
            ((DataBase) bean).setPostInstantiationFlag(true);
            System.out.println("Bean " + beanName + " 已实例化!");
            return true;
        }
        return true;
    }

    @Override
    public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) throws BeansException {<FILL_FUNCTION_BODY>}
}

        if (bean instanceof DataBase) {
            MutablePropertyValues mpvs = (MutablePropertyValues) pvs;
            mpvs.addPropertyValue("password", "******");
            System.out.println(beanName + "的密码已被屏蔽:");
        }
        return pvs;
    
<no_super_class>