springboot2.x 重写默认hikar数据源实现密码加密

1. application.yml 保持默认hikar配置不变
2. 构建DBPasswordDe类实现BeanPostProcessor 
3. 可以采用自定义的加解密方式

@Component
public class DBPasswordDe implements BeanPostProcessor {

    public static String DB_PREFIX ="spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties";

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName){
        if(DB_PREFIX.equals(beanName)) {
            DataSourceProperties dataSourceProperties=(DataSourceProperties)bean;
            dataSourceProperties.setPassword(PasswordUtil.dePasswdPem(dataSourceProperties.getPassword()));
            return dataSourceProperties;
        }
        return bean;
    }
}