如何在不依赖数据库的情况下启动spring-boot应用程序?

I am using "Spring-boot + Hibernate4 + mysql" for my application. As part of which I have a requirement where my sprint-boot app should be able to start even when database is down. Currently it gives the below exception when I try to start my spring boot app without DB being up.I am using "Spring-boot + Hibernate4 + mysql" f