api http://www.ruanyifeng.com/blog/2014/05/restful_api.html
测试api： https://www.getpostman.com/
spring data jpa： https://docs.spring.io/spring-data/jpa/docs/2.0.7.RELEASE/reference/html/#dependencies.spring-boot
idea hibernate jpa 生成实体类：：https://blog.csdn.net/lafengwnagzi/article/details/54095119