使用springboot jpa，項目啓動的時候有個warn的log：
2019-04-03 14:05:59: WARN [main] o.s.b.a.o.j.JpaBaseConfiguration$JpaWebConfiguration$JpaWebMvcConfiguration JpaBaseConfiguration.java:234 - spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
解決方案，在配置文件中加入下面這個：
spring.jpa.open-in-view=false
加入後並不會對項目產生不好的影響，具體的可以參考stackoverflow上的解答spring.jpa.open-in-view。