try-with-resources

参考博客：

https://www.jianshu.com/p/3022f7daa2a4     try-with-resources 和 multi-catch

https://www.jianshu.com/p/97fdbd48f581     增强 try （Try-with-resources）

https://www.jianshu.com/p/08d03356ff8a     try-with-resources 的理解

 

1.try with resources