idea小技巧

1.不使用import *：Setting=>Editor=>Code Style=>Java=>Imports=>Class count to use/Names count to...，设置个数

2.自动移除无用的import：Setting=>Editor=>General=>Auto Import=>Optimize imports on the fly

3.设置文件头：Setting=>Editor=>Code Style=>File and Code Templates

4.自动生成serialVersionUID：Setting=>Editor=>Inspections=>Java=>Serialization issues=>Serializable class without 'serialVersionUID'

5.设置编码格式：Editor=>File Encodings=>IDE Encoding、Project Encoding；最下面设置properties文件格式，设置properties中文

6.设置JDK默认版本：Other Settings=>Default Settings、Default Project Structure，解决每次idea重启JDK版本都恢复默认1.5