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