1. 配置 utf-8 编码

1.1 配置当前项目

随便创建一个项目

1.1.1 File–>Settings–>Editor–>File Encoding

Transparent native-to-ascii conversion:
java默认采用iso8859-1编码读取，勾选这个后，实际存储变为ASCII码字符，这样是能正常解析的；
这其实只是编辑器的优化而已
properties files 本身的编码：
如果用iso8859-1，文本编辑器打开后中文字符乱码，读取也是乱码（这显然无法识别）；
如果是utf-8编码，文本编辑器打开后中文字符显示正常，读取还是乱码，上面讲到了，底层读取的编码为iso8859-1。
撇开文本编码，存储成ASCII字符是正常的，java也会识别uxxxx，这也是建议勾选的原因。

1.1.2 File–>Settings–>Build,Execution,Deployment --> Compiler --> Java Compiler

1.2 配置新建项目(必要配置)

1.2.1 File–>New Projects Setup–>Settings for New Projects

1.2.2 File–>New Projects Setup–>Settings for New Projects–>Settings–>Build,Execution,Deployment --> Compiler --> Java Compiler

1.2.3 File–>New Projects Setup–>Settings for New Projects–>Settings–>Build,Execution,Deployment --> Compiler --> Java Compiler

1.2.4 File–>New Projects Setup–>Settings for New Projects–>Settings–>Build,Execution,Deployment --> Build Tools–> Maven

配置新建项目使用的maven工具配置和库

1.2.5 File–>New Projects Setup–>Settings for New Projects–>Structure

Project Settings–>Project Platform Settings–>SDKs