1.IDEA interface font settings
File | Settings | Appearance & Behavior | Appearance, set the font size is inside the oval
2. Code font size
File | Settings | Editor | Font
3. Global encoding format set
File | Settings | Editor | File Encodings
4. Maven configuration
File | Settings | Build, Execution, Deployment | Build Tools | Maven
5.JDK configuration
File | Other Settings | Struture fro New Project
Completed.