dbの文字化け回避対応

文字化け対策

useUnicode=true\&characterEncoding=utf\-8\&characterSetResults=utf\-8

properties(外部設定した場合)

useUnicode=true&characterEncoding=UTF-8&characterSetResults=UTF-8

xml

useUnicode=true&characterEncoding=UTF-8&characterSetResults=UTF-8

```
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/blogdatabase?上記はすべてここの部分に記載されることを想定
```

https://stackoverflow.com/questions/18163328/jpa-utf-8-characters-not-persisted