Spring-Boot, Can't save unicode string in MySql using spring-data JPA

In your /etc/mysql/my.cnf file change the following.

[mysql]
default-character-set=utf8
[mysqld]
character-set-server=utf8

Keep your hibernate configuration Like this

jdbc:mysql://localhost:3306/dbname?useUnicode=yes&characterEncoding=UTF-8

And Change your DB Collation Like this

ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

More information : Link

See "question marks" in http://stackoverflow.com/questions/38363566/trouble-with-utf8-characters-what-i-see-is-not-what-i-stored .

Also,

⚈  spring.jpa.properties.hibernate.connection.characterEncoding=utf-8 
⚈  spring.jpa.properties.hibernate.connection.CharSet=utf-8 
⚈  spring.jpa.properties.hibernate.connection.useUnicode=true