Getting small learning program 21 - after the end of each interface development springboot

• 1 Unsupported character encoding ''
  described application.properties database connection is configured, should be

spring.datasource.url=jdbc:mysql://localhost:3306/news?useUnicode=true&&characterEncoding=UTF-8&autoReconnect=true

• ... 2 Could not create connection to database server Attempted reconnect 3 times Giving up the lack of explanation: time zone configuration
  should be changed to the code above:

spring.datasource.url=jdbc:mysql://localhost:3306/news?useUnicode=true&&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=UTC

• 3 to modify the default annotations
  for FIG operation, and to click Apply (if annotation template modification method is not selected Types, select Methods)
• 4 eclipse Chinese source comments garbled
• 5 items uploaded to github
• 6 github project address