Encoding-java inserts garbled data into mySql

! (Optional) why does it change to utf8 after I execute the following command line, but after I exit mysql, it becomes gbk encoded again? mysql & gt; SETcharacter_set_clientutf8; mysql & gt; SETcharacter_set_resultsutf8; mysql & gt; SETcharacter_set_connectionu encoding mysql Image java

Why is it changed to utf8 after I run the following command line, but it is changed to gbk encoding after I quit mysql and enter it again?
Mysql> SET character_set_client = utf8;

Mysql> SET character_set_results = utf8;

Mysql> SET character_set_connection = utf8;