Eclipse連接數據庫報錯：Unknown initial character set index 255 received from server.

網友這樣說：https://blog.csdn.net/txwtech/article/details/80787886?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522159037707319724835820729%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=159037707319724835820729&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_v2~rank_v28-1-80787886.first_rank_v2_rank_v28&utm_term=Unknown+initial+character+set+

寫的不錯，但是不適合我。

最終解決：

參考自：
https://blog.csdn.net/wx_lanyu/article/details/83718226?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522159037707319195188433063%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=159037707319195188433063&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-5-83718226.first_rank_v2_rank_v28&utm_term=Unknown+initial+character+set+
 

java.sql.SQLException: Unknown initial character set index ‘255’ received from server.

編碼不匹配的原因

直接在連接的URL後加上

?useUnicode=true&characterEncoding=utf8

就可以了