解決問題：java連不上MySQL8.0的問題

問題1：Client does not support authentication protocol requested by Server；… 問題2：Unknown initial character set index ‘255’ received from server… 問題3：MySQL8.0連接必要url語句 問題4：調用方法重複 運行問題1： 解決方法：（3句注意分號，wy123

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