1.錯誤現象
Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
2.解決辦法
MySQL沒有啟動成功
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Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 解決
解決com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: