com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure. The driver has no-CodePudding

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com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure. The driver has no

Time：08-27

I have a Servlet and jsp project in which it takes the name and pass. when I want it to save it in the MySQL database using JDBC mysql-connector, it shows this error. Please help me I'm stuck in this for a long time.
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