Solutions to connection failures and errors when accessing mysql8 using the SSM project

At this time, the first thing to do is to mysql The version number of the driver is changed to the following settings

        <!--  Database driven  -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.11</version>
			<scope>runtime</scope>
		</dependency>

And then jdbc The connection of is changed to

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/XXXX?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT%2B8

 

The place marked red is very important , Otherwise, there may be some other problems ！

jdbc Connected ClassName by  "com.mysql.cj.jdbc.Driver"

If you use com.alibaba.druid The library file connecting to the database also needs to be modified to ：

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>

This can effectively prevent Mysql8 Some problems caused by