java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver

时间：2021-12-17 06:40:51
java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver

    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)

    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

    at java.lang.Class.forName0(Native Method)

    at java.lang.Class.forName(Class.java:264)

    at com.baomidou.mybatisplus.generator.config.DataSourceConfig.getConn(DataSourceConfig.java:196)

    at com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder.handlerDataSource(ConfigBuilder.java:269)

    at com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder.<init>(ConfigBuilder.java:132)

    at com.baomidou.mybatisplus.generator.AutoGenerator.execute(AutoGenerator.java:92)

    at com.qingmu.springboot.common.Generator.MybatisPlusGenerator.main(MybatisPlusGenerator.java:148)

Exception in thread "main" java.lang.NullPointerException

    at com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder.getTablesInfo(ConfigBuilder.java:457)

    at com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder.handlerStrategy(ConfigBuilder.java:281)

    at com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder.<init>(ConfigBuilder.java:142)

    at com.baomidou.mybatisplus.generator.AutoGenerator.execute(AutoGenerator.java:92)

    at com.qingmu.springboot.common.Generator.MybatisPlusGenerator.main(MybatisPlusGenerator.java:148)

com.mysql.jdbc.Driver 是 mysql-connector-java 5中的
JDBC连接Mysql5 com.mysql.jdbc.Driver:

org.quartz.dataSource.qzDS.driver:com.mysql.jdbc.Driver

org.quartz.dataSource.qzDS.URL:jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=UTF-8

com.mysql.cj.jdbc.Driver 是 mysql-connector-java 6中的
JDBC连接Mysql6 com.mysql.cj.jdbc.Driver， 需要指定时区serverTimezone:

#org.quartz.dataSource.qzDS.driver:com.mysql.cj.jdbc.Driver

#org.quartz.dataSource.qzDS.URL:jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false

如果你用的mysql-connector-java 5，配置的是com.mysql.cj.jdbc.Driver的配置就会报java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver这个错误。

如果你用的mysql-connector-java 6，配置的是com.mysql.jdbc.Driver的配置也会出现错误，总之MySQL版本要与其配置对应好。

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