首先看错误信息

cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/alibaba/druid/spring/boot/autoconfigure/DruidDataSourceAutoConfigure.class]: Invocation of init method failed; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class

如上所示，DruidDataSourceAutoConfigure Failed to determine a suitable driver class，即druid找不到mysql driver,然而mysql的驱动包啥的都没问题，于是直接点进DruidDataSourceAutoConfigure查看源码

如上，标红表明druid是根据spring.datasource.druid找jdbc属性的，如果not found,则根据spring.datasource找jdbc属性，一般而言这是不会出现错误的。但是我这里使用了shardingjdbc，配置如下：

spring:
  shardingsphere:
    datasource:
      names: ds0,ds1
      ds0:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://xxx:3306/ds0
        username: xxx
        password: xxx
      ds1:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://xxx:3306/ds1
        username: xxx
        password: xxx
    sharding:
      tables:
        user:
          actual-data-nodes: ds${0..1}.user${0..1}
          database-strategy:
            inline:
              sharding-column: id
              algorithm-expression: ds${id % 2}
          table-strategy:
            inline:
              sharding-column: id
              algorithm-expression: user$->{id % 2}
          key-generator:
            type: SNOWFLAKE
            column: order_id
    props:
      sql:
        show: true
      executor:
        size: 12

就很显然了，他根据spring.datasource.druid或者spring.datasource确实找不到，因为我的结构是spring.shardingsphere.datasource。

解决方式1：

如果我们用的jar包是druid-spring-boot-starter，则在启动类上排除druid自动配置

@SpringBootApplication(exclude = {DruidDataSourceAutoConfigure.class})

解决方式2：

不用

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.22</version>
</dependency>

改为

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.22</version>
</dependency>

即可