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