springboot shardingjdbc与druid数据源冲突问题及解决
作者：涂山小楼
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~
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。