版权声明： https://blog.csdn.net/u010448530/article/details/80840828 在用spring cloud的时候，先创建了一个parent项目，然后分别加入eureka-server模块、短信模块，运行正常。最后再加入支付模块（需整合myBatis、mySql）之后，eureka-server模块和短信模块报错：Description: Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class Action: Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
经查，因引入了myBatis的jar包：
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.1
spring boot 会默认加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration这个类，而DataSourceAutoConfiguration类使用了@Configuration注解向spring注入了dataSource bean，又因为项目（eureka-server模块和短信模块）中并没有关于dataSource相关的配置信息，所以当spring创建dataSource bean时因缺少相关的信息就会报错。解决办法：1、在@SpringBootApplication注解上加上exclude，解除自动加载DataSourceAutoConfiguration。@EnableEurekaServer
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }
2、在parent项目的pom.xml文件中保存所有子模块的共有jar依赖，非共有的依赖则在各模块自身的pom.xml文件中进行申明。建议采用此方法，好处在于各模块的依赖不会相互产生干扰。