首先讲一下SpringBootApplication注解
源码定义为

@Target(ElementType.TYPE)

@Retention(RetentionPolicy.RUNTIME)

@Documented

@Inherited

@SpringBootConfiguration

@EnableAutoConfiguration

@ComponentScan(excludeFilters = {

		@Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),

		@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })

public @interface SpringBootApplication {

所以这一个注解就相当于配置了EnableAutoConfiguration
如果在自己的项目里 SpringBootApplication 和 EnableAutoConfiguration 都配置了 就会有问题。这个是我最开始的理解
但是试了一下 把SpringBootApplication去掉 然后改成如下的形式 还是不行

// @SpringBootApplication

@EnableTransactionManagement // 开启注解式事务 , DataSourceTransactionManagerAutoConfiguration.class

@EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class })

@EnableAspectJAutoProxy(proxyTargetClass = true, exposeProxy = true)

@Configuration

@ComponentScan(includeFilters={}, excludeFilters = { @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),

		@Filter(type = FilterType.CUSTOM, classes =  AutoConfigurationExcludeFilter.class)})

// @ComponentScan

// @Configuration //这是一个配置类，与@Service、@Component的效果类似。spring会扫描到这个类，@Bean才会生效，将ThreadPoolBean这个返回值类注册到spring上下文环境中

// @EnableConfigurationProperties(MyWebServerConfigurationProperties.class) //通过这个注解, 将MyWebServerConfigurationProperties这个类的配置到上下文环境中,本类中使用的@Autowired注解注入才能生效

public class  XxxApplication extends BaseApplication {

网上查资料 最终的解决办法如下

spring:

  application:

    name: coffee

  autoconfigure.exclude: org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration

 

具体原因还没找到，先记录一下 ，以后在查找原因