解决spring-boot启动中碰到的问题:Cannot determine embedded database driver class for database type NONE(转)
问题 如下:
2017-07-16 08:50:57.436 INFO 13524 --- [ main] c.p.p.web.PointshopWebApplication : Starting PointshopWebApplication on MSI with PID 13524 (D:\javaProject\com.ppdai.pointshop\pointshop-web\target\classes started by yangliweng in D:\javaProject\com.ppdai.pointshop)
2017-07-16 08:50:57.436 INFO 13524 --- [ main] c.p.p.web.PointshopWebApplication : No active profile set, falling back to default profiles: default
2017-07-16 08:50:57.478 INFO 13524 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@179bb86: startup date [Sun Jul 16 08:50:57 GMT+08:00 2017]; root of context hierarchy
2017-07-16 08:50:57.798 WARN 13524 --- [ main] o.m.s.mapper.ClassPathMapperScanner : No MyBatis mapper was found in '[com.ppdai.pointshop.web.controller, com.ppdai.pointshop.web]' package. Please check your configuration.
2017-07-16 08:50:57.829 INFO 13524 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2017-07-16 08:50:58.001 WARN 13524 --- [ main] o.h.v.m.ParameterMessageInterpolator : HV000184: ParameterMessageInterpolator has been chosen, EL interpolation will not be supported
2017-07-16 08:50:58.151 WARN 13524 --- [ main] o.h.v.m.ParameterMessageInterpolator : HV000184: ParameterMessageInterpolator has been chosen, EL interpolation will not be supported
2017-07-16 08:50:58.224 WARN 13524 --- [ main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfigurationTomcat.class]:Beaninstantiationviafactorymethodfailed;nestedexceptionisorg.springframework.beans.BeanInstantiationException:Failedtoinstantiate[org.apache.tomcat.jdbc.pool.DataSource]:Factorymethod′dataSource′threwexception;nestedexceptionisorg.springframework.boot.autoconfigure.jdbc.DataSourceProperties" role="presentation">Tomcat.class]:Beaninstantiationviafactorymethodfailed;nestedexceptionisorg.springframework.beans.BeanInstantiationException:Failedtoinstantiate[org.apache.tomcat.jdbc.pool.DataSource]:Factorymethod′dataSource′threwexception;nestedexceptionisorg.springframework.boot.autoconfigure.jdbc.DataSourcePropertiesTomcat.class]:Beaninstantiationviafactorymethodfailed;nestedexceptionisorg.springframework.beans.BeanInstantiationException:Failedtoinstantiate[org.apache.tomcat.jdbc.pool.DataSource]:Factorymethod′dataSource′threwexception;nestedexceptionisorg.springframework.boot.autoconfigure.jdbc.DataSourcePropertiesDataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
2017-07-16 08:50:58.240 INFO 13524 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-07-16 08:50:58.240 ERROR 13524 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Cannot determine embedded database driver class for database type NONE
Action:
If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
Process finished with exit code 1
------------------------我是分割线------------------
网上 找到了所谓的解决 方法:
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@SpringBootApplication (exclude = { DataSourceAutoConfiguration. class , HibernateJpaAutoConfiguration. class },scanBasePackages = { "com.ppdai.pointshop.web.controller" } ) public class PointshopWebApplication { public static void main(String[] args) { SpringApplication.run(PointshopWebApplication. class , args); } } |
但是很 遗憾 ,没用。
于是 用maven下载 好springboot 的源码,然后断点调试 进去 ,看看 是什么情况,最后 发现了问题的所在:
因为我这是一个新 项目 ,还 没有 配置数据源 ,但是我又想在 没配置数据源的情况 下去 启动项目,该怎么办呢 ?网上找到的方法是无效的,于是我做了一个大胆的猜测:肯定是某个地方加载了这个bean,因为 这是 一个新项目,所以 我觉得 启动加载的可能性很大,而启动 加载 只有 POM文件 里面的依赖才 有可能办到。下面 是 我的dependency依赖:
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<dependencies> <!-- https: //mvnrepository.com/artifact/org.springframework.boot/spring-boot-autoconfigure --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-autoconfigure</artifactId> <version> 1.5 . 4 .RELEASE</version> </dependency> <!-- https: //mvnrepository.com/artifact/org.springframework.boot/spring-boot --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot</artifactId> <version> 1.5 . 4 .RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> <version> 1.5 . 4 .RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> <version> 1.5 . 4 .RELEASE</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version> 1.3 . 0 </version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version> 1.5 . 4 .RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <version> 1.5 . 4 .RELEASE</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <version> 1.5 . 4 .RELEASE</version> <scope>test</scope> </dependency> <!-- https: //mvnrepository.com/artifact/org.springframework/spring-core --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version> 4.3 . 9 .RELEASE</version> </dependency> <!-- https: //mvnrepository.com/artifact/org.springframework/spring-context --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version> 4.3 . 9 .RELEASE</version> </dependency> </dependencies> |
一个个排查,最后查到org.mybatis.spring.boot这个依赖 ,注释掉即可,可以发现,调试的时候 beannames明显少了很多。
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<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version> 1.3 . 0 </version> </dependency> |
最终,Spring Boot 启动成功!
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