spriing Boot Boot error: Cannot determine embedded database driver class for database type NONE

Recently learning to use Spring boot. Use MAVEN to create a project that references only the spring boot-related jar packages that need to be used, except that there are no configurations.

Write a simple example as follows:

1  PackageCom.torlight;2 3 Importorg.springframework.boot.SpringApplication;4 Importorg.springframework.boot.autoconfigure.EnableAutoConfiguration;5 Importorg.springframework.boot.autoconfigure.SpringBootApplication;6 Importorg.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;7 ImportOrg.springframework.context.ApplicationContext;8 ImportOrg.springframework.context.ConfigurableApplicationContext;9 Ten  One /** A  * @since2017.05.06 -  * @authorAcer -  * the  */ - @SpringBootApplication -  Public classApplication { -      +      Public Static voidMain (string[] args) { -ApplicationContext appctx= springapplication.run (application.class, args); +          ASystem.out.println ("appctx.getbeandefinitioncount=" +Appctx.getbeandefinitioncount ()); at         Try { - ((Configurableapplicationcontext) appctx). Close (); -}Catch(Exception e) {/*Ignore*/ } -     } -}

After running the program, the console outputs an error log:

017-05-06 22:44:18.868 WARN 41648---[Restartedmain] ationconfigembeddedwebapplicationcontext:exception encountered D Uring 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/D Atasourceconfiguration$tomcat.class]: Bean instantiation via factory method failed; Nested exception is org.springframework.beans.BeanInstantiationException:Failed to instantiate [ Org.apache.tomcat.jdbc.pool.DataSource]: Factory method ' DataSource ' threw exception; Nested exception is org.springframework.boot.autoconfigure.jdbc.datasourceproperties$ Datasourcebeancreationexception:cannot Determine embedded database driver class for database type NONE. If you want a embedded database, put a supported one on the classpath. If you have the database settings to is loaded from a particular profiles you may need to active it (no profiles is currently Active).
2017-05-06 22:44:18.871 INFO 41648---[restartedmain] o.apache.catalina.core.standardservice:stopping service Tomcat
2017-05-06 22:44:18.902 INFO 41648---[Restartedmain] utoconfigurationreportlogginginitializer:

Error starting ApplicationContext. To display the Auto-configuration report re-run your application with ' debug ' enabled.
2017-05-06 22:44:18.907 ERROR 41648---[Restartedmain] o.s.b.d.loggingfailureanalysisreporter:

***************************
Application FAILED to START
***************************

Description:

Cannot determine embedded database driver class for database type NONE

Action:

If you want a embedded database, put a supported one on the classpath. If you have the database settings to is loaded from a particular profiles you may need to active it (no profiles is currently Active).

This is because spring Boot defaults to loading the Org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration class, and the Datasourceautoconfiguration class uses the @Configuration annotations into Spring

Injected the DataSource bean. Because there is no configuration information related to datasource in the project, the spring creation DataSource Bean will be error-free due to lack of relevant information.

Because I just use spring boot to write some very simple examples to learn it, add @enableautoconfiguration on the application class (exclude={ Datasourceautoconfiguration.class})

Prevent spring boot from automatically injecting datasource beans

1  PackageCom.torlight;2 3 Importorg.springframework.boot.SpringApplication;4 Importorg.springframework.boot.autoconfigure.EnableAutoConfiguration;5 Importorg.springframework.boot.autoconfigure.SpringBootApplication;6 Importorg.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;7 ImportOrg.springframework.context.ApplicationContext;8 ImportOrg.springframework.context.ConfigurableApplicationContext;9 Ten  One /** A  * @since2017.05.06 -  * @authorAcer -  * the  */ - @SpringBootApplication - @EnableAutoConfiguration (Exclude={datasourceautoconfiguration.class}) -  Public classApplication { +      -      Public Static voidMain (string[] args) { +ApplicationContext appctx= springapplication.run (application.class, args); A          atSystem.out.println ("appctx.getbeandefinitioncount=" +Appctx.getbeandefinitioncount ()); -         Try { - ((Configurableapplicationcontext) appctx). Close (); -}Catch(Exception e) {/*Ignore*/ } -     } -}

spriing Boot Boot error: Cannot determine embedded database driver class for database type NONE