Wenn Sie dies lesen, denke ich, dass Sie den Fehler „Kann die eingebettete Datenbanktreiberklasse für den Datenbanktyp NONE nicht bestimmen“ beim Ausführen der Spring Boot-Anwendung erhalten haben. Das folgende Bild zeigt mein einfaches Spring Boot Starter-Projekt, bei dem ich den Fehler „Kann die eingebettete Datenbanktreiberklasse für den Datenbanktyp NONE nicht bestimmen“ beim Ausführen des JUnit-Testfalls erhalten habe. 
Kann die eingebettete Datenbanktreiberklasse für den Datenbanktyp NONE nicht bestimmen
Dieser Fehler tritt auf, wenn keine DataSource für Ihre Spring Boot-Anwendung konfiguriert ist. Wenn Sie die Spring Boot-Anwendung ausführen, versucht sie, die DataSource zu konfigurieren, und gibt diese Fehlermeldung aus, wenn keine Konfiguration bereitgestellt wird. Im Folgenden sind die Klassen aufgeführt, die ich in meinem Spring Boot Starter-Projekt hatte.
package com.journaldev.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBatchHelloWorldApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBatchHelloWorldApplication.class, args);
}
}
package com.journaldev.spring;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBatchHelloWorldApplicationTests {
@Test
public void contextLoads() {
}
}
Meine application.properties-Datei war leer. Jetzt, wenn ich die JUnit-Klasse ausführe, erhalte ich folgenden Fehler.
11:42:49.460 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.469 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
11:42:49.474 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
11:42:49.486 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
11:42:49.495 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests], using SpringBootContextLoader
11:42:49.498 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]: class path resource [com/journaldev/spring/SpringBatchHelloWorldApplicationTests-context.xml] does not exist
11:42:49.498 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]: class path resource [com/journaldev/spring/SpringBatchHelloWorldApplicationTestsContext.groovy] does not exist
11:42:49.499 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]: no resource found for suffixes {-context.xml, Context.groovy}.
11:42:49.499 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]: SpringBatchHelloWorldApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
11:42:49.532 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.539 [main] DEBUG org.springframework.core.env.StandardEnvironment - Adding [systemProperties] PropertySource with lowest search precedence
11:42:49.540 [main] DEBUG org.springframework.core.env.StandardEnvironment - Adding [systemEnvironment] PropertySource with lowest search precedence
11:42:49.540 [main] DEBUG org.springframework.core.env.StandardEnvironment - Initialized StandardEnvironment with PropertySources [systemProperties,systemEnvironment]
11:42:49.547 [main] DEBUG org.springframework.core.io.support.PathMatchingResourcePatternResolver - Resolved classpath location [com/journaldev/spring/] to resources [URL [file:/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/test-classes/com/journaldev/spring/], URL [file:/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/classes/com/journaldev/spring/]]
11:42:49.548 [main] DEBUG org.springframework.core.io.support.PathMatchingResourcePatternResolver - Looking for matching resources in directory tree [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/test-classes/com/journaldev/spring]
11:42:49.548 [main] DEBUG org.springframework.core.io.support.PathMatchingResourcePatternResolver - Searching directory [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/test-classes/com/journaldev/spring] for files matching pattern [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/test-classes/com/journaldev/spring/*.class]
11:42:49.551 [main] DEBUG org.springframework.core.io.support.PathMatchingResourcePatternResolver - Looking for matching resources in directory tree [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/classes/com/journaldev/spring]
11:42:49.551 [main] DEBUG org.springframework.core.io.support.PathMatchingResourcePatternResolver - Searching directory [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/classes/com/journaldev/spring] for files matching pattern [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/classes/com/journaldev/spring/*.class]
11:42:49.551 [main] DEBUG org.springframework.core.io.support.PathMatchingResourcePatternResolver - Resolved location pattern [classpath*:com/journaldev/spring/*.class] to resources [file [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/test-classes/com/journaldev/spring/SpringBatchHelloWorldApplicationTests.class], file [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/classes/com/journaldev/spring/SpringBatchHelloWorldApplication.class]]
11:42:49.589 [main] DEBUG org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider - Identified candidate component class: file [/Users/pankaj/CODE/hackathon/SpringBatchHelloWorld/target/classes/com/journaldev/spring/SpringBatchHelloWorldApplication.class]
11:42:49.590 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.journaldev.spring.SpringBatchHelloWorldApplication for test class com.journaldev.spring.SpringBatchHelloWorldApplicationTests
11:42:49.592 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]: using defaults.
11:42:49.597 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]
11:42:49.612 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Could not instantiate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener]. Specify custom listener classes or make the default listener classes (and their required dependencies) available. Offending class: [javax/servlet/ServletContext]
11:42:49.612 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@587d1d39, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@58c1670b, org.springframework.test.context.support.DirtiesContextTestExecutionListener@6b57696f, org.springframework.test.context.transaction.TransactionalTestExecutionListener@5bb21b69, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener@6b9651f3, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@38bc8ab5, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@687080dc, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@23d2a7e8, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@7a9273a8, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@26a7b76d, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@4abdb505]
11:42:49.613 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.614 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.623 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.623 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.624 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.624 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.624 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.624 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.627 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@69b0fd6f testClass = SpringBatchHelloWorldApplicationTests, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@757942a1 testClass = SpringBatchHelloWorldApplicationTests, locations = '{}', classes = '{class com.journaldev.spring.SpringBatchHelloWorldApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.SpringBootTestContextCustomizer@6ea12c19, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@174d20a, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@4f933fd1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]]], class annotated with @DirtiesContext [false] with mode [null].
11:42:49.627 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.627 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.journaldev.spring.SpringBatchHelloWorldApplicationTests]
11:42:49.628 [main] DEBUG org.springframework.test.context.support.DependencyInjectionTestExecutionListener - Performing dependency injection for test context [[DefaultTestContext@69b0fd6f testClass = SpringBatchHelloWorldApplicationTests, testInstance = com.journaldev.spring.SpringBatchHelloWorldApplicationTests@b7dd107, testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@757942a1 testClass = SpringBatchHelloWorldApplicationTests, locations = '{}', classes = '{class com.journaldev.spring.SpringBatchHelloWorldApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.SpringBootTestContextCustomizer@6ea12c19, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@174d20a, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@4f933fd1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]]]].
11:42:49.676 [main] DEBUG org.springframework.core.env.StandardEnvironment - Adding [systemProperties] PropertySource with lowest search precedence
11:42:49.676 [main] DEBUG org.springframework.core.env.StandardEnvironment - Adding [systemEnvironment] PropertySource with lowest search precedence
11:42:49.676 [main] DEBUG org.springframework.core.env.StandardEnvironment - Initialized StandardEnvironment with PropertySources [systemProperties,systemEnvironment]
11:42:49.677 [main] DEBUG org.springframework.core.env.MutablePropertySources - Adding [inline] PropertySource with highest search precedence
11:42:49.681 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=-1}
11:42:49.681 [main] DEBUG org.springframework.core.env.StandardEnvironment - Adding [Inlined Test Properties] PropertySource with highest search precedence
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.1.RELEASE)
2017-03-04 11:42:49.876 INFO 51131 --- [ main] .s.SpringBatchHelloWorldApplicationTests : Starting SpringBatchHelloWorldApplicationTests on pankaj.local with PID 51131 (started by pankaj in /Users/pankaj/CODE/hackathon/SpringBatchHelloWorld)
2017-03-04 11:42:49.877 INFO 51131 --- [ main] .s.SpringBatchHelloWorldApplicationTests : No active profile set, falling back to default profiles: default
2017-03-04 11:42:49.902 INFO 51131 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@59474f18: startup date [Sat Mar 04 11:42:49 IST 2017]; root of context hierarchy
2017-03-04 11:42:50.311 WARN 51131 --- [ 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/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want 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).
2017-03-04 11:42:50.318 INFO 51131 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-03-04 11:42:50.322 ERROR 51131 --- [ 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).
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.1.RELEASE)
2017-03-04 11:42:50.347 INFO 51131 --- [ main] .s.SpringBatchHelloWorldApplicationTests : Starting SpringBatchHelloWorldApplicationTests on pankaj.local with PID 51131 (started by pankaj in /Users/pankaj/CODE/hackathon/SpringBatchHelloWorld)
2017-03-04 11:42:50.348 INFO 51131 --- [ main] .s.SpringBatchHelloWorldApplicationTests : No active profile set, falling back to default profiles: default
2017-03-04 11:42:50.349 INFO 51131 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@2a448449: startup date [Sat Mar 04 11:42:50 IST 2017]; root of context hierarchy
2017-03-04 11:42:50.475 WARN 51131 --- [ 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/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want 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).
2017-03-04 11:42:50.477 INFO 51131 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-03-04 11:42:50.479 ERROR 51131 --- [ 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).
2017-03-04 11:42:50.486 ERROR 51131 --- [ main] o.s.test.context.TestContextManager : Caught exception while allowing TestExecutionListener [org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@58c1670b] to prepare test instance [com.journaldev.spring.SpringBatchHelloWorldApplicationTests@b7dd107]
java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) ~[spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) ~[spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:47) ~[spring-boot-test-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230) ~[spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) [spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) [.cp/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$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 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).
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) ~[spring-boot-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:120) ~[spring-boot-test-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) ~[spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ~[spring-test-4.3.6.RELEASE.jar:4.3.6.RELEASE]
... 24 common frames omitted
Caused by: 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 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).
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
... 41 common frames omitted
Caused by: org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.determineDriverClassName(DataSourceProperties.java:246) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.initializeDataSourceBuilder(DataSourceProperties.java:183) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration.createDataSource(DataSourceConfiguration.java:42) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Tomcat.dataSource(DataSourceConfiguration.java:56) ~[spring-boot-autoconfigure-1.5.1.RELEASE.jar:1.5.1.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.6.RELEASE.jar:4.3.6.RELEASE]
... 42 common frames omitted
Fix für die Fehlermeldung „Cannot determine embedded database driver class for database type NONE“
Wie Sie sehen können, enthalten meine Java-Klassen nichts, daher hat der Fehler etwas mit Spring Boot zu tun. Ich habe zwei Möglichkeiten gefunden, dieses Problem zu beheben.
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Schließen Sie die automatische Konfiguration der DataSource in der Spring Boot-Anwendungsklasse aus. Dies können wir mit der
EnableAutoConfiguration-Annotation tun, wie im folgenden Code gezeigt.package com.journaldev.spring; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; @SpringBootApplication @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}) public class SpringBatchHelloWorldApplication { public static void main(String[] args) { SpringApplication.run(SpringBatchHelloWorldApplication.class, args); } }Mit dieser Konfiguration wurde der JUnit-Testfall erfolgreich ausgeführt und es gab keinen Cannot determine embedded database driver class for database type NONE-Fehler mehr.
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Ein weiterer Weg, dieses Problem zu beheben, besteht darin,
spring.datasource.urlin der Dateiapplication.propertiesanzugeben. Es hat bei mir funktioniert, obwohl ich keinen Datenbank-Benutzernamen und kein Passwort angegeben habe.spring.datasource.url=jdbc:mysql://localhost/Test_DB
Das ist alles, um den Fehler der Spring Boot-Datenquelle zu beheben. Ich hoffe, diese Lösungen helfen Ihnen, das Problem mit Ihrer Spring Boot-Anwendung zu beheben.