1 package cn.zb.test; 2 3 import org.springframework.boot.SpringApplication; 4 5 import org.springframework.boot.autoconfigure.EnableAutoConfiguration; 6 7 import org.springframework.boot.autoconfigure.SpringBootApplication; 8 9 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; 10 11 @SpringBootApplication 12 13 public class Application { 14 15 public static void main(String[] args) { 16 17 SpringApplication.run(Application.class, args); 18 19 } 20 21 }
点击run启动后报错如下：
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v1.5.10.RELEASE) 2019-06-02 10:13:25.294 INFO 10868 --- [ main] cn.zb.test.Application : Starting Application on C300ZA8PPUJ5JRS with PID 10868 (F:\eclipse\workspace\springboot_parent\springboot_web\target\classes started by ABO in F:\eclipse\workspace\springboot_parent\springboot_web) 2019-06-02 10:13:25.303 INFO 10868 --- [ main] cn.zb.test.Application : No active profile set, falling back to default profiles: default 2019-06-02 10:13:25.361 INFO 10868 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@f08448: startup date [Sun Jun 02 10:13:25 CST 2019]; root of context hierarchy 2019-06-02 10:13:25.914 WARN 10868 --- [ main] o.m.s.mapper.ClassPathMapperScanner : No MyBatis mapper was found in '[cn.zb.test]' package. Please check your configuration. 2019-06-02 10:13:27.616 INFO 10868 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http) 2019-06-02 10:13:27.628 INFO 10868 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat 2019-06-02 10:13:27.629 INFO 10868 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.11 2019-06-02 10:13:27.736 INFO 10868 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2019-06-02 10:13:27.736 INFO 10868 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2378 ms 2019-06-02 10:13:27.900 INFO 10868 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/] 2019-06-02 10:13:27.905 INFO 10868 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 2019-06-02 10:13:27.905 INFO 10868 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2019-06-02 10:13:27.905 INFO 10868 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2019-06-02 10:13:27.905 INFO 10868 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*] 2019-06-02 10:13:28.412 INFO 10868 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@f08448: startup date [Sun Jun 02 10:13:25 CST 2019]; root of context hierarchy 2019-06-02 10:13:28.501 INFO 10868 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/index/{name}]}" onto public java.lang.String cn.zb.test.HelloWorldController.index(java.lang.String) 2019-06-02 10:13:28.506 INFO 10868 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2019-06-02 10:13:28.507 INFO 10868 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2019-06-02 10:13:28.541 INFO 10868 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2019-06-02 10:13:28.541 INFO 10868 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2019-06-02 10:13:28.582 INFO 10868 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2019-06-02 10:13:28.634 WARN 10868 --- [ main] ationConfigEmbeddedWebApplicationContext : 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). 2019-06-02 10:13:28.637 INFO 10868 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat 2019-06-02 10:13:28.648 WARN 10868 --- [ost-startStop-1] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: java.lang.Object.wait(Native Method) java.lang.ref.ReferenceQueue.remove(Unknown Source) com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:40) 2019-06-02 10:13:28.660 INFO 10868 --- [ main] utoConfigurationReportLoggingInitializer : Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled. 2019-06-02 10:13:28.665 ERROR 10868 --- [ 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).
这是因为spring boot默认会加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration类，DataSourceAutoConfiguration类使用了@Configuration注解向spring注入了dataSource bean。因为工程中没有关于dataSource相关的配置信息，当spring创建dataSource bean因缺少相关的信息就会报错。
因为我仅仅只是使用spring boot来写一些很简单的例子来学习它，在Application类上增加@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
阻止spring boot自动注入dataSource bean
package cn.zb.test; 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 Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
这样就可以正常启动啦！
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