由于您尚未向该项目中添加任何数据库，因此data-jpa从pom.xml文件中删除了依赖项，这在创建依赖项冲突。删除后它将正常运行。
解决方法我是SpringBoot的新手。因此，在从spring initializr启动项目后，我试图在intellij上运行它。但是启动时出现错误。
以下是 版本 ：Java：8Spring-boot：2.0.6我尝试更改Spring Boot的版本，但没有帮助。还更改了application.properties中的服务器端口，但这也无济于事。
pom.xml
<?xml version='1.0' encoding='UTF-8'?><project xmlns='http://maven.apache.org/POM/4.0.0' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'xsi:schemaLocation='http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd'><modelVersion>4.0.0</modelVersion><parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --></parent><groupId>ghosh.debarshi</groupId><artifactId>spring5webapp</artifactId><version>0.0.1-SNAPSHOT</version><name>spring5webapp</name><description>Demo project for Spring Boot</description><properties> <java.version>1.8</java.version></properties><dependencies> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope> </dependency></dependencies><build> <plugins><plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId></plugin> </plugins></build>
堆栈跟踪 ：
Description:Failed to configure a DataSource: ’url’ attribute is not specified and no embedded datasource could be configured.Reason: Failed to determine a suitable driver classAction:Consider the following:If you want an embedded database (H2,HSQL or Derby),please put it on the classpath.If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).[WARNING] java.lang.reflect.InvocationTargetException at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke (Method.java:566) at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:497) at java.lang.Thread.run (Thread.java:834)Caused by: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh (ServletWebServerApplicationContext.java:155) at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:542) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh (ServletWebServerApplicationContext.java:140) at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:754) at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:386) at org.springframework.boot.SpringApplication.run (SpringApplication.java:307) at org.springframework.boot.SpringApplication.run (SpringApplication.java:1242) at org.springframework.boot.SpringApplication.run (SpringApplication.java:1230) at ghosh.debarshi.spring5webapp.Spring5webappApplication.main (Spring5webappApplication.java:10) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke (Method.java:566) at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:497) at java.lang.Thread.run (Thread.java:834)Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize (TomcatWebServer.java:126) at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init> (TomcatWebServer.java:86) at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer (TomcatServletWebServerFactory.java:413) at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer (TomcatServletWebServerFactory.java:174) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer (ServletWebServerApplicationContext.java:179) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh (ServletWebServerApplicationContext.java:152) at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:542) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh (ServletWebServerApplicationContext.java:140) at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:754) at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:386) at org.springframework.boot.SpringApplication.run (SpringApplication.java:307) at org.springframework.boot.SpringApplication.run (SpringApplication.java:1242) at org.springframework.boot.SpringApplication.run (SpringApplication.java:1230) at ghosh.debarshi.spring5webapp.Spring5webappApplication.main (Spring5webappApplication.java:10) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke (Method.java:566) at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:497) at java.lang.Thread.run (Thread.java:834)Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’servletEndpointRegistrar’ defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/web/ServletEndpointManagementContextConfiguration$WebMvcServletEndpointManagementContextConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.web.ServletEndpointRegistrar]: Factory method ’servletEndpointRegistrar’ threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’healthEndpoint’ defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.health.HealthEndpoint]: Factory method ’healthEndpoint’ threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration’: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$83c4f158]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’dataSource’ defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method ’dataSource’ threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
