@SpringBootApplication - ComponentScan 在新的 Eclipse 项目中不能按预期工作
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【中文标题】@SpringBootApplication - ComponentScan 在新的 Eclipse 项目中不能按预期工作【英文标题】：@SpringBootApplication - ComponentScan does not work as intended in new Eclipse project 【发布时间】：2018-12-26 08:38:06 【问题描述】：我最近开始使用 Eclipse（从 IntelliJ Idea 转移），但是无论我开始编写什么新的 SpringBoot 应用程序，我总是遇到这个问题。我的主类上的 @SpringBootApplication 没有按预期工作。我应该能够在不添加 @ComponentScann 注释的情况下逃脱（我知道它会使其工作），但这篇文章的目的是找出原始失败的路由原因。我已经知道解决方法。我的应用程序总是中断并显示以下错误消息：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.3.RELEASE)
2018-07-18 13:51:22.026 INFO 13936 --- [ restartedMain] c.g.w.WorkplaceloggerApplication : Starting WorkplaceloggerApplication on G488LTN2E with PID 13936 (C:\Projects\workplacelogger\bin\main started by 212704468 in C:\Projects\workplacelogger)
2018-07-18 13:51:22.026 INFO 13936 --- [ restartedMain] c.g.w.WorkplaceloggerApplication : No active profile set, falling back to default profiles: default
2018-07-18 13:51:22.075 INFO 13936 --- [ restartedMain] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@7f70a763: startup date [Wed Jul 18 13:51:22 CEST 2018]; root of context hierarchy
2018-07-18 13:51:22.959 INFO 13936 --- [ restartedMain] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'httpRequestHandlerAdapter' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration; factoryMethodName=httpRequestHandlerAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration; factoryMethodName=httpRequestHandlerAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]]
2018-07-18 13:51:23.592 INFO 13936 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-07-18 13:51:23.609 INFO 13936 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-07-18 13:51:23.609 INFO 13936 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.31
2018-07-18 13:51:23.609 INFO 13936 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_171\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_171/bin/server;C:/Program Files/Java/jre1.8.0_171/bin;C:/Program Files/Java/jre1.8.0_171/lib/amd64;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\Java\jdk1.8.0_171;C:\Program Files\Git\cmd;C:\ProgramData\chocolatey\bin;C:\Program Files\Java\jdk1.8.0_171\bin;C:\Program Files\nodejs\;C:\Python27\;C:\Python27\Scripts\;C:\ChromeDriver\;;C:\Program Files\Cloud Foundry;C:\Users\212704468\AppData\Local\Microsoft\WindowsApps;C:\Users\212704468\AppData\Roaming\npm;C:\Program Files\Microsoft VS Code\bin;C:\Users\212704468\AppData\Local\Programs\Fiddler;C:\sts-bundle\sts-3.9.4.RELEASE;;.]
2018-07-18 13:51:23.758 INFO 13936 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-07-18 13:51:23.758 INFO 13936 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1683 ms
2018-07-18 13:51:23.892 INFO 13936 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-07-18 13:51:23.908 INFO 13936 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-07-18 13:51:23.909 INFO 13936 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-07-18 13:51:23.909 INFO 13936 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-07-18 13:51:23.909 INFO 13936 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-07-18 13:51:23.942 WARN 13936 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'eventServiceDbImpl': Unsatisfied dependency expressed through field 'eventRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ge.workplacelogger.repositories.EventRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: @org.springframework.beans.factory.annotation.Autowired(required=true)
2018-07-18 13:51:23.942 INFO 13936 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2018-07-18 13:51:23.959 INFO 13936 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-07-18 13:51:24.159 ERROR 13936 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field eventRepository in com.ge.workplacelogger.services.EventServiceDbImpl required a bean of type 'com.ge.workplacelogger.repositories.EventRepository' that could not be found.
Action:
Consider defining a bean of type 'com.ge.workplacelogger.repositories.EventRepository' in your configuration.
所以，这是我正在使用的代码
主类：
package com.ge.workplacelogger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class WorkplaceloggerApplication
public static void main(String[] args)
SpringApplication.run(WorkplaceloggerApplication.class, args);
存储库接口：
package com.ge.workplacelogger.repositories;
import java.util.List;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.ge.workplacelogger.models.Event;
import com.ge.workplacelogger.models.Worker;
@Repository
public interface EventRepository extends CrudRepository<Event, Integer>
void saveEvent(Event event);
void deleteEvent(Event event);
List<Event> findAllEvents();
Event findEventByEventId(Integer eventId);
List<Event> findEventsByWorker(Worker worker);
最后，我想@Autowire EventRepository 的服务：
package com.ge.workplacelogger.services;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ge.workplacelogger.models.Event;
import com.ge.workplacelogger.models.Worker;
import com.ge.workplacelogger.repositories.EventRepository;
@Service
public class EventServiceDbImpl implements EventService
@Autowired
EventRepository eventRepository;
@Override
public void saveEvent(Event event)
eventRepository.saveEvent(event);
@Override
public void deleteEvent(Event event)
eventRepository.deleteEvent(event);
@Override
public List<Event> findAllEvents()
return eventRepository.findAllEvents();
@Override
public Event findEventByEventId(Integer eventId)
return eventRepository.findEventByEventId(eventId);
@Override
public List<Event> findEventsByWorker(Worker worker)
return eventRepository.findEventsByWorker(worker);
据我了解，我的主类（在 com.ge.workplacelogger 包中）上的 @SpringBootApplication 将在所有子包中作为 @ComponentScan 工作。我所有的服务、存储库、模型都在包 com.ge.workplacelogger 的子包中，所以我真的不知道出了什么问题。这可能是一个荒谬的问题，但它与 Eclipse 有什么关系吗？以前从未遇到过 IntelliJ 的任何问题。
非常感谢您提前回答！
编辑： 这是我的实体以及评估。
package com.ge.workplacelogger.models;
import java.time.LocalDateTime;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table
public class Event
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer eventId;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "workerId")
private Worker worker;
private boolean logIn;
private LocalDateTime timestamp;
private String comment;
public Event()
public Event(Integer eventId, Worker worker, boolean logIn, LocalDateTime timestamp, String comment)
this.eventId = eventId;
this.worker = worker;
this.logIn = logIn;
this.timestamp = timestamp;
this.comment = comment;
public Integer getEventId()
return eventId;
public void setEventId(Integer eventId)
this.eventId = eventId;
public Worker getWorker()
return worker;
public void setWorker(Worker worker)
this.worker = worker;
public boolean isLogIn()
return logIn;
public void setLogIn(boolean logIn)
this.logIn = logIn;
public LocalDateTime getTimestamp()
return timestamp;
public void setTimestamp(LocalDateTime timestamp)
this.timestamp = timestamp;
public String getComment()
return comment;
public void setComment(String comment)
this.comment = comment;
@Override
public String toString()
return "Event [eventId=" + eventId + ", worker=" + worker + ", logIn=" + logIn + ", timestamp=" + timestamp
+ ", comment=" + comment + "]";
编辑 2： 构建.gradle：
buildscript
ext
springBootVersion = '2.0.3.RELEASE'
repositories
mavenCentral()
dependencies
classpath("org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion")
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
group = 'com.ge'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
repositories
mavenCentral()
dependencies
compile('org.springframework.boot:spring-boot-starter-data-jpa')
compile('org.springframework.boot:spring-boot-starter-data-rest')
compile('org.springframework.boot:spring-boot-starter-jdbc')
compile('org.springframework.boot:spring-boot-starter-thymeleaf')
compile('org.springframework.boot:spring-boot-starter-web')
runtime('org.springframework.boot:spring-boot-devtools')
runtime('org.postgresql:postgresql')
testCompile('org.springframework.boot:spring-boot-starter-test')
编辑 3： 此处无法插入的超长报告到此结束：） 调试 = 真
Exclusions:
-----------
org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
Unconditional classes:
----------------------
org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration
org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration
org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration
org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration
org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration
2018-07-18 16:49:24.410 DEBUG 7068 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter : Application failed to start due to an exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:686) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1210) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:367) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:110) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:625) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:444) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1256) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1105) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:312) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:131) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1611) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1363) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:580) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1350) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:580) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at com.ge.workplacelogger.WorkplaceloggerApplication.main(WorkplaceloggerApplication.java:14) [main/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_171]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_171]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_171]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_171]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.3.RELEASE.jar:2.0.3.RELEASE]
2018-07-18 16:49:24.411 ERROR 7068 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field eventRepository in com.ge.workplacelogger.services.EventServiceDbImpl required a bean named 'entityManagerFactory' that could not be found.
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
编辑 4： 应用程序.properties
spring.datasource.url=jdbc:postgres://localhost:5432/workplacelogger
spring.datasource.username=postgres
spring.datasource.password=password
spring.jpa.hibernate.ddl-auto=create-drop
spring.logging.level.org.hibernate.SQL=debug
spring.jpa.show-sql=true pring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
debug=true
【问题讨论】：
@SpringBootApplication @ComponentScan("com.ge.workplacelogger") --> 添加这一行 我的帖子的目的是我不应该添加任何东西来使 ComponentScan 功能符合默认情况。它也因 @ComponentScan("com.ge.workplacelogger") 注释而失败，但我可以通过将每个包添加到 componentsscan 来使其工作。 你可以用debug=true 开始它来查看自动配置报告吗？
看起来您正在使用 JPA，我在 Hibernate 初始化的日志中看不到任何迹象。这让我想知道您的应用程序是否缺少或损坏的依赖项。您能否使用应用程序依赖项的详细信息（来自您的 pom.xml 或 build.gradle）以及 Darren Forsythe 建议的情况评估报告更新您的问题？
添加您的application.properties。没有要定义的数据源，可能 postgres 驱动程序不在类路径上（因为这是运行时依赖项），不确定 Eclipse 是如何做到的）。
【参考方案1】：
我在导致问题的应用程序属性中发现了一个错误：
原行：
spring.datasource.url=jdbc:postgres://localhost:5432/workplacelogger
正确的行：
spring.datasource.url=jdbc:postgresql://localhost:5432/workplacelogger
还删除了应用程序属性中的以下行，正如之前的“解析器”所建议的那样：
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
代码现在运行，并进行了一些不属于此票证主题的额外小修正。 这里有证据表明程序员应该不时后退一步来查找错误的路径原因:) 我迷失在细节中，花了很多时间在我的家庭项目中找到这样的“错字”。
感谢大家的宝贵时间！
【讨论】：
干得好。不要忘记接受您的问题的答案。【参考方案2】：@SpringBootApplication 确实包含@ComponentScan。
来自Getting Started - Building an Application with Spring Boot：
@SpringBootApplication 是一个方便的注解，它添加了以下所有内容：
@Configuration 将类标记为应用程序上下文的 bean 定义源。
@EnableAutoConfiguration 告诉 Spring Boot 根据类路径设置、其他 bean 和各种属性设置开始添加 bean。
通常你会为 Spring MVC 应用程序添加 @EnableWebMvc，但是当 Spring Boot 在类路径上看到 spring-webmvc 时会自动添加它。这会将应用程序标记为 Web 应用程序并激活关键行为，例如设置 DispatcherServlet。
@ComponentScan 告诉 Spring 在 hello 包中查找其他组件、配置和服务，使其能够找到控制器。
在此处进一步阅读 SO：Configuration using annotation @SpringBootApplication
在我看来，问题的根源可能是缺少您在报告中提到的 entityManagerFactory bean。向上滚动报告，我们会注意到出现的排除部分：
org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
SpringBootApplication exclude when ComponentScanning other @SpringBootApplications 帮助我完成了剩下的工作。您的应用程序属性有点搞砸了。注意这一行：
spring.jpa.show-sql=true pring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
我认为这可能是您原始文件中的 2 行。无论如何，排除DataSourceAutoConfiguration 可能是错误的。尝试删除：
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
【讨论】：
明天早上我会试一试，然后会回复你！我希望它能解决问题。 :) 感谢您的评论！ 我已经删除了你提到的那一行，错误如下： 无法配置数据源：无法配置嵌入式数据源。原因：无法确定合适的驱动程序类 @Bence 您需要在 postgres 的属性中设置驱动程序以上是关于@SpringBootApplication - ComponentScan 在新的 Eclipse 项目中不能按预期工作的主要内容，如果未能解决你的问题，请参考以下文章
Spring编程：springboot @SpringBootApplication注解