java - @SpringBootApplication - ComponentScan 在新的 Eclipse 项目中没有按预期工作

Question

我最近开始使用 Eclipse(从 IntelliJ Idea 迁移而来)，但无论我开始编写新的 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(我知道它会让它起作用)，但这篇文章的目的是找出最初失败的原因。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(interface):

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);
  }
}

据我所知，我的主类(在包 com.ge.workplacelogger 中)上的 @SpringBootApplication 将在所有子包上作为 @ComponentScan 工作。我所有的服务、存储库、模型都在 com.ge.workplacelogger 包的子包中，所以我真的不知道哪里出了问题。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。

非常感谢您提前的回答!

编辑:这也是我的实体，供评估。

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: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

Answer 1

@SpringBootApplication 确实包含了 @ComponentScan。

来自 Getting Started - Building an Application with Spring Boot :

@SpringBootApplication is a convenience annotation that adds all of the following:

@Configuration tags the class as a source of bean definitions for the application context.

@EnableAutoConfiguration tells Spring Boot to start adding beans based on classpath settings, other beans, and various property settings.

Normally you would add @EnableWebMvc for a Spring MVC app, but Spring Boot adds it automatically when it sees spring-webmvc on the classpath. This flags the application as a web application and activates key behaviors such as setting up a DispatcherServlet.

@ComponentScan tells Spring to look for other components, configurations, and services in the hello package, allowing it to find the controllers.

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“排除项”部分:

org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

SpringBootApplication exclude when ComponentScanning other @SpringBootApplications帮我完成了剩下的路。您的应用程序属性稍微搞砸了。请注意这一行:

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 可能是这里的错误。尝试删除:

spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration