java 未检测到@EnableJpaRepositories或未在spring-boot应用程序中的任何位置检测到仓库的@Autowired

vatpfxk5  于 2023-10-14  发布在  Java
关注(0)|答案(4)|浏览(123)

我提到过很多类似的stackoverflow问题。我已经尝试了所有提供的解决方案和建议。但由于未检测到Repository类的@Autowired而不断给出错误，无论其在 Boot 应用程序文件中的@EnableJpaRepositories中的定义如何。我试过用

  1. @Configuration
  2. @EnableAutoConfiguration
  3. @ComponentScan("com.example.repository") as well in the Boot application class. 
  4. Nothing seems to resolve the error. 
  6. Desperately seeking help from anyone who can find out what am I doing wrong. Please help me out. I have been trying to find on the internet and tried on my own. But still no luck and I have not been patient for the past two days because of this.
  8. I want to resolve this and get ready to get a job using spring-boot-starter-data-jpa in their project. So please help.
  10. ===============================================================================
  12.     enter code here
  14. folder structure
  15. src->main->java->com
  16.   - ApplicationDataSource.java
  17. src->main->java->com->example->controller
  18.   - H2Controller.java
  19. src->main->java->com->example->service
  20.   - H2Service.java
  21. src->main->java->com->example->repository
  22.   - H2Repository.java
  23. -------------------------------------------
  24. <?xml version="1.0" encoding="UTF-8"?>
  25. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  26.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  27.     <modelVersion>4.0.0</modelVersion>
  28.     <parent>
  29.         <groupId>org.springframework.boot</groupId>
  30.         <artifactId>spring-boot-starter-parent</artifactId>
  31.         <version>2.3.2.RELEASE</version>
  32.         <relativePath/> <!-- lookup parent from repository -->
  33.     </parent>
  34.     <groupId>com.example</groupId>
  35.     <artifactId>h2sample</artifactId>
  36.     <version>0.0.1-SNAPSHOT</version>
  37.     <name>h2sample</name>
  38.     <description>Demo project for Spring Boot</description>
  40.     <properties>
  41.         <java.version>1.8</java.version>
  42.     </properties>
  44.     <dependencies>
  45.         <dependency>
  46.         <groupId>org.apache.tomcat</groupId>
  47.         <artifactId>tomcat-jdbc</artifactId>
  48.         <version>9.0.10</version>
  49.         </dependency>
  51.         <dependency>
  52.             <groupId>org.springframework.boot</groupId>
  53.             <artifactId>spring-boot-starter-data-jpa</artifactId>
  54.             <version>2.3.2.RELEASE</version>
  55.         </dependency>
  56.         <dependency>
  57.             <groupId>org.springframework.boot</groupId>
  58.             <artifactId>spring-boot-starter-web</artifactId>
  59.             <version>2.3.2.RELEASE</version>
  60.         </dependency>
  62.         <dependency>
  63.             <groupId>com.h2database</groupId>
  64.             <artifactId>h2</artifactId>
  65.             <scope>runtime</scope>
  66.         </dependency>
  67.         
  68.         <dependency>
  69.             <groupId>com.jolbox</groupId>
  70.             <artifactId>bonecp</artifactId>
  71.             <version>0.8.0.RELEASE</version>
  72.         </dependency>
  73.         
  74.         <dependency>
  75.             <groupId>org.springframework.boot</groupId>
  76.             <artifactId>spring-boot-starter-test</artifactId>
  77.             <scope>test</scope>
  78.             <exclusions>
  79.                 <exclusion>
  80.                     <groupId>org.junit.vintage</groupId>
  81.                     <artifactId>junit-vintage-engine</artifactId>
  82.                 </exclusion>
  83.             </exclusions>
  84.         </dependency>
  85.     </dependencies>
  87.     <build>
  88.         <plugins>
  89.             <plugin>
  90.                 <groupId>org.springframework.boot</groupId>
  91.                 <artifactId>spring-boot-maven-plugin</artifactId>
  92.             </plugin>
  93.         </plugins>
  94.     </build>
  96. </project>
  98. ---------------------------------------------------
  100.     
  102. package com;
  104. import org.springframework.boot.SpringApplication;
  105. import org.springframework.boot.autoconfigure.SpringBootApplication;
  106. import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  107. import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
  108. import org.springframework.boot.autoconfigure.domain.EntityScan;
  109. import org.springframework.context.annotation.ComponentScan;
  110. import org.springframework.context.annotation.Configuration;
  112. import com.example.repository.H2Repository;
  113. import com.example.repository.City;
  115. /*
  116.  * @Configuration
  117.  * 
  118.  * @EnableAutoConfiguration
  119.  * 
  120.  * @ComponentScan("com.example.h2sample")
  121.  */
  123. @SpringBootApplication(scanBasePackages= {"com.example.controller","com.example.service"})
  124. @EnableJpaRepositories("com.example.repository")
  125. public class H2sampleApplication {
  126.     
  127.     public static void main(String[] args) {
  128.         SpringApplication.run(H2sampleApplication.class, args);
  129.     }
  130.     
  131.     
  133. }
  134. --------------------
  138. package com.example.controller;
  140. import org.springframework.http.ResponseEntity;
  141. import org.springframework.http.HttpStatus;
  142. import org.springframework.http.MediaType;
  143. import org.springframework.web.bind.annotation.GetMapping;
  144. import org.springframework.web.bind.annotation.RestController;
  145. import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
  146. import org.springframework.beans.factory.annotation.Autowired;
  148. import com.example.service.H2Service;
  150. @RestController
  151. public class H2Controller {
  152.     
  153.     
  154.     @Autowired
  155.     private H2Service h2service;
  156.         
  157.     @GetMapping(value="/testh2")
  158.     public String testh2() {
  159.         
  160.         return "Hi Test "+h2service.getH2Service();
  161.     }
  163. }
  165. -------------------------------------------
  169. package com.example.service;
  171. import org.springframework.stereotype.Service;
  172. import org.springframework.beans.factory.annotation.Autowired;
  173. import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
  174. import com.example.repository.H2Repository;
  175. import com.example.repository.City;
  179. @Service
  180. public class H2Service {
  181.     
  182.     
  183.     
  184.      @Autowired
  185.      private H2Repository<City> h2repository;
  186.         
  187.     
  188.     public String getH2Service() {
  189.         
  190.         System.out.println(h2repository.findAll());
  191.         return " from Service";
  192.     }
  193. }
  195. --------------------------------------
  196. package com.example.repository;
  198. import org.springframework.data.jpa.repository.JpaRepository;
  199. import org.springframework.data.repository.CrudRepository;
  201. import org.springframework.stereotype.Repository;
  202. import org.springframework.stereotype.Component;
  203. import java.util.List;
  205. public interface H2Repository<City> extends CrudRepository<City, Long> {
  206.     
  207.     public List<City> findAll();
  209. }
  210. -----------------------------------------
  214. package com.example.repository;
  216. import java.util.Objects;
  217. import javax.persistence.Entity;
  218. import javax.persistence.GeneratedValue;
  219. import javax.persistence.GenerationType;
  220. import javax.persistence.Id;
  221. import javax.persistence.Table;
  223. @Entity
  224. @Table(name = "CITY")
  225. public class City {
  227.     @Id
  228.     private Long id;
  230.     private String name;
  231.     private int population;
  233.     public Long getId() {
  235.         return id;
  236.     }
  238.     public void setId(Long id) {
  240.         this.id = id;
  241.     }
  243.     public String getName() {
  244.         return name;
  245.     }
  247.     public void setName(String name) {
  249.         this.name = name;
  250.     }
  252.     public int getPopulation() {
  254.         return population;
  255.     }
  257.     public void setPopulation(int population) {
  259.         this.population = population;
  260.     }
  261.     
  262. }
  264. ===================================================================
  266. server.servlet.context-path=/h2
  267. spring.datasource.driverClassName=org.h2.Driver
  268. spring.datasource.url=jdbc:h2:./test-db
  269. spring.datasource.username=sa
  270. spring.datasource.password=password
  271. spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
  272. spring.jpa.show-sql=true
  275. Error
  276. ----
  278. H2Sample\h2sample\target\classes started by Sethu in H:\H2Sample\h2sample)
  279. 2020-07-28 11:39:01.955  INFO 14236 --- [           main] com.H2sampleApplication                  : No active profile set, falling back to default profiles: default
  280. 2020-07-28 11:39:02.453  INFO 14236 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
  281. 2020-07-28 11:39:02.511  INFO 14236 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 46ms. Found 1 JPA repository interfaces.
  282. 2020-07-28 11:39:03.610  INFO 14236 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
  283. 2020-07-28 11:39:03.624  INFO 14236 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
  284. 2020-07-28 11:39:03.624  INFO 14236 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.37]
  285. 2020-07-28 11:39:03.754  INFO 14236 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/h2]     : Initializing Spring embedded WebApplicationContext
  286. 2020-07-28 11:39:03.755  INFO 14236 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1736 ms
  287. 2020-07-28 11:39:03.922  INFO 14236 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
  288. 2020-07-28 11:39:04.047  INFO 14236 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
  289. 2020-07-28 11:39:05.024  INFO 14236 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
  290. 2020-07-28 11:39:05.072  INFO 14236 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.4.18.Final
  291. 2020-07-28 11:39:05.309  INFO 14236 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
  292. 2020-07-28 11:39:05.414  INFO 14236 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
  293. Hibernate: drop table if exists city CASCADE
  294. Hibernate: create table city (id bigint not null, name varchar(255), population integer not null, primary key (id))
  295. 2020-07-28 11:39:05.970  INFO 14236 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
  296. 2020-07-28 11:39:05.980  INFO 14236 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
  297. 2020-07-28 11:39:06.135  WARN 14236 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'h2Controller': Unsatisfied dependency expressed through field 'h2service'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'h2Service': Unsatisfied dependency expressed through field 'h2repository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'h2Repository' defined in com.example.repository.H2Repository defined in @EnableJpaRepositories declared on H2sampleApplication: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
  298. 2020-07-28 11:39:06.136  INFO 14236 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
  299. 2020-07-28 11:39:06.141  INFO 14236 --- [           main] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down'
  300. Hibernate: drop table if exists city CASCADE
  301. 2020-07-28 11:39:06.150  INFO 14236 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
  302. 2020-07-28 11:39:06.188  INFO 14236 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
  303. 2020-07-28 11:39:06.194  INFO 14236 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
  304. 2020-07-28 11:39:06.223  INFO 14236 --- [           main] ConditionEvaluationReportLoggingListener :
  306. Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
  307. 2020-07-28 11:39:06.255 ERROR 14236 --- [           main] o.s.boot.SpringApplication               : Application run failed
  309. org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'h2Controller': Unsatisfied dependency expressed through field 'h2service'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'h2Service': Unsatisfied dependency expressed through field 'h2repository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'h2Repository' defined in com.example.repository.H2Repository defined in @EnableJpaRepositories declared on H2sampleApplication: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
  310.         at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  311.         at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  312.         at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  313.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1420) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  314.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  315.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  316.         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  317.         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  318.         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  319.         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  320.         at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  321.         at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  322.         at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  323.         at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  324.         at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  325.         at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  326.         at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  327.         at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  328.         at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  329.         at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  330.         at com.H2sampleApplication.main(H2sampleApplication.java:28) [classes/:na]
  331. Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'h2Service': Unsatisfied dependency expressed through field 'h2repository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'h2Repository' defined in com.example.repository.H2Repository defined in @EnableJpaRepositories declared on H2sampleApplication: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
  332.         at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  333.         at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  334.         at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  335.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1420) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  336.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  337.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  338.         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  339.         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  340.         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  341.         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  342.         at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  343.         at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1307) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  344.         at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  345.         at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  346.         ... 20 common frames omitted
  347. Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'h2Repository' defined in com.example.repository.H2Repository defined in @EnableJpaRepositories declared on H2sampleApplication: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
  348.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1794) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  349.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  350.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  351.         at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  352.         at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  353.         at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  354.         at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  355.         at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  356.         at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1307) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  357.         at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  358.         at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  359.         ... 33 common frames omitted
  360. Caused by: java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
  361.         at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:582) ~[hibernate-core-5.4.18.Final.jar:5.4.18.Final]
  362.         at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:85) ~[hibernate-core-5.4.18.Final.jar:5.4.18.Final]
  363.         at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:75) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  364.         at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  365.         at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:229) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  366.         at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:179) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  367.         at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:162) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  368.         at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:72) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  369.         at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:309) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  370.         at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:297) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  371.         at org.springframework.data.util.Lazy.getNullable(Lazy.java:212) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  372.         at org.springframework.data.util.Lazy.get(Lazy.java:94) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  373.         at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:300) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  374.         at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
  375.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  376.         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1790) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
  377.         ... 43 common frames omitted
  379. [INFO] ------------------------------------------------------------------------
  380. [INFO] BUILD FAILURE
  381. [INFO] ------------------------------------------------------------------------
  382. [INFO] Total time:  9.079 s
  383. [INFO] Finished at: 2020-07-28T11:39:06+05:30
  384. [INFO] ------------------------------------------------------------------------
  385. [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.3.2.RELEASE:run (default-cli) on project h2sample: Application finished with exit code: 1 -> [Help 1]
  386. [ERROR]
  387. [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
  388. [ERROR] Re-run Maven using the -X switch to enable full debug logging.
  389. [ERROR]
  390. [ERROR] For more information about the errors and possible solutions, please read the following articles:
  391. [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
  393. --------------------------------------------------------------------------------------
Java

4条答案

按热度按时间
yeotifhr

yeotifhr1#

不需要组件扫描，如果你有你的主类在结构的顶部，也不需要

  1. @Configuration
  2. @EnableAutoConfiguration
  3. @ComponentScan("com.example.repository") as well in the Boot application class.

在你的主类中只需要@SpringBootApplication。
这里不遵循Spring的默认结构
使用@ basePackages = {“com.example”}
试试下面的代码：

  1. @SpringBootApplication   
  2. @EnableAutoConfiguration
  3. @ComponentScan(basePackages={"<base package name>"})
  4. @EnableJpaRepositories(basePackages="<repository package name>")
  5. @EnableTransactionManagement
  6. @EntityScan(basePackages="<entity package name>")
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h7appiyu

h7appiyu2#

在您的服务类别中，替换以下内容

  1. @Autowired
  2.  private H2Repository<City> h2repository;

与

  1. @Autowired
  2.  private H2Repository h2repository;

以及您的存储库界面，请替换以下内容

  1. public interface H2Repository<City> extends CrudRepository<City, Long>

与

  1. public interface H2Repository extends CrudRepository<City, Long>
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guykilcj

guykilcj3#

这也可能是Entity类放置不正确的结果。查看其他实体类所在的文件夹。

赞(0）分享  回复(0）举报  2023-10-14
a64a0gku

a64a0gku4#

我可以通过选择正确的java版本，pom.xml中的依赖关系，application.properties并确保SQL服务器正在运行来解决这个问题。

赞(0）分享  回复(0）举报  2023-10-14
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