【发布时间】：2020-05-14 15:34:00
【问题描述】：
我使用 spring boot、hibernate、Postgres。我在使用 spring boot 项目时遇到了麻烦。但我无法弄清楚问题是什么以及什么时候会出现。无法注入我的存储库。有谁知道我做错了什么？在这种情况下，可能不会注入存储库。 我正在使用 spring-boot 2.2.2.RELEASE
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-01-29 11:25:07.089 ERROR 9428 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'blocktestServiceImpl': Unsatisfied dependency expressed through field 'blocktestDao'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'blocktestDao': Invocation of init method failed; nested exception is java.lang.IncompatibleClassChangeError
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1422)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$186/1303239496.getObject(Unknown Source)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at uz.owl.lmsapp.LmsApp.main(LmsApp.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'blocktestDao': Invocation of init method failed; nested exception is java.lang.IncompatibleClassChangeError
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$186/1303239496.getObject(Unknown Source)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
... 25 common frames omitted
Caused by: java.lang.IncompatibleClassChangeError: null
at org.springframework.data.jpa.util.JpaMetamodel.lambda$isSingleIdAttribute$4(JpaMetamodel.java:94)
at org.springframework.data.jpa.util.JpaMetamodel$$Lambda$707/451217154.test(Unknown Source)
at java.util.Optional.filter(Optional.java:178)
at org.springframework.data.jpa.util.JpaMetamodel.isSingleIdAttribute(JpaMetamodel.java:94)
at org.springframework.data.jpa.mapping.JpaPersistentPropertyImpl.lambda$new$2(JpaPersistentPropertyImpl.java:110)
at org.springframework.data.jpa.mapping.JpaPersistentPropertyImpl$$Lambda$697/663202040.get(Unknown Source)
at org.springframework.data.util.Lazy.getNullable(Lazy.java:212)
at org.springframework.data.util.Lazy.get(Lazy.java:94)
at org.springframework.data.jpa.mapping.JpaPersistentPropertyImpl.isIdProperty(JpaPersistentPropertyImpl.java:141)
at org.springframework.data.jpa.mapping.JpaPersistentEntityImpl.returnPropertyIfBetterIdPropertyCandidateOrNull(JpaPersistentEntityImpl.java:72)
at org.springframework.data.jpa.mapping.JpaPersistentEntityImpl.returnPropertyIfBetterIdPropertyCandidateOrNull(JpaPersistentEntityImpl.java:39)
at org.springframework.data.mapping.model.BasicPersistentEntity.addPersistentProperty(BasicPersistentEntity.java:218)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:538)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:506)
at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:705)
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:374)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator$$Lambda$703/1886151113.accept(Unknown Source)
at java.util.Collections$SingletonSet.forEach(Collections.java:4826)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:548)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:506)
at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:705)
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:374)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator$$Lambda$703/1886151113.accept(Unknown Source)
at java.util.Collections$SingletonSet.forEach(Collections.java:4826)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.createAndRegisterProperty(AbstractMappingContext.java:548)
at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:506)
at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:705)
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:374)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:248)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:191)
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:85)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$4(RepositoryFactoryBeanSupport.java:295)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport$$Lambda$644/260816667.accept(Unknown Source)
at java.util.Optional.ifPresent(Optional.java:159)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:295)
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:121)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
... 36 common frames omitted
@Repository
public interface BlocktestDao extends JpaRepository<Blocktest, Long> {
}
@Entity
@Getter
@Setter
@Table(name = "blocktest")
public class Blocktest {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String title;
@OneToMany(mappedBy = "blocktest")
private List<BlocktestSubject> blocktestSubjects = new ArrayList<>();
@OneToMany(mappedBy = "blocktest")
private List<BlocktestGroup> blocktestGroups = new ArrayList<>();
@Override
public String toString() {
return "Blocktest{" +
"id=" + id +
", title='" + title + '\'' +
'}';
}
}
@Service
public class BlocktestServiceImpl implements BlocktestService {
@Autowired private StudentSubjectLevelService priorityService;
@Autowired private BlocktestDao blocktestDao;
@Autowired private StudentGroupDao studentGroupDao;
/**
* Please provide valid student list
* @param students
* @param title
* @return
*/
@Override
@Transactional
public BlocktestDto createBlocktest(List<Student> students, String title) {
return null;
}
}
这是我的pom
<?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 https://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>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>uz.owl</groupId>
<artifactId>LmsApp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</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-data-mongodb-reactive</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>2.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>3.2.0</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.6.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.6.1</version>
<scope>compile</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-envers -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-envers</artifactId>
</dependency>
<!--TODO ===================== SECURITY ===========================-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt-impl</artifactId>
<version>0.10.5</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt-jackson</artifactId>
<version>0.10.5</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt-api</artifactId>
<version>0.10.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<!--TODO===================<WEB>================-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--TODO=================<DEV TOOL>=================-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!--TODO===========<SPRING DATA POSTGRES>=============-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<!--TODO================<TEST DEP>=====================-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<!--TODO==============< LOGGING >===================-->
<!-- https://mvnrepository.com/artifact/ch.qos.logback.contrib/logback-mongodb-core -->
<dependency>
<groupId>ch.qos.logback.contrib</groupId>
<artifactId>logback-mongodb-core</artifactId>
<version>0.1.5</version>
</dependency>
<!--TODO===================< POI >=====================-->
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/ooxml-schemas -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>ooxml-schemas</artifactId>
<version>1.4</version>
<exclusions>
<exclusion>
<artifactId>org.apache.xmlbeans</artifactId>
<groupId>xmlbeans</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.1.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<id>jboss repo</id>
<name>jboss repo</name>
<url>https://jcenter.bintray.com/</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
更新： 现在我又发现了一件事。如果我删除这个关系
@OneToMany(mappedBy = "blocktest")
private List<BlocktestSubject> blocktestSubjects = new ArrayList<>();
@OneToMany(mappedBy = "blocktest")
private List<BlocktestGroup> blocktestGroups = new ArrayList<>();
项目可以正常启动
这是我的其他实体：
@Getter
@Setter
@Table(name = Tables.BLOCKTEST_SUBJECT)
public class BlocktestSubject {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "subject_id", nullable = false, insertable = false, updatable = false)
private Long subjectId;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "subject_id")
private Subject subject;
@Column(name = "blocktest_id", nullable = false, insertable = false, updatable = false)
private Long blocktestId;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "blocktest_id")
private Blocktest blocktest;
@OneToMany(mappedBy = "blocktestSubject", fetch = FetchType.EAGER)
private List<BSPCount> bspCounts;
@OneToMany(mappedBy = "blocktestSubject")
private final List<Rule> rules = new ArrayList<>();
}
@Entity
@Getter
@Setter
public class BlocktestGroup {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "blocktest_id", nullable = false, insertable = false, updatable = false)
private Long blocktestId;
@ManyToOne
@JoinColumn(name = "blocktest_id")
private Blocktest blocktest;
@Column(name = "file_id", insertable = false, updatable = false, nullable = false)
private Long fileId;
@OneToOne
@JoinColumn(name = "file_id")
private TFile tFile;
}
【问题讨论】：
-
这个答案很好地解释了这一点。 stackoverflow.com/a/4690885/5423183
-
而未能实例化的类甚至不是问题的一部分。对于初学者来说，修复你的依赖。他们有点乱。使用
spring-boot-starter-data-redis（或者如果需要，可以使用响应式）代替单个redis 的东西。junit依赖项已包含在spring-boot-starter-test中。有反应性的东西和非反应性的东西（比如 jpa 和 web）似乎也有点奇怪。 -
如果我删除blocktest实体项目中的关系可以启动
-
我也面临存储库的相同错误。我的春季父版本是 2.0.4.RELEASE ，我将其更新为 2.3.0.RELEASE 并开始面临这个错误。但奇怪的是有时项目运行良好，有时它会给我这个错误。有什么解决办法吗？
-
java 8 与我的 spring boot 版本不兼容，如果我用户 java 13 都认为可以工作，那么我会使用另一个版本的 spring boot
标签： java spring spring-boot repository