[英]Implementing Spring Data Repositories Interface throws an Exception "org.springframework.beans.factory.BeanCreationException"
I'm trying to create a repository for a simple web application.我正在尝试为一个简单的 Web 应用程序创建一个存储库。 It seems that importing and using import org.springframework.data.repository.CrudRepository causes an error.
似乎导入和使用 import org.springframework.data.repository.CrudRepository 会导致错误。 I'm not sure how to begin to debug the error message i'm getting.
我不确定如何开始调试我收到的错误消息。
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'roomRepository' defined in main.behavior.RoomRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1794) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:624) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:612) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.data.repository.config.DeferredRepositoryInitializationListener.onApplicationEvent(DeferredRepositoryInitializationListener.java:51) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.config.DeferredRepositoryInitializationListener.onApplicationEvent(DeferredRepositoryInitializationListener.java:36) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:404) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:361) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:898) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:554) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at main.ApplicationKt.main(Application.kt:13) ~[classes/:na]
Caused by: java.lang.NoClassDefFoundError: kotlin/reflect/full/KClasses
at org.springframework.data.mapping.model.PreferredConstructorDiscoverer$Discoverers$2.lambda$discover$3(PreferredConstructorDiscoverer.java:163) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at java.base/java.util.Optional.orElseGet(Optional.java:369) ~[na:na]
at org.springframework.data.mapping.model.PreferredConstructorDiscoverer$Discoverers$2.discover(PreferredConstructorDiscoverer.java:160) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.model.PreferredConstructorDiscoverer.discover(PreferredConstructorDiscoverer.java:79) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.model.BasicPersistentEntity.<init>(BasicPersistentEntity.java:105) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.jpa.mapping.JpaPersistentEntityImpl.<init>(JpaPersistentEntityImpl.java:59) ~[spring-data-jpa-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.createPersistentEntity(JpaMetamodelMappingContext.java:70) ~[spring-data-jpa-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.jpa.mapping.JpaMetamodelMappingContext.createPersistentEntity(JpaMetamodelMappingContext.java:44) ~[spring-data-jpa-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:372) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:263) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:206) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:90) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$4(RepositoryFactoryBeanSupport.java:295) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at java.base/java.util.Optional.ifPresent(Optional.java:183) ~[na:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:295) ~[spring-data-commons-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1790) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 25 common frames omitted
Caused by: java.lang.ClassNotFoundException: kotlin.reflect.full.KClasses
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[na:na]
... 43 common frames omitted
Process finished with exit code 1
Here is my Entity这是我的实体
package main.behavior
import javax.persistence.Column
import javax.persistence.Entity
import javax.persistence.Id
import javax.persistence.Table
@Entity
@Table(name = "rooms")
class Room {
@Id
lateinit var id: String
@Column(name = "user1", nullable = true)
lateinit var user1: String
}
Here is my Repository这是我的存储库
package main.behavior
import org.springframework.data.repository.CrudRepository
interface RoomRepository : CrudRepository<Room, String>
Here is my Controller这是我的控制器
package main.endpoints
import main.behavior.Room
import main.behavior.RoomRepository
import org.springframework.web.bind.annotation.*
@RestController
class CreateRoom(private val repo: RoomRepository){
@RequestMapping("/rooms/create{id}")
@ResponseBody
fun createRoom(@RequestParam(value = "id", required = true) id: String): String {
println("id: $id")
val room = Room().also{
room -> room.id = id
room.user1 = "user1"
}
repo.save(room)
return "room created"
}
}
and my pom.xml和我的 pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
</parent>
<groupId>com.example</groupId>
<artifactId>spring-boot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot</name>
<properties>
<java.version>1.8</java.version>
<kotlin.version>1.4.20-RC</kotlin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
<version>${kotlin.version}</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-test</artifactId>
<version>${kotlin.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.18</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>${kotlin.version}</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<configuration>
<jvmTarget>1.8</jvmTarget>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<id>default-compile</id>
<phase>none</phase>
</execution>
<execution>
<id>default-testCompile</id>
<phase>none</phase>
</execution>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>testCompile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
You are missing a dependency:您缺少依赖项:
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
<version>${kotlin.version}</version>
</dependency>
This dependency helps Spring to create the beans.这种依赖关系帮助 Spring 创建 bean。 For more about this check the documentation: https://kotlinlang.org/docs/reference/reflection.html
有关此检查文档的更多信息: https : //kotlinlang.org/docs/reference/reflection.html
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