英文:
Error creating bean with name 'roleRepository' java spring boot
问题
RoleRepository
package com.jawad.api.repository;
import javax.management.relation.Role;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface RoleRepository extends CrudRepository<Role, Integer> {
}
AppsController
package com.jawad.api.controller;
import java.util.List;
import javax.management.relation.Role;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import com.jawad.api.repository.RoleRepository;
@RestController
public class AppsController {
@Autowired
private RoleRepository roleRepository;
@GetMapping("/getAllRoles")
public List<Role> getAllRoles() {
return (List<Role>) roleRepository.findAll();
}
@GetMapping("/hi")
public String hi(){
return "hi";
}
}
PrepaidWebAppApplication
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class PrepaidWebAppApplication {
public static void main(String[] args) {
SpringApplication.run(PrepaidWebAppApplication.class, args);
}
}
当我运行我的应用程序时，我遇到了一个错误，我无法找到解决方法：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'roleRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Not a managed type: class javax.management.relation.Role
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:176) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1827) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
...
(更多错误信息)
Caused by: java.lang.IllegalArgumentException: Not a managed type: class javax.management.relation.Role
at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:582) ~[hibernate-core-5.4.18.Final.jar:5.4.18.Final]
...
(更多错误信息)
当我将PrepaidWebAppApplication.java移动到包含3个模型（user、role和institution）的模型文件夹中时，它可以正常工作，但是我的GET请求不再被识别，我遇到了错误：404 not found。
我该如何解决这个问题？
英文:
RoleRepository
package com.jawad.api.repository;
import javax.management.relation.Role;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface RoleRepository extends CrudRepository<Role,Integer>{
}
AppsController
package com.jawad.api.controller;
import java.util.List;
import javax.management.relation.Role;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import com.jawad.api.repository.RoleRepository;
@RestController
public class AppsController {
@Autowired
private RoleRepository rolerepository;
@GetMapping("/getAllRoles")
public List<Role> getAllRoles() {
return (List<Role>) rolerepository.findAll();
}
@GetMapping("/hi")
public String hi(){
return "hi";
}
}
PrepaidWebAppApplication
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class PrepaidWebAppApplication {
public static void main(String[] args) {
SpringApplication.run(PrepaidWebAppApplication.class, args);
}
}
When I run my application I get an error and I cannot find a way to fix it:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'roleRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Not a managed type: class javax.management.relation.Role
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:176) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1827) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1265) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334) ~[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-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.repository.config.DeferredRepositoryInitializationListener.onApplicationEvent(DeferredRepositoryInitializationListener.java:36) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.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-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at com.jawad.api.PrepaidWebAppApplication.main(PrepaidWebAppApplication.java:12) [classes/:na]
Caused by: java.lang.IllegalArgumentException: Not a managed type: class javax.management.relation.Role
at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:582) ~[hibernate-core-5.4.18.Final.jar:5.4.18.Final]
at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:85) ~[hibernate-core-5.4.18.Final.jar:5.4.18.Final]
at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:75) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:229) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:179) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:162) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:72) ~[spring-data-jpa-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:309) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
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]
at org.springframework.data.util.Lazy.getNullable(Lazy.java:212) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.util.Lazy.get(Lazy.java:94) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:244) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:57) ~[spring-data-commons-2.3.2.RELEASE.jar:2.3.2.RELEASE]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:169) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 24 common frames omitted
When I moved the PrepaidWebAppApplication.java to the model folder containing 3 models (user, role, and institution) it works but then my get requests won't be recognized anymore. I get the error: 404 not found.
How can I solve this?
答案1
得分: 1
你已经从你的RoleRepository和AppsController中导入了javax包中的Role实体。请从你的项目中导入它，它应该可以正常工作。
import 你的项目中的Role实体;
英文:
You have imported the Role entity from javax package in your RoleRepository and AppsController. Import it from your project and it should work for you.
import javax.management.relation.Role;
Change above import to your project Role entity.
答案2
得分: 1
以下是翻译好的部分：
关于 spring-boot-starter-data-jpa 的一些基本概念：
-
stereotype注解如下：<br>
<b>A.<i> @Component</i></b>。<br>
<b>B.<i> @Controller</i></b>。<br>
<b>C.<i> @Service</i></b>。<br>
<b>D.<i> @Repository</i></b>。
在 Spring 中必须是具体类。 -
最新版本的 Spring Boot 已经自动启用了
@EnableJpaRepositories，依赖于spring-boot-starter-data-jpa。 -
@EnableJpaRepository负责注册CrudRepository、JPARepository等接口的实现。在这里，我们不需要添加SpringFramework的stereotype注解。 -
对于接口
CrudRepository和JPARepository，它们都与 JPA 有关，所以它们引用的类必须在具体类上具有 JPA 注解，如@Entity、@Table。
现在回到您的问题陈述
对于 import javax.management.relation.Role：
import javax.management.relation.Role是一个具体类，即不是抽象类 --> 已接受。import javax.management.relation.Role类没有 JPA 注解，因此我们不能直接在CrudRepository、JPARepository中使用 ---> 不接受。RoleRepository不应该有stereotype注解。
解决方案：
- 创建一个类，类似于
import javax.management.relation.Role，并在其上添加 JPA 注解。 - 在
CrudRepository、JPARepository中使用的 JPA 实体必须具有@Id字段，否则将遇到新的异常。
英文:
Some basic concept on spring-boot-starter-data-jpa:
-
stereotypeannotations like: <br>
<b>A.<i> @Component</i></b>. <br>
<b>B.<i> @Controller</i></b> <br>
<b>C.<i> @Service</i></b> <br>
<b>D.<i> @Repository</i></b> <br>
in spring must be concrete class. -
Latest version of Spring boot has
@EnableJpaRepositoriesauto enabled with dependency ofspring-boot-starter-data-jpa. -
@EnableJpaRepositoryis responsible of registration of interface implementation ofCrudRepository,JPARepository, so on. Here we don't need to addstereotypeannotations ofSpringFramework. -
For interface
CrudRepository,JPARepositoryhas its part of JPA So class which it refer must have JPA annotations like@Entity,@Tableon concrete class.
<b>Now coming back to your problem statement</b>
For import javax.management.relation.Role:
import javax.management.relation.Roleis a concrete class, i.e. not abstract class --> <b>Accepted</b>import javax.management.relation.Roleclass doesn't have JPA annotation, So we can't use directly withCrudRepository,JPARepository---> <b>Not Accepted</b>RoleRepositoryshould not havestereotypeannotations.
<b>Solutions:</b>
- Create a class similar to
import javax.management.relation.Rolewith JPA annotation on it. - JPA Entity used in
CrudRepository,JPARepositorymust have@Idfield in it else you will encounter new exceptions.
答案3
得分: -1
请还要交叉检查您的实体类，我错过了下面的Id注释和主键上的生成值注释，这导致了org.springframework.beans.factory.BeanCreationException在Repository上发生。
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
英文:
Please also cross check your entity class, I missed the below Id annotation, and the generated value annotation on primary key, due to which org.springframework.beans.factory.BeanCreationException occurred on the Repository.
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
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