Java Spring boot在为JpaRepository创建bean时出错

我在尝试为我的学校项目建立h2数据库时遇到了一个问题。 我想在我为我的数据库创建存储库接口之前，一切都运行得很好

package com.protonmail.jan.backend.repository;

import org.springframework.data.jpa.repository.JpaRepository;

public interface RecordRepository extends JpaRepository {
}

当我在没有存储库代码的情况下运行应用程序时，应用程序至少会启动，我对spring boot还很陌生，所以我不知道这里发生了什么，但我猜我的pom.xml文件中缺少了一些依赖项或需要创建bean的东西？请帮忙，这是我得到的一些错误日志：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'requestMappingHandlerAdapter' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Unsatisfied dependency expressed through method 'requestMappingHandlerAdapter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'recordRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'recordRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'recordRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'recordRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object
Caused by: java.lang.IllegalArgumentException: Not a managed type: class java.lang.Object

这是我的记录

package com.protonmail.jan.backend.entity;

import javax.persistence.*;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@Entity
public class Record extends AbstractEntity {
    @NotNull
    @NotEmpty
    private Date date;

    @NotNull
    @NotEmpty
    private static Map<Integer, Room> rooms;
    static {
        rooms = new HashMap<Integer, Room>(){
            {
                put(1, new Room());
                put(2, new Room());
                put(3, new Room());
            }
        };
    }

    public Collection<Room> getAllRooms(){
        return this.rooms.values();
    }
}

这是抽象实体类

package com.protonmail.jan.backend.entity;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;

@MappedSuperclass
public abstract class AbstractEntity {
    @Id
    @GeneratedValue(strategy= GenerationType.SEQUENCE)
    private Long id;

    public Long getId() {
        return id;
    }

    public boolean isPersisted() {
        return id != null;
    }

    @Override
    public int hashCode() {
        if (getId() != null) {
            return getId().hashCode();
        }
        return super.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        AbstractEntity other = (AbstractEntity) obj;
        if (getId() == null || other.getId() == null) {
            return false;
        }
        return getId().equals(other.getId());
    }
}

我也用过

public interface RecordRepository extends JpaRepository<Repository, Long> {}

public interface RecordRepository扩展了JpaRepository{}

请在接口声明中指定托管对象和id类型：

public interface RecordRepository extends JpaRepository<PersitentClass, ClassId> {
}

public interface RecordRepository扩展了JpaRepository{
}

其中： PersientClass—实体模型的类型 ClassId—“id”字段的类型

---

有关类的详细信息，请参阅。

请在接口声明中指定托管对象和id类型：

public interface RecordRepository extends JpaRepository<PersitentClass, ClassId> {
}

public interface RecordRepository扩展了JpaRepository{
}

其中： PersientClass—实体模型的类型 ClassId—“id”字段的类型

---

有关课程详细信息，请参阅。

@EnableJpaRepositories

配置类上的注释

---

同样如此，

@Repository

@EnableJpaRepositories

配置类上的注释

---

同样，您可以通过将以下内容添加到spring boot开始运行的主类来解决此问题：

@Configuration
@ComponentScan
@EnableAutoConfiguration
@EntityScan("com.mine.alien") // path of the entity model
@EnableJpaRepositories("com.mine.demo.control") // path of jpa repository 

@SpringBootApplication
public class SpringJpah2Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringJpah2Application.class, args);
    }
}

---

您可以通过在spring boot开始运行的主类中添加以下内容来解决此问题：

@Configuration
@ComponentScan
@EnableAutoConfiguration
@EntityScan("com.mine.alien") // path of the entity model
@EnableJpaRepositories("com.mine.demo.control") // path of jpa repository 

@SpringBootApplication
public class SpringJpah2Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringJpah2Application.class, args);
    }
}

---

---

您是否已自动连接RecordRepository？您将收到有关原始类型的警告。注意它们。具体来说，您应该使用

@autowired annotation参数化

JpaRepository

。@autowired annotation在RecordRepository中不起作用，它表示autowired annotation不能应用于类型。您是否有autowired RecordRepository？您将收到有关原始类型的警告。注意它们。具体来说，您应该使用

参数化

JpaRepository

。@autowired annotation在RecordRepository中不起作用，它说autowired annotation不能适用于类型我已经尝试过了，但问题仍然是相同的。您在这之后执行mvn清理验证吗？@DanielJacob我也尝试过，没有结果，同样的问题，最后是类路径上的依赖关系？我已经试过了，但问题仍然是你在那之后做mvn清理验证的相同ID？@DanielJacob我也试过了，没有结果，同样的问题，最后是对你的类路径的依赖？我是否只需在Record类上键入

@EnableJpaRepositories

就可以做到这一点？我不知道你所说的配置类是什么意思。我在Record类和RecordRepository上都添加了此注释，但如果您使用spring boot，则此注释似乎不起作用。将其添加到应用程序Classis上并没有完全解决此问题。但它修复了日志中的一些问题。创建名为“recordRepository”的bean时，会出现以下错误：java.lang.IllegalArgumentException:不是托管类型：interface org.springframework.data.repository.repository我是否只需在Record类上键入

@EnableJpaRepositories

？我不知道你所说的配置类是什么意思。我在Record类和RecordRepository上都添加了此注释，但如果您使用spring boot，则此注释似乎不起作用。将其添加到应用程序Classis上并没有完全解决此问题。但它修复了日志中的一些问题。创建名为“recordRepository”的bean时出现错误，原因是：java.lang.IllegalArgumentException:不是托管类型：interface org.springframework.data.repository.repository