Spring Boot Data JPA 的问题 - 创建名称为 [重复] 的 bean 时出错
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【中文标题】Spring Boot Data JPA 的问题 - 创建名称为 [重复] 的 bean 时出错【英文标题】：Issue with Spring Boot Data JPA -- Error creating bean with name [duplicate] 【发布时间】：2017-07-15 10:54:36 【问题描述】：当我尝试编译我的 Spring Boot 应用程序时，我得到了这个异常。请注意，到目前为止，这是一个非常简单的应用程序，所以我不完全确定自己做错了什么。
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1078) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE]
at org.nuradin.victorious.Sandbox.main(Sandbox.java:12) [classes/:na]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:954) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:882) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:370) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:359) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
... 16 common frames omitted
Caused by: org.hibernate.MappingException: Could not determine type for: java.util.List, at table: match_participant, for columns: [org.hibernate.mapping.Column(masteries)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:431) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:398) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.mapping.Property.isValid(Property.java:225) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:595) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.mapping.RootClass.validate(RootClass.java:265) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:329) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:443) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:879) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
... 22 common frames omitted
Process finished with exit code 1
这是我的 pom.xml 文件：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.nuradin.sandbox</groupId>
<artifactId>Victorious</artifactId>
<version>0.1.0 - Development</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.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-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.tensorflow</groupId>
<artifactId>tensorflow</artifactId>
<version>1.2.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
我的配置很可能是错误的。我到处寻找并尝试了许多不同的配置，但它不起作用。有许多不同的帖子与我的例外相同，但第一个下面的行不同，他们的解决方案对我不起作用。
请帮帮我
编辑：这是 MatchParticipants 的来源：
package org.nuradin.victorious.data.matchcrawler;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import java.util.List;
@Entity
public class MatchParticipant
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int entryId;
private ParticipantStats stats;
private int participantId;
private List<Rune> runes;
private ParticipantTimeline timeline;
private int teamId;
private int spell2Id;
private List<MasteryPoint> masteries;
private String highestAchievedSeasonTier;
private int spell1Id;
private int championId;
public ParticipantStats getStats()
return stats;
public void setStats(ParticipantStats stats)
this.stats = stats;
public int getParticipantId()
return participantId;
public void setParticipantId(int participantId)
this.participantId = participantId;
public List<Rune> getRunes()
return runes;
public void setRunes(List<Rune> runes)
this.runes = runes;
public ParticipantTimeline getTimeline()
return timeline;
public void setTimeline(ParticipantTimeline timeline)
this.timeline = timeline;
public int getTeamId()
return teamId;
public void setTeamId(int teamId)
this.teamId = teamId;
public int getSpell2Id()
return spell2Id;
public void setSpell2Id(int spell2Id)
this.spell2Id = spell2Id;
public List<MasteryPoint> getMasteries()
return masteries;
public void setMasteries(List<MasteryPoint> masteries)
this.masteries = masteries;
public String getHighestAchievedSeasonTier()
return highestAchievedSeasonTier;
public void setHighestAchievedSeasonTier(String highestAchievedSeasonTier)
this.highestAchievedSeasonTier = highestAchievedSeasonTier;
public int getSpell1Id()
return spell1Id;
public void setSpell1Id(int spell1Id)
this.spell1Id = spell1Id;
public int getChampionId()
return championId;
public void setChampionId(int championId)
this.championId = championId;
【问题讨论】：
能否附上match_participant实体来源？ 我已经发布了 MatchParticipant 来源 您是否在 Entity 类中导入 Rune 和 MasteryPoint 类型？ 【参考方案1】：您的所有实体字段都缺少适当的 JPA 注释。例如，您必须声明连接类型：
@OneToMany(mappedBy="match_participant_id")
private List<MasteryPoint> masteries;
每个实际的 db 列字段都应该有 @Column 注释。我建议阅读一些简短的 Hibernate/JPA 教程。例如This one 或任何其他在线可用的。
【讨论】：
谢谢，我现在就试试这个 成功了，谢谢【参考方案2】：您介意为列masteries 共享match_participant 的JPA 实体吗？有了给定的详细信息，我相信您使用 java.util.List 作为字段类型 masteries 而不是 java.util.List<mastery>
详情请见org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for columns: [org.hibernate.mapping.Column(students)]
【讨论】：
我已经发布了 MatchParticipant 来源【参考方案3】：添加以下依赖项怎么样？
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.1.4.Final</version>
</dependency>
和
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.3.Final</version>
</dependency>
【讨论】：
【参考方案4】：您必须在实体之间建立联系。
检查这个： http://www.baeldung.com/hibernate-one-to-many
您可以在实体属性或 set 方法上使用键的注释...
【讨论】：
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