我开始进行春季启动，并且在注释ManyToMany和类关联方面遇到了一些问题
在带注释的对象中建立一对多关系时遇到问题。
我是第一次使用Hibernate，但很难使其与我的模式一起使用。 我有以下几点： 我的图表的图片： [1]：https://zupimages.net/up/19/19/9flp.png“图表”
the error is :
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.4.RELEASE)
2019-05-09 13:17:56.020 INFO 10668 --- [ restartedMain] c.p.pfa.projetpfa.ProjetpfaApplication : Starting ProjetpfaApplication on DESKTOP-QO4NQ82 with PID 10668 (C:\Users\mr-el\Desktop\BOOTSPRING\projetpfa\target\classes started by mr-el in C:\Users\mr-el\Desktop\BOOTSPRING\projetpfa)
2019-05-09 13:17:56.025 INFO 10668 --- [ restartedMain] c.p.pfa.projetpfa.ProjetpfaApplication : No active profile set, falling back to default profiles: default
2019-05-09 13:17:56.407 INFO 10668 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2019-05-09 13:17:56.408 INFO 10668 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2019-05-09 13:17:57.615 INFO 10668 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-05-09 13:17:57.691 INFO 10668 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 65ms. Found 1 repository interfaces.
2019-05-09 13:17:58.284 INFO 10668 --- [ restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$b0ecf46f] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-05-09 13:17:58.713 INFO 10668 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8443 (http)
2019-05-09 13:17:58.764 INFO 10668 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-05-09 13:17:58.764 INFO 10668 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.17]
2019-05-09 13:17:58.922 INFO 10668 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-05-09 13:17:58.922 INFO 10668 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2514 ms
2019-05-09 13:17:59.490 INFO 10668 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2019-05-09 13:17:59.596 INFO 10668 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2019-05-09 13:17:59.651 INFO 10668 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2019-05-09 13:17:59.713 INFO 10668 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate Core {5.3.9.Final}
2019-05-09 13:17:59.721 INFO 10668 --- [ restartedMain] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2019-05-09 13:17:59.851 INFO 10668 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
2019-05-09 13:18:00.610 INFO 10668 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2019-05-09 13:18:01.053 WARN 10668 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: com.projet.pfa.projetpfa.models.Competence, at table: formateur, for columns: [org.hibernate.mapping.Column(competences)]
2019-05-09 13:18:01.055 INFO 10668 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2019-05-09 13:18:01.062 INFO 10668 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2019-05-09 13:18:01.066 INFO 10668 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2019-05-09 13:18:01.087 INFO 10668 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-05-09 13:18:01.096 ERROR 10668 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: com.projet.pfa.projetpfa.models.Competence, at table: formateur, for columns: [org.hibernate.mapping.Column(competences)]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]
at com.projet.pfa.projetpfa.ProjetpfaApplication.main(ProjetpfaApplication.java:10) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_201]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_201]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_201]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_201]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.4.RELEASE.jar:2.1.4.RELEASE]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: com.projet.pfa.projetpfa.models.Competence, at table: formateur, for columns: [org.hibernate.mapping.Column(competences)]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:402) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:377) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1837) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
... 21 common frames omitted
Caused by: org.hibernate.MappingException: Could not determine type for: com.projet.pfa.projetpfa.models.Competence, at table: formateur, for columns: [org.hibernate.mapping.Column(competences)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:486) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:453) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.mapping.Property.isValid(Property.java:226) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:624) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.mapping.RootClass.validate(RootClass.java:267) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:347) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:466) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) ~[hibernate-core-5.3.9.Final.jar:5.3.9.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:57) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:390) ~[spring-orm-5.1.6.RELEASE.jar:5.1.6.RELEASE]
... 25 common frames omitted
Fromateur类：
package com.projet.pfa.projetpfa.models;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.JoinColumn;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
@Entity
@Table(name="Formateur")
public class Formateur {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long idForamteur;
private String NomFormateur;
private String PrenomFormateur;
private String EmailFormateur;
private String TeleFormateur;
private String TypeFormateur;
private String LoginFormateur;
private String PasswordFormateur;
private Competence competences;
@ManyToMany(cascade = { CascadeType.ALL })
@JoinTable(
name = "assos1",
joinColumns = { @JoinColumn(name = "idForamteur") },
inverseJoinColumns = { @JoinColumn(name = "IdCompetence") }
)
Set<Competence> projects = new HashSet<>();
public Formateur() {
}
public String getNomFormateur() {
return NomFormateur;
}
public void setNomFormateur(String nomFormateur) {
NomFormateur = nomFormateur;
}
public String getPrenomFormateur() {
return PrenomFormateur;
}
public void setPrenomFormateur(String prenomFormateur) {
PrenomFormateur = prenomFormateur;
}
public String getEmailFormateur() {
return EmailFormateur;
}
public void setEmailFormateur(String emailFormateur) {
EmailFormateur = emailFormateur;
}
public String getTeleFormateur() {
return TeleFormateur;
}
public void setTeleFormateur(String teleFormateur) {
TeleFormateur = teleFormateur;
}
public String getTypeFormateur() {
return TypeFormateur;
}
public void setTypeFormateur(String typeFormateur) {
TypeFormateur = typeFormateur;
}
public String getLoginFormateur() {
return LoginFormateur;
}
public void setLoginFormateur(String loginFormateur) {
LoginFormateur = loginFormateur;
}
public String getPasswordFormateur() {
return PasswordFormateur;
}
public void setPasswordFormateur(String passwordFormateur) {
PasswordFormateur = passwordFormateur;
}
public Long getidForamteur() {
return idForamteur;
}
public Competence getCompetences() {
return competences;
}
public void setCompetences(Competence competences) {
this.competences = competences;
}
}
Assos1类：
package com.projet.pfa.projetpfa.models;
import java.util.Date;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Entity;
@Entity
@Table(name="Assos1")
public class Assos1 {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
private Date DateAppretisage ;
public Assos1 ()
{
}
public Date getDateAppretisage() {
return DateAppretisage;
}
public void setDateAppretisage(Date dateAppretisage) {
DateAppretisage = dateAppretisage;
}
public Long getId() {
return id;
}
}
课堂能力：
package com.projet.pfa.projetpfa.models;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
@Entity
@Table(name="Competence")
public class Competence {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int IdCompetence;
private String NomCompetence;
private String DesicrptionComptence;
private String Diplome;
private Date DateDplome ;
@ManyToMany(mappedBy = "competences" , fetch = FetchType.LAZY)
private Set<Formateur> employees = new HashSet<>();
public Competence() {
}
public String getNomCompetence() {
return NomCompetence;
}
public void setNomCompetence(String nomCompetence) {
NomCompetence = nomCompetence;
}
public String getDesicrptionComptence() {
return DesicrptionComptence;
}
public void setDesicrptionComptence(String desicrptionComptence) {
DesicrptionComptence = desicrptionComptence;
}
public String getDiplome() {
return Diplome;
}
public void setDiplome(String diplome) {
Diplome = diplome;
}
public Date getDateDplome() {
return DateDplome;
}
public void setDateDplome(Date dateDplome) {
DateDplome = dateDplome;
}
public int getIdCompetence() {
return IdCompetence;
}
}
应用程序属性：
spring.datasource.url=jdbc:mysql://localhost:3306/crudapi
spring.datasource.username=root
spring.datasource.password=
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.properties..hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
server.port: 8443
POM.XML：
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.projet.pfa</groupId>
<artifactId>projetpfa</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>projetpfa</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-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</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-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>nz.net.ultraq.thymeleaf</groupId>
<artifactId>thymeleaf-layout-dialect</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
答案 0 :(得分：0)
我向您推荐Vlad Mihalcea的博客，我在那里学到了很多有关Hibernate的知识。在这里您还可以找到ManyToMany relationships
的示例您应该转义列名，例如用joinColumns = { @JoinColumn(name = "id_foramteur") }代替j oinColumns = { @JoinColumn(name = "idForamteur") }。
使用Lombok，您只需一个注释就可以摆脱getter和setter的问题。