Hibernate：OneToMany関係WITHOUTH循環依存性なし

私はOneToManyの2つのエンティティを持つデータモデルを持っています。 1つのマシンには多くの特性があります。Hibernate：OneToMany関係WITHOUTH循環依存性なし

問題：私は周期的な依存関係のないエンティティを作成しようとしています。

しかし、私は問題を取得：

Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/spring-config.xml]: 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:1574) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) 
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4842) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397) 
    at java.util.concurrent.FutureTask.run(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:1225) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.access$600(EntityManagerFactoryBuilderImpl.java:119) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:853) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843) 
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842) 
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) 
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343) 
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570) 
    ... 21 more 
Caused by: org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: machine, for columns: [org.hibernate.mapping.Column(characteristics)] 
    at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:336) 
    at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:310) 
    at org.hibernate.mapping.Property.isValid(Property.java:241) 
    at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:496) 
    at org.hibernate.mapping.RootClass.validate(RootClass.java:270) 
    at org.hibernate.cfg.Configuration.validate(Configuration.java:1358) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1849) 
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) 
    ... 29 more

マイデータベース：

マシン：

：

文を作成します

CREATE TABLE `machine` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `name` varchar(45) NOT NULL, 
    `description` varchar(45) NOT NULL, 
    PRIMARY KEY (`id`) 
) ENGINE=InnoDB AUTO_INCREMENT=31 DEFAULT CHARSET=utf8

エンティティ：

@Entity 
@Table(name = "machine") 
public class Machine { 
    private int machine_id; 

    private String name; 

    private String description; 

    private Set<Characteristic> characteristics; 

    public Set<Characteristic> getCharacteristics() { 
     return characteristics; 
    } 

    public void setCharacteristics(Set<Characteristic> characteristics){ 
     this.characteristics = characteristics; 
    } 

    public Machine(){} 

    public Machine(String name, String description){ 
     this.name = name; 
     this.description = description; 
    } 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name="id") 
    public int getId() { 
     return machine_id; 
    } 

    public void setId(int machine_id) { 
     this.machine_id = machine_id; 
    } 

    @Column(name="name") 
    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    @Column(name="description") 
    public String getDescription() { 
     return description; 
    } 

    public void setDescription(String description) { 
     this.description = description; 
    } 
}

特性

create文：

CREATE TABLE `characteristic` (
    `characteristic_id` int(11) NOT NULL AUTO_INCREMENT, 
    `machine_id` int(11) NOT NULL DEFAULT '0', 
    `name` varchar(45) DEFAULT NULL, 
    `description` varchar(45) DEFAULT NULL, 
    `type` int(11) NOT NULL, 
    `value` int(11) DEFAULT NULL, 
    PRIMARY KEY (`characteristic_id`), 
) ENGINE=InnoDB AUTO_INCREMENT=26 DEFAULT CHARSET=latin1

エンティティ：

@Entity 
@Table(name = "characteristic") 
public class Characteristic { 
    private int characteristic_id; 

    private String name; 

    private String description; 

    private int type; 

    private int value; 

    public Characteristic() {} 

    public Characteristic(String description, int type, int value) { 
     this.description = description; 
     this.type = type; 
     this.value = value; 
    } 

    public Characteristic(int characteristic_id, String description, int type, int value) { 
     this.characteristic_id = characteristic_id; 
     this.description = description; 
     this.type = type; 
     this.value = value; 
    } 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name="characteristic_id") 
    public int getCharacteristic_Id() { 
     return characteristic_id; 
    } 

    public void setCharacteristic_Id(int characteristic_id) { 
     this.characteristic_id = characteristic_id; 
    } 

    @Column(name="name") 
    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    @Column(name="description") 
    public String getDescription() { 
     return description; 
    } 

    public void setDescription(String description) { 
     this.description = description; 
    } 

    @Column(name="type") 
    public int getType() { 
     return type; 
    } 

    public void setType(int type) { 
     this.type = type; 
    } 

    @Column(name="value") 
    public int getValue() { 
     return value; 
    } 

    public void setValue(int value) { 
     this.value = value; 
    } 
}

春-config.xmlの

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:jpa="http://www.springframework.org/schema/data/jpa" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/data/jpa 
    http://www.springframework.org/schema/data/jpa/spring-jpa.xsd 
    http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 

<context:component-scan base-package="com.mego.smscloud" /> 

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
     <property name="driverClassName" value="com.mysql.jdbc.Driver"/> 
     <property name="url" value="jdbc:mysql://localhost:3306/maschinedb?serverTimezone=UTC"/> 
     <property name="username" value="root"/> 
     <property name="password" value=""/> 
    </bean> 

    <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
     <property name="showSql" value="true"/> 
     <property name="generateDdl" value="true"/> 
     <property name="database" value="MYSQL"/> 
    </bean> 

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="dataSource" ref="dataSource"/> 
     <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/> 
     <property name="packagesToScan" value="com.mego.smscloud.entity"/> 
    </bean> 

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"/> 

    <jpa:repositories base-package="com.mego.smscloud.repository" /> 

</beans>

出典

2016-06-28 jublikon

それは単に特性と機械との間のマッピングに問題があります。ログは、Hibernateがどのタイプをマッピングに使用するかを知らないことを示します。 MachineクラスのgetCharacteristics（）メソッドに@OneToManyアノテーションを追加する必要があります。 https://docs.jboss.org/hibernate/annotations/3.4/reference/en/html_single/#entity-mapping-association-collections

@Entity 
@Table(name = "machine") 
public class Machine { 
    private int machine_id; 

    private String name; 

    private String description; 

    private Set<Characteristic> characteristics; 

    @OneToMany 
    @JoinColumn(name="machine_id") 
    public Set<Characteristic> getCharacteristics() { 
     return characteristics; 
    } 

    public void setCharacteristics(Set<Characteristic> characteristics){ 
     this.characteristics = characteristics; 
    } 

    public Machine(){} 

    public Machine(String name, String description){ 
     this.name = name; 
     this.description = description; 
    } 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name="id") 
    public int getId() { 
     return machine_id; 
    } 

    public void setId(int machine_id) { 
     this.machine_id = machine_id; 
    } 

    @Column(name="name") 
    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    @Column(name="description") 
    public String getDescription() { 
     return description; 
    } 

    public void setDescription(String description) { 
     this.description = description; 
    } 
}

希望

出典

2016-06-28 11:29:40

はあなたのJSONシリアライズのための構成を追加することができ、このヘルプ：

あなたは（とやjointableなし）セクションOneToMany単方向でコレクション・マッピングのために、ここで見ているだろうか？ –

あなたの答えに感謝します。いくつかのサンプルコードを投稿していただけますか？私はすでに4日間それに固執しているので私はとても混乱しています。 – jublikon

私の投稿に構成ファイルを追加しました – jublikon

Hibernate：OneToMany関係WITHOUTH循環依存性なし

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