Hibernate一对一单向外键关联

一、一对一单向外键关联：

　　一对一单向外键关联主要用到了以下两个注解：

　　1、OneToOne(cascade=CasecadeTYPE.ALL);

　　　　cascade=CasecadeTYPE.ALL：表示的是表之间的级联关系，比如级联删除，级联更新等，ALL表示的是全级联。

　　2、JoinColumn(name="sid" unique=true);

　　　　JoinColumn：表示将被控类的外键写在主控类中

　　主要是用到主表中。

　　需要注意的点是：在保存时应该先保存外键对象再保存主表对象；

问题一：在编写实体类Students.java的时候发生一个错误：

Type mismatch: cannot convert from CascadeType to CascadeType[]

检查之后发现错误是导致的原因是注解注解引用的包出现了问题：

@OneToOne(cascade=CascadeType.ALL)//表示全级联关系
@Column(name="pid" unique=true)

导致错误的包：

import org.hibernate.annotations.GenericGenerator;

import org.hibernate.metamodel.binding.CascadeType;

正确的包：

import javax.persistence.OneToOne;

问题一：在一切都准备好了，要生成表结构的同时出现了第二个问题：问题的描述是这样的：

2016-4-17 10:38:46 org.hibernate.annotations.common.Version <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}

2016-4-17 10:38:46 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {4.2.21.Final}

2016-4-17 10:38:46 org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

2016-4-17 10:38:46 org.hibernate.cfg.Environment buildBytecodeProvider

INFO: HHH000021: Bytecode provider name : javassist

2016-4-17 10:38:46 org.hibernate.cfg.Configuration configure

INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml

2016-4-17 10:38:46 org.hibernate.cfg.Configuration getConfigurationInputStream

INFO: HHH000040: Configuration resource: /hibernate.cfg.xml

2016-4-17 10:38:46 org.hibernate.cfg.Configuration doConfigure

INFO: HHH000041: Configured SessionFactory: null

2016-4-17 10:38:46 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)

2016-4-17 10:38:46 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000115: Hibernate connection pool size: 20

2016-4-17 10:38:46 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000006: Autocommit mode: false

2016-4-17 10:38:46 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]

2016-4-17 10:38:46 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000046: Connection properties: {user=root, password=****}

2016-4-17 10:38:47 org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect

2016-4-17 10:38:47 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation

INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4

最主要的是这一句：

INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4
貌似是我的jdbc的版本太低，所以导致测试没有通过。但是这不是导致错误的主要原因，版本低一般不会导致问题出现，

有一篇博客有同样的问题但是还是执行成功了：http://blog.csdn.net/xwin1989/article/details/7380736

最主要的原因是如下的报错信息：

org.hibernate.AnnotationException: @Column(s) not allowed on a @OneToOne property: oto_fk.Students.card

    at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1745)

    at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:895)

    at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:728)

    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3625)

    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3579)

    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1381)

    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1786)

    at oto_fk.TestStudents.testShemaExport(TestStudents.java:24)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)

    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)

    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)

    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)

    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)

    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)

    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)

    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)

    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)

    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)

    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)

    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)

    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)

    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

我的Students.java实体类的类容是这样的：

package oto_fk;

import java.io.Serializable;

import java.util.Date;

import javax.persistence.CascadeType;

import javax.persistence.Column;

import javax.persistence.Embedded;

import javax.persistence.EmbeddedId;

import javax.persistence.Entity; /*JPA注解*/

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.OneToOne;

import javax.persistence.Table;

import javax.persistence.Transient;

/**

 * 学生实体类

 * @author Administrator

 *

 */

//@Entity(name="t_students")

@Entity//表示这是一个实体类

//schema:表示数据库的名称

//name:表示数据库的表名

//Embedddable注解表示一个非Entity类，但是可以嵌入到另外一个实体类中作为属性而存在

public class Students implements Serializable{

    private IdCard card;

    private int sid;  //将学号改成字符串类型

    private String gender; //性别

    private Date birthday;//出生日期

    private String major;//专业

    public Students(IdCard card,int sid, String gender, Date birthday,

            String major) {

        super();

        this.card = card;

        this.sid = sid;

        this.gender = gender;

        this.birthday = birthday;

        this.major = major;

    }

    @OneToOne(cascade=CascadeType.ALL)//表示全 级联关系

    @Column(name="pid", unique=true)

    public IdCard getCard() {

        return card;

    }

    public void setCard(IdCard card) {

        this.card = card;

    }

    @Id

    @GeneratedValue//主键自增

    public int getSid() {

        return sid;

    }

    public void setSid(int sid) {

        this.sid = sid;

    }

    public String getGender() {

        return gender;

    }

    public void setGender(String gender) {

        this.gender = gender;

    }

    public Date getBirthday() {

        return birthday;

    }

    public void setBirthday(Date birthday) {

        this.birthday = birthday;

    }

    public String getMajor() {

        return major;

    }

    public void setMajor(String major) {

        this.major = major;

    }

    public Students()

    {

    }

}

导致错误的原因是：

 @OneToOne(cascade=CascadeType.ALL)//表示全 级联关系

    @Column(name="pid", unique=true)

    public IdCard getCard() {

        return card;

    }

应该改成：

    @OneToOne(cascade=CascadeType.ALL)//表示全 级联关系

    @JoinColumn(name="pid", unique=true)

    public IdCard getCard() {

        return card;

    }

以下将正确执行的代码贴出：

1、 students.java实体类(主控类)：

package oto_fk;

import java.io.Serializable;

import java.util.Date;

import javax.persistence.CascadeType;

import javax.persistence.Column;

import javax.persistence.Embedded;

import javax.persistence.EmbeddedId;

import javax.persistence.Entity; /*JPA注解*/

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.OneToOne;

import javax.persistence.Table;

import javax.persistence.Transient;

/**

 * 学生实体类

 * @author Administrator

 *

 */

//@Entity(name="t_students")

@Entity//表示这是一个实体类

//schema:表示数据库的名称

//name:表示数据库的表名

//Embedddable注解表示一个非Entity类，但是可以嵌入到另外一个实体类中作为属性而存在

public class Students implements Serializable{

    private IdCard card;

    private int sid;  //将学号改成字符串类型

    private String gender; //性别

    private Date birthday;//出生日期

    private String major;//专业

    public Students(IdCard card,int sid, String gender, Date birthday,

            String major) {

        super();

        this.card = card;

        this.sid = sid;

        this.gender = gender;

        this.birthday = birthday;

        this.major = major;

    }

    @OneToOne(cascade=CascadeType.ALL)//表示全 级联关系

    @JoinColumn(name="pid", unique=true)

    public IdCard getCard() {

        return card;

    }

    public void setCard(IdCard card) {

        this.card = card;

    }

    @Id

    @GeneratedValue//主键自增

    public int getSid() {

        return sid;

    }

    public void setSid(int sid) {

        this.sid = sid;

    }

    public String getGender() {

        return gender;

    }

    public void setGender(String gender) {

        this.gender = gender;

    }

    public Date getBirthday() {

        return birthday;

    }

    public void setBirthday(Date birthday) {

        this.birthday = birthday;

    }

    public String getMajor() {

        return major;

    }

    public void setMajor(String major) {

        this.major = major;

    }

    public Students()

    {

    }

}

2、IdCard实体类(被控类)：

package oto_fk;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import org.hibernate.annotations.GenericGenerator;

/*身份证类*/

@Entity

public class IdCard {

    private String pid;//身份证号

    private String sname;//学生姓名

    //无参数的构造器

    public IdCard()

    {

    }

    //带参数的构造器

    public IdCard(String pid, String sname) {

        super();

        this.pid = pid;

        this.sname = sname;

    }

    @Id//指定主键

    @Column(length=18)//指定身份证的长度

    //主键生成策略

    @GenericGenerator(name="pid",strategy="assigned")

    @GeneratedValue(generator="pid")

    public String getPid() {

        return pid;

    }

    public void setPid(String pid) {

        this.pid = pid;

    }

    public String getSname() {

        return sname;

    }

    public void setSname(String sname) {

        this.sname = sname;

    }

}

3、Hibernate.cfg.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC

        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<!-- old: http://hibernate.sourceforge.net/hibernate-configuration-3.6.dtd -->

<!-- new: http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd -->

<!--    : http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd -->

<hibernate-configuration>

<session-factory>

    <!-- 显示sql语句 -->

    <property name="show_sql">true</property>

    <property name="myeclipse.connection.profile">bookshop</property>

    <!-- <property name="connection.url">

        jdbc:mysql://localhost:3306/bookshop

        jdbc:mysql://localhost:3306/database?useUnicode=true&amp;characterEncoding=UTF-8

    </property> -->

    <property name="connection.url">jdbc:mysql://localhost:3306/hibernate?useUnicode=true&amp;characterEncoding=UTF-8</property>

    <property name="connection.username">root</property>

    <property name="connection.password">woaiwojia..123</property>

    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>

    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

    <property name="format_sql">true</property>

    <property name="hbm2ddl.auto">update</property>

    <property name="hibernate.current_session_context_class">thread</property>

    <!-- 将实体类映射到数据库 -->

    <mapping class="oto_fk.Students"/>

    <mapping class="oto_fk.IdCard"/>

</session-factory>

</hibernate-configuration>

4、测试用例：

 package oto_fk;

 import org.hibernate.SessionFactory;

 import org.hibernate.cfg.Configuration;

 import org.hibernate.service.ServiceRegistry;

 import org.hibernate.service.ServiceRegistryBuilder;

 import org.hibernate.tool.hbm2ddl.SchemaExport;

 import org.junit.Test;

 public class TestStudents {

     @Test

     public void testShemaExport(){

         //创建Hibernate配置对象

         Configuration configuration = new Configuration().configure();

         //创建服务注册对象

         ServiceRegistry serviceRegistry =

                 new ServiceRegistryBuilder()

         .applySettings(configuration.getProperties())

         .buildServiceRegistry();

         //创建sessionFactory

         SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

         //生成SchemaExport对象

         SchemaExport export = new SchemaExport(configuration);

         //调用schemaExport的create生成数据库表结构

         export.create(true, true);

     }

 }

5、数据库表生成log:

2016-4-17 10:53:56 org.hibernate.annotations.common.Version <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}

2016-4-17 10:53:56 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {4.2.21.Final}

2016-4-17 10:53:56 org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

2016-4-17 10:53:56 org.hibernate.cfg.Environment buildBytecodeProvider

INFO: HHH000021: Bytecode provider name : javassist

2016-4-17 10:53:56 org.hibernate.cfg.Configuration configure

INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml

2016-4-17 10:53:56 org.hibernate.cfg.Configuration getConfigurationInputStream

INFO: HHH000040: Configuration resource: /hibernate.cfg.xml

2016-4-17 10:53:56 org.hibernate.cfg.Configuration doConfigure

INFO: HHH000041: Configured SessionFactory: null

2016-4-17 10:53:56 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)

2016-4-17 10:53:56 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000115: Hibernate connection pool size: 20

2016-4-17 10:53:56 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000006: Autocommit mode: false

2016-4-17 10:53:56 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]

2016-4-17 10:53:56 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000046: Connection properties: {user=root, password=****}

2016-4-17 10:53:56 org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect

2016-4-17 10:53:56 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation

INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4

2016-4-17 10:53:57 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService

INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)

2016-4-17 10:53:57 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>

INFO: HHH000397: Using ASTQueryTranslatorFactory

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000228: Running hbm2ddl schema update

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000102: Fetching database metadata

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000396: Updating schema

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata

INFO: HHH000262: Table not found: IdCard

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata

INFO: HHH000262: Table not found: Students

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata

INFO: HHH000262: Table not found: IdCard

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata

INFO: HHH000262: Table not found: Students

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata

INFO: HHH000262: Table not found: IdCard

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata

INFO: HHH000262: Table not found: Students

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000232: Schema update complete

2016-4-17 10:53:57 org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.SchemaExport execute

INFO: HHH000227: Running hbm2ddl schema export

2016-4-17 10:53:57 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)

2016-4-17 10:53:57 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000115: Hibernate connection pool size: 20

2016-4-17 10:53:57 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000006: Autocommit mode: false

2016-4-17 10:53:57 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]

2016-4-17 10:53:57 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000046: Connection properties: {user=root, password=****}

    alter table Students

        drop

        foreign key FK_mryi31xkbwbosevquurf60ivb

    drop table if exists IdCard

    drop table if exists Students

    create table IdCard (

        pid varchar(18) not null,

        sname varchar(255),

        primary key (pid)

    )

    create table Students (

        sid integer not null auto_increment,

        birthday datetime,

        gender varchar(255),

        major varchar(255),

        pid varchar(18),

        primary key (sid)

    )

    alter table Students

        add constraint UK_mryi31xkbwbosevquurf60ivb unique (pid)

    alter table Students

        add index FK_mryi31xkbwbosevquurf60ivb (pid),

        add constraint FK_mryi31xkbwbosevquurf60ivb

        foreign key (pid)

        references IdCard (pid)

2016-4-17 10:53:57 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop

INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]

2016-4-17 10:53:57 org.hibernate.tool.hbm2ddl.SchemaExport execute

INFO: HHH000230: Schema export complete

6、数据库表生成情况:

7、编写一个测试用例来测试一对一单向外键关联的效果:

@Test

    public void addStudents()

    {

        //创建Hibernate配置对象

        Configuration configuration = new Configuration().configure();

        //创建服务注册对象

        ServiceRegistry serviceRegistry =

                new ServiceRegistryBuilder()

        .applySettings(configuration.getProperties())

        .buildServiceRegistry();

        //创建sessionFactory

        SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

        //创建会话对象

        Session session = sessionFactory.getCurrentSession();

        //开启事务

        Transaction tx = session.beginTransaction();

        //生成一个学生身份证对象

        IdCard card = new IdCard("888888888888888888","刘德华");

        //生成一个学生对象

        Students stu = new Students(card,"男",new Date(),"计算机");

        //先保存被控表对象(身份证)

        session.save(card);

        session.save(stu);

        //提交事务

        tx.commit();

Log：

2016-4-17 11:19:45 org.hibernate.annotations.common.Version <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}

2016-4-17 11:19:45 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {4.2.21.Final}

2016-4-17 11:19:45 org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

2016-4-17 11:19:45 org.hibernate.cfg.Environment buildBytecodeProvider

INFO: HHH000021: Bytecode provider name : javassist

2016-4-17 11:19:45 org.hibernate.cfg.Configuration configure

INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml

2016-4-17 11:19:45 org.hibernate.cfg.Configuration getConfigurationInputStream

INFO: HHH000040: Configuration resource: /hibernate.cfg.xml

2016-4-17 11:19:45 org.hibernate.cfg.Configuration doConfigure

INFO: HHH000041: Configured SessionFactory: null

2016-4-17 11:19:45 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)

2016-4-17 11:19:45 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000115: Hibernate connection pool size: 20

2016-4-17 11:19:45 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000006: Autocommit mode: false

2016-4-17 11:19:45 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]

2016-4-17 11:19:45 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000046: Connection properties: {user=root, password=****}

2016-4-17 11:19:46 org.hibernate.dialect.Dialect <init>

INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect

2016-4-17 11:19:46 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation

INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4

2016-4-17 11:19:46 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService

INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)

2016-4-17 11:19:46 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>

INFO: HHH000397: Using ASTQueryTranslatorFactory

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000228: Running hbm2ddl schema update

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000102: Fetching database metadata

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000396: Updating schema

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000261: Table found: hibernate.idcard

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000037: Columns: [pid, sname]

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000108: Foreign keys: []

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000126: Indexes: [primary]

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000261: Table found: hibernate.students

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000037: Columns: [birthday, sid, gender, pid, major]

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000108: Foreign keys: [fk_mryi31xkbwbosevquurf60ivb]

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.TableMetadata <init>

INFO: HHH000126: Indexes: [primary, fk_mryi31xkbwbosevquurf60ivb, uk_mryi31xkbwbosevquurf60ivb]

2016-4-17 11:19:47 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

INFO: HHH000232: Schema update complete

Hibernate:

    insert

    into

        IdCard

        (sname, pid)

    values

        (?, ?)

Hibernate:

    insert

    into

        Students

        (birthday, pid, gender, major)

    values

        (?, ?, ?, ?)

数据库数据插入情况：

IdCard表

Students表：

一对一的单向外键关联到此结束，转载的同仁注明出处。谢谢！

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