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