Hibernate,JPA注解@SecondaryTables
2015-03-31 22:03
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使用类一级的 @SecondaryTable或@SecondaryTables注解可以实现单个实体到多个表的映射. 使用 @Column或者 @JoinColumn注解中的table参数可指定某个列所属的特定表.
使用类一级的 @SecondaryTable或@SecondaryTables注解可以实现单个实体到多个表的映射. 使用 @Column或者 @JoinColumn注解中的table参数可指定某个列所属的特定表.
用例代码如下:
数据库DDL语句
1,CAT表
2,CAT_INFO表
3,CAT_INFO_2表
hibernate.cfg.xml
java类
实体类 - 基类
实体类
Dao
main
环境:JDK1.6,MAVEN,tomcat,eclipse
源码地址:http://files.cnblogs.com/files/xiluhua/hibernate%40SecondaryTables.rar
使用类一级的 @SecondaryTable或@SecondaryTables注解可以实现单个实体到多个表的映射. 使用 @Column或者 @JoinColumn注解中的table参数可指定某个列所属的特定表.
用例代码如下:
数据库DDL语句
1,CAT表
create table CAT ( id VARCHAR2(32 CHAR) not null, create_time TIMESTAMP(6), update_time TIMESTAMP(6), cat_name VARCHAR2(255 CHAR), first_name VARCHAR2(255 CHAR), last_name VARCHAR2(255 CHAR), version NUMBER(10) not null )
2,CAT_INFO表
create table CAT_INFO ( address VARCHAR2(255 CHAR), birthday TIMESTAMP(6), cat_id VARCHAR2(32 CHAR) not null )
3,CAT_INFO_2表
create table CAT_INFO_2 ( gender NUMBER(10), mobile VARCHAR2(255 CHAR), cat_id VARCHAR2(32 CHAR) not null )
hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- 数据库驱动配置 --> <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property> <property name="connection.driver_class">oracle.jdbc.OracleDriver</property> <property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property> <property name="connection.username">wxuatuser</property> <property name="connection.password">xlh</property> <property name="show_sql">true</property> <!-- 自动执行DDL属性是update,不是true --> <property name="hbm2ddl.auto">update</property> <!-- hibernate实体类 --> <mapping class="a6_SecondaryTable.CatSecondaryTables"/> </session-factory> </hibernate-configuration>
java类
实体类 - 基类
package model; import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.MappedSuperclass; import org.hibernate.annotations.GenericGenerator; /** * 实体类 - 基类 */ @MappedSuperclass public class BaseEntity implements Serializable { private static final long serialVersionUID = -6718838800112233445L; private String id;// ID private Date create_time;// 创建日期 private Date update_time;// 修改日期 @Id @Column(length = 32, nullable = true) @GeneratedValue(generator = "uuid") @GenericGenerator(name = "uuid", strategy = "uuid") public String getId() { return id; } public void setId(String id) { this.id = id; } @Column(updatable = false) public Date getCreate_time() { return create_time; } public void setCreate_time(Date create_time) { this.create_time = create_time; } public Date getUpdate_time() { return update_time; } public void setUpdate_time(Date update_time) { this.update_time = update_time; } @Override public int hashCode() { return id == null ? System.identityHashCode(this) : id.hashCode(); } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass().getPackage() != obj.getClass().getPackage()) { return false; } final BaseEntity other = (BaseEntity) obj; if (id == null) { if (other.getId() != null) { return false; } } else if (!id.equals(other.getId())) { return false; } return true; } }
实体类
package a6_SecondaryTable; import java.util.Date; import javax.persistence.AttributeOverride; import javax.persistence.AttributeOverrides; import javax.persistence.Column; import javax.persistence.Embedded; import javax.persistence.Entity; import javax.persistence.PrimaryKeyJoinColumn; import javax.persistence.SecondaryTable; import javax.persistence.SecondaryTables; import javax.persistence.Table; import javax.persistence.Version; import model.BaseEntity; import org.hibernate.annotations.DynamicInsert; import org.hibernate.annotations.DynamicUpdate; @Entity @DynamicInsert @DynamicUpdate @Table(name="CAT") @SecondaryTables( value = { @SecondaryTable(name="CAT_INFO",pkJoinColumns=@PrimaryKeyJoinColumn(name="CAT_ID")), @SecondaryTable(name="CAT_INFO_2",pkJoinColumns=@PrimaryKeyJoinColumn(name="CAT_ID")) }) public class CatSecondaryTables extends BaseEntity{ /** * 实体类 */ private static final long serialVersionUID = -2776330321385582872L; private String cat_name; private Name name; private int version; private String address; private Date birthday; private Integer gender; private String mobile; @Version public int getVersion() { return version; } public void setVersion(int version) { this.version = version; } public String getCat_name() { return cat_name; } public void setCat_name(String cat_name) { this.cat_name = cat_name; } @Embedded @AttributeOverrides({ @AttributeOverride(name = "first_name", column = @Column(name = "first_name")), @AttributeOverride(name = "last_name", column = @Column(name = "last_name")) }) public Name getName() { return name; } public void setName(Name name) { this.name = name; } @Column(name="ADDRESS", table="CAT_INFO") public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Column(name="BIRTHDAY", table="CAT_INFO") public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } @Column(name="GENDER", table="CAT_INFO_2") public Integer getGender() { return gender; } public void setGender(Integer gender) { this.gender = gender; } @Column(name="MOBILE", table="CAT_INFO_2") public String getMobile() { return mobile; } public void setMobile(String mobile) { this.mobile = mobile; } }
Dao
package daoUtil; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import org.hibernate.service.ServiceRegistry; import org.hibernate.service.ServiceRegistryBuilder; public class HibernateUtil { private static final SessionFactory sessionFactory; static { try { Configuration cfg = new Configuration().configure(); ServiceRegistry serviceRegistry = new ServiceRegistryBuilder() .applySettings(cfg.getProperties()).buildServiceRegistry(); sessionFactory = cfg.buildSessionFactory(serviceRegistry); } catch (Throwable ex) { throw new ExceptionInInitializerError(ex); } } public static Session getSession() throws HibernateException { return sessionFactory.openSession(); } public static Object save(Object obj){ Session session = HibernateUtil.getSession(); Transaction tx = null; try { tx = session.beginTransaction(); session.save(obj); tx.commit(); } catch (RuntimeException e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } return obj; } public static void delete(Class<?> clazz,String id){ Session session = HibernateUtil.getSession(); Transaction tx = null; try { tx = session.beginTransaction(); Object obj = session.get(clazz,id); session.delete(obj); tx.commit(); } catch (RuntimeException e) { if (tx != null) { tx.rollback(); } throw e; } finally { session.close(); } } }
main
package a6_SecondaryTable; import java.util.Date; import daoUtil.HibernateUtil; public class Test_SecondaryTables { public static void main(String[] args) { Name name = new Name(); CatSecondaryTables cat = new CatSecondaryTables(); cat.setCat_name("test7SecondaryTables2"); cat.setName(name); cat.setAddress("中华人民共和国"); cat.setBirthday(new Date()); cat.setGender(1); cat.setMobile("13012345678"); HibernateUtil.save(cat); System.out.println(cat.getId()); CatSecondaryTables cat1 = (CatSecondaryTables)HibernateUtil.getSession().get(CatSecondaryTables.class, cat.getId()); System.out.println(cat1.getId()); } }
环境:JDK1.6,MAVEN,tomcat,eclipse
源码地址:http://files.cnblogs.com/files/xiluhua/hibernate%40SecondaryTables.rar
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