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| 映射检索演示数组 |
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/////////////////////////////////////////////////////////////////////////
import java.util.Date;
import java.util.List;
import org.hibernate.*;
import org.hibernate.criterion.*;
public class SimpleRetrieveTest {
public static void main(String[] args) {
HibernateUtil.setup("create table A ( id int);");
HibernateUtil.setup("create table B ( id int, aid int);");
// hibernate code start
Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
A a = new A();
B b1 = new B();
B b2 = new B();
a.setBs( new B[] {b1, b2} );
session.save(a);
a = (A) session.get( A.class, a.getId() );
for(int i=0;i<a.getBs().length;i++){
System.out.println(a.getBs()[i].getId());
}
tx.commit();
HibernateUtil.closeSession();
HibernateUtil.sessionFactory.close();
// hibernate code end
HibernateUtil.checkData("select * from A");
HibernateUtil.checkData("select * from B");
}
}
/////////////////////////////////////////////////////////////////////////
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping >
<class name="A" lazy="true">
<id name="id">
<generator class="increment"/>
</id>
<array name="bs" cascade="all" fetch="join" >
<key column="aid"/>
<list-index column="id"/>
<one-to-many class="B"/>
</array>
</class>
<class name="B" lazy="true">
<id name="id">
<generator class="increment"/>
</id>
</class>
</hibernate-mapping>
/////////////////////////////////////////////////////////////////////////
/**
* @author Emmanuel Bernard
*/
public class A {
private Integer id;
private B[] bs;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public B[] getBs() {
return bs;
}
public void setBs(B[] bs) {
this.bs = bs;
}
}
/////////////////////////////////////////////////////////////////////////
/**
* @author Emmanuel Bernard
*/
public class B {
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
}
/////////////////////////////////////////////////////////////////////////
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="connection.url">jdbc:hsqldb:data/tutorial</property>
<property name="connection.username">sa</property>
<property name="connection.password"></property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.HSQLDialect</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<mapping resource="A.hbm.xml"/>
</session-factory>
</hibernate-configuration>
/////////////////////////////////////////////////////////////////////////
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 HibernateMapArrayGetDemo.zip( 4,578 k) |
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