hibernate 小案例

Hibernate 的使用小案例

1 建一个实体类 Test.java
import java.util.Date;

public class Test {
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
private String name;
private Date birthday;
}

2 建实体映射文件Test.hbm.xml
<?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=”Test”>
<id name=”id”>
<generator/>
</id>
<property name=”name”/>
<property name=”birthday”/>
</class>
</hibernate-mapping>

3 配置hibernate.cfg.xml
<!DOCTYPE hibernate-configuration PUBLIC
“-//Hibernate/Hibernate Configuration DTD 3.0//EN”
“http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd”>

<hibernate-configuration>
<session-factory>
<property name=”hibernate.connection.driver_class”>com.mysql.jdbc.Driver</property>
<property name=”connection.url”>jdbc:mysql:///test</property>
<property name=”connection.username”>root</property>
<property name=”connection.password”>123</property>
<property name=”hbm2ddl.auto”>create</property>
<property name=”dialect”>org.hibernate.dialect.MySQLDialect</property>
<mapping resource=”Test.hbm.xml” />
</session-factory>
</hibernate-configuration>

4 编写测试该配置代码 Base.java
import java.util.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class Base {
public static void main(String[] args){
Configuration cfg = new Configuration();
cfg.configure();
SessionFactory sf = cfg.buildSessionFactory();
Session s = sf.openSession();
Transaction tx = s.beginTransaction();
Test test = new Test();
test.setBirthday(new Date());
test.setName(“name”);
s.save(test);
tx.commit();
s.close();
System.out.print(“end”);
}
}

标签