基于NetBeans7.0的Hibernate编程入门
基于NetBeans7.0的 Hebernate入门
1. 建立一个java项目JavaHibernat如图：
2. 新建一个数据连接：
3. 添加Hibernate库，如图：
4. 使用向导新建Hibernate配置文件：
结果自动生成如下文件：
hibernate.cfg.xml
<?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>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/book</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">123456</property>
</session-factory>
</hibernate-configuration>
5. 使用Hibernate逆向工程向导生成hibernate.reveng.xml文件：如图所示添加选中的数据表。
自动生成的文件：
hibernate.reveng.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-reverse-engineering PUBLIC "-//Hibernate/Hibernate Reverse Engineering DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-reverse-engineering-3.0.dtd " >
<hibernate-reverse-engineering>
<schema-selection match-catalog="book"/>
<table-filter match-name="admin"/>
</hibernate-reverse-engineering>
6. 使用Hibernate向导生成Hibernate映射文件和POJO（Plain Ordinary Java Object）文件：
生成的POJO文件是：
Admin.java
package javahibernate;
// Generated 2011-11-19 10:57:36 by Hibernate Tools 3.2.1.GA
/**
* Admin generated by hbm2java
*/
public class Admin implements java.io.Serializable {
private int UId;
private String UName;
private String UPass;
public Admin() {
}
public Admin(int UId) {
this.UId = UId;
}
public Admin(int UId, String UName, String UPass) {
this.UId = UId;
this.UName = UName;
this.UPass = UPass;
}
public int getUId() {
return this.UId;
}
public void setUId(int UId) {
this.UId = UId;
}
public String getUName() {
return this.UName;
}
public void setUName(String UName) {
this.UName = UName;
}
public String getUPass() {
return this.UPass;
}
public void setUPass(String UPass) {
this.UPass = UPass;
}
}
生成的Hibernate映射文件是：
Admin.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">
<!-- Generated 2011-11-19 10:57:36 by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
<class name="javahibernate.Admin" table="admin" catalog="book">
<id name="UId" type="int">
<column name="u_id" />
<generator class="assigned" />
</id>
<property name="UName" type="string">
<column name="u_Name" length="20" />
</property>
<property name="UPass" type="string">
<column name="u_Pass" length="20" />
</property>
</class>
</hibernate-mapping>
此时Hibernate配置文件hibernate.cfg.xml中，在<session-factory>标记内增加了映射信息：
<mapping resource="javahibernate/Admin.hbm.xml"/>
到此为止，基于Hibernate的持久化工作已准备就绪。所有的工作基本上是自动完成的。
7. 将下面的代码添加到主类中，运行项目即可。
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class JavaHibernate {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
Configuration config=new Configuration().configure();
SessionFactory sessionFactory=config.buildSessionFactory();
Admin user=new Admin();
user.setUId(3);
user.setUName("aaa");
user.setUPass("123456");
Session session=sessionFactory.openSession();
Transaction tx=session.beginTransaction();
session.save(user);
tx.commit();
session.close();
sessionFactory.close();
}
}
然后打开数据表可以验证运行是否成功。