Hibernate 与hsqldb结合

Hibernate是用来操作数据库的，当然要结合数据库来使用。但是公司的电脑是不能随便安装软件的，即使是mysql的免安装版，也要把驱动文件放到windows下，没有权限是做不到的。因此推荐一个hsqldb数据库，是java语言写的。不需要安装。下面介绍如何结合hibernate和hsqldb。

1、下载hsqldb

http://hsqldb.org/

将下载下来的文件解压，文件结构如图

打开demo文件夹

注意里面的几个文件runManager.bat，runServer.bat，my_server.bat，runManagerSwing.bat

runServer.bat是来开启数据库服务，runManager.bat和runManagerSwing.bat是数据库管理界面，可以在里面输入sql语句来执行。注意my_server.bat是自己加进去的，内容是：

cd ../data

java -cp ../lib/hsqldb.jar org.hsqldb.Server -database.0 file:mydb -dbname.0 hibernate

hibernate是数据库名，自己随便写，也可以写成mydb等等

2、启动hsqldb

先执行my_server.bat,然后执行runServer.bat，最后执行runManager.bat或者runManagerSwing.bat，本例中以runManager.bat为例，启动界面，配置如图

注意url中不要忘记hibernate这个数据库名。

点击ok，如图，里面有个名字为user的表

Hsqldb就配置到这里。

3、下面hibernate的配置，首先自己建一个user library，把hibernate所有的必须的jar包都添加进去，在hibernate文件夹中有，自己添加一下。

然后新建一个java项目hibernateDemo,将刚才自己定义的库加到工程里。配置到此结束。

4、我们现在src文件下定义hibernate的配置文件hibernate.cfg.xml文件，内容如下

[xhtml] view plain copy print ?

<?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="myeclipse.connection.profile">hsql</property>
<property name="connection.url">jdbc:hsqldb:hsql://localhost/hibernate</property>
<property name="connection.username">sa</property>
<property name="connection.password"></property>
<property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="dialect">org.hibernate.dialect.HSQLDialect</property>
<property name="show_sql">true</property>
<property name="connection.autocommit">true</property>
<property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<mapping resource="com/zhoubo/hibernate/User.hbm.xml" />
</session-factory>
</hibernate-configuration>

<?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="myeclipse.connection.profile">hsql</property> <property name="connection.url">jdbc:hsqldb:hsql://localhost/hibernate</property> <property name="connection.username">sa</property> <property name="connection.password"></property> <property name="connection.driver_class">org.hsqldb.jdbcDriver</property> <property name="dialect">org.hibernate.dialect.HSQLDialect</property> <property name="show_sql">true</property> <property name="connection.autocommit">true</property> <property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property> <mapping resource="com/zhoubo/hibernate/User.hbm.xml" /> </session-factory> </hibernate-configuration>

5、在文件夹src下定义一个package com.zhoubo.hibernate 在里面新建一个User类，如下

[java] view plain copy print ?

package com.zhoubo.hibernate;
public class User {
private String id;
private String password;
private char sex;
private int age;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public char getSex() {
return sex;
}
public void setSex(char sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}

package com.zhoubo.hibernate; public class User { private String id; private String password; private char sex; private int age; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public char getSex() { return sex; } public void setSex(char sex) { this.sex = sex; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }

在里面定义一个User类的配置文件User.hbm.xml

[xhtml] view plain copy print ?

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.zhoubo.hibernate.User" table="User">
<id name="id" column="User_id">
<generator class="uuid"/>
</id>
<property name="password"/>
<property name="sex"/>
<property name="age"/>
</class>
</hibernate-mapping>

<?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="com.zhoubo.hibernate.User" table="User"> <id name="id" column="User_id"> <generator class="uuid"/> </id> <property name="password"/> <property name="sex"/> <property name="age"/> </class> </hibernate-mapping>

并且在hibernate.cfg.xml中来注册这个user.hbm.xml，也就是我们在hibernate.cfg.xml中看到的

下面我们就来通过hibernate来在数据库生成user表，定义一个DBExport类，如下

[java] view plain copy print ?

package com.zhoubo.hibernate;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class DBExport {
public static void main(String ...arg){
Configuration cfg = new Configuration().configure();
SchemaExport export = new SchemaExport(cfg);
export.create(true, true);
}
}

package com.zhoubo.hibernate; import org.hibernate.cfg.Configuration; import org.hibernate.tool.hbm2ddl.SchemaExport; public class DBExport { public static void main(String ...arg){ Configuration cfg = new Configuration().configure(); SchemaExport export = new SchemaExport(cfg); export.create(true, true); } }

可以通过desc user来查询表的属性，可以看到表已经生成了。

下面我们来在表中插入数据，定义一个hibernateUtil类和Client类，如下

[java] view plain copy print ?

package com.zhoubo.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtils {
private static SessionFactory factory ;
static {
try{
Configuration cfg = new Configuration().configure();
factory = cfg.buildSessionFactory();
}catch(Exception e){
e.printStackTrace();
}
}
public static Session getSession(){
return factory.openSession();
}
public static SessionFactory getSessionFactory(){
return factory;
}
public static void closeSession(Session session){
session.close();
}
}

package com.zhoubo.hibernate; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class HibernateUtils { private static SessionFactory factory ; static { try{ Configuration cfg = new Configuration().configure(); factory = cfg.buildSessionFactory(); }catch(Exception e){ e.printStackTrace(); } } public static Session getSession(){ return factory.openSession(); } public static SessionFactory getSessionFactory(){ return factory; } public static void closeSession(Session session){ session.close(); } }

[java] view plain copy print ?

package com.zhoubo.hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class Client {
public static void main(String ...args){
User user = new User();
Session session = null;
Transaction tx = null;
try{
session = HibernateUtils.getSession();
tx = session.beginTransaction();
user.setAge(18);
user.setPassword("hello");
user.setSex('m');
session.save(user);
tx.commit();
}catch(Exception e){
e.printStackTrace();
tx.rollback();
}finally{
HibernateUtils.closeSession(session);
}
}
}

package com.zhoubo.hibernate; import org.hibernate.Session; import org.hibernate.Transaction; public class Client { public static void main(String ...args){ User user = new User(); Session session = null; Transaction tx = null; try{ session = HibernateUtils.getSession(); tx = session.beginTransaction(); user.setAge(18); user.setPassword("hello"); user.setSex('m'); session.save(user); tx.commit(); }catch(Exception e){ e.printStackTrace(); tx.rollback(); }finally{ HibernateUtils.closeSession(session); } } }

通过查询，我们可以看到插入的值。

Hibernate 与hsqldb结合

你可能感兴趣的:(Hibernate 与hsqldb结合)