Hibernate基础学习一

目录结构如下：
--src
|----sample
| |----entity
| | |----Message.java
| | |----Message.hbm.xml
| |
| |----ListMessages.java
| |----PopulateMessages.java
|
|----log4j.properties
|----hibernate.cfg.xml

需要用到的类库有：antlr.jar、asm.jar、cglib.jar、commons-collections.jar、commons-logging.jar、dom4j.jar、hibernate3.jar、jta.jar、log4j.jar、mysql-connector-java-bin.jar

用到的相关sql:
DROP database IF exists hibernate_test;
CREATE database hibernate_test;
use hibernate_test;
create table message(
id int(11) auto_increment,
message char(100),
primary key(id)
);

Message.java：

Java代码
package sample.entity;

public class Message {
private String message;

public Message(String message) {
this.message = message;
}

Message() {
}

public String getMessage() {
return this.message;
}

public void setMessage(String message) {
this.message = message;
}
}

package sample.entity;

public class Message {
private String message;

public Message(String message) {
this.message = message;
}

Message() {
}

public String getMessage() {
return this.message;
}

public void setMessage(String message) {
this.message = message;
}
}

Message.hbm.xml：

Xml代码
<?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="sample.entity.Message" table="message">
<id column="id" unsaved-value="-1" type="long">
<generator class="native" />
</id>
<property name="message" column="message" type="string" />
</class>
</hibernate-mapping>

<?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="sample.entity.Message" table="message">
<id column="id" unsaved-value="-1" type="long">
<generator class="native" />
</id>
<property name="message" column="message" type="string" />
</class>
</hibernate-mapping>

PopulateMessages.java：

Java代码
package sample;

import java.util.Date;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import sample.entity.Message;

public class PopulateMessages {
public static void main(String[] args) {
System.out.println("start...............");
SessionFactory factory = new Configuration().configure().buildSessionFactory();
Session session = factory.openSession();

session.beginTransaction();

Message m1 = new Message("Hibernated a message on " + new Date());
session.save(m1);

session.getTransaction().commit();

session.close();
System.out.println("end...............");
}
}

package sample;

import java.util.Date;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import sample.entity.Message;

public class PopulateMessages {
public static void main(String[] args) {
System.out.println("start...............");
SessionFactory factory = new Configuration().configure().buildSessionFactory();
Session session = factory.openSession();

session.beginTransaction();

Message m1 = new Message("Hibernated a message on " + new Date());
session.save(m1);

session.getTransaction().commit();

session.close();
System.out.println("end...............");
}
}

ListMessages.java：

Java代码
package sample;

import java.util.Iterator;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import sample.entity.Message;

public class ListMessages {
public static void main(String[] args) {
SessionFactory factory = new Configuration().configure().buildSessionFactory();
Session session = factory.openSession();

List<Message> messages = session.createQuery("from Message").list();
System.out.println("Found " + messages.size() + " message(s):");

Iterator<Message> i = messages.iterator();
while (i.hasNext()) {
Message msg = i.next();
System.out.println(msg.getMessage());
}

session.close();
}
}

package sample;

import java.util.Iterator;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import sample.entity.Message;

public class ListMessages {
public static void main(String[] args) {
SessionFactory factory = new Configuration().configure().buildSessionFactory();
Session session = factory.openSession();

List<Message> messages = session.createQuery("from Message").list();
System.out.println("Found " + messages.size() + " message(s):");

Iterator<Message> i = messages.iterator();
while (i.hasNext()) {
Message msg = i.next();
System.out.println(msg.getMessage());
}

session.close();
}
}

log4j.properties:

Java代码
### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

log4j.rootLogger=warn, stdout
log4j.logger.org.hibernate=info

### log JDBC bind parameters ###
log4j.logger.org.hibernate.type=info
log4j.logger.org.hibernate.tool.hbm2ddl=debug

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

log4j.rootLogger=warn, stdout
log4j.logger.org.hibernate=info

### log JDBC bind parameters ###
log4j.logger.org.hibernate.type=info
log4j.logger.org.hibernate.tool.hbm2ddl=debug hibernate.cfg.xml:

Xml代码
<?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>
<property name="hibernate.connection.url">
jdbc:mysql://localhost/hibernate_test
</property>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.connection.pool_size">0</property>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>

<!-- You will usually want to set this to true while debugging Hibernate queries -->
<property name="hibernate.show_sql">true</property>

<!-- "Import" the mapping resources here -->
<mapping resource="sample/entity/Message.hbm.xml" />

</session-factory>
</hibernate-configuration>