SS1.1_Hibernate_ByManual 手工创建第一个Hibernate应用

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手工创建第一个Hibernate应用
1.创建Hibernate的配置文件
2.创建持久化类
3.创建对象 - 关系映射文件
4.通过Hibernate API编写访问数据库的代码

1.创建Hibernate的配置文件hibernate.cfg.xml

<?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="connection.driver_class">com.mysql.jdbc.Driver</property>
 <property name="connection.url">jdbc:mysql://localhost:3306/testdb</property>
 <property name="connection.username">root</property>
 <property name="connection.password">123456</property>
 <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
 <property name="show_sql">true</property>
 <property name="hbm2ddl.auto">create</property>
 <property name="current_session_context_class">thread</property>
 <mapping resource="net/nw/vo/Student.hbm.xml" />
    </session-factory>
</hibernate-configuration>

2.创建持久化类

package net.nw.vo;
public class Student {
private int sid;
private String sname;

public int getSid() {
return sid;
}
public void setSid(int sid) {
this.sid = sid;
}
public String getSname() {
return sname;
}
public void setSname(String sname) {
this.sname = sname;
}
}

3.创建对象 - 关系映射文件,注意： 别忘记在hibernate.cfg.xml配置文件中添加<mapping resource="net/nw/vo/Student.hbm.xml" />资源映射

<?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映射，包名对应java的包名 -->
<hibernate-mapping package="net.nw.vo">
    <!-- 指定对实体类net.nw.vo.Student与数据库关系表student的映射关系，当两者相同时，可以不指定table -->
    <class name="net.nw.vo.Student" table="student">
         <!-- id指定实体属性(name="sid")与关系表主键(column="sid")之间映射关系 -->
         <id name="sid" column="sid" type="int"></id>
         <!-- 实体属性与关系表字段之间映射关系，如果两者名字相同，column可以不写 -->
         <property name="sname" column="sname" type="string"></property>
    </class>
</hibernate-mapping>

4. 创建log4j.properties文件

# Configure logging for testing: optionally with log file
log4j.rootLogger=WARN, stdout
# log4j.rootLogger=WARN, stdout, logfile

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n

log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/spring.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n

5.通过Hibernate API编写访问数据库的代码

package net.nw.dao;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import net.nw.vo.Student;
public class HibernateTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction();
try{
Student s = new Student();
s.setSid(1);
s.setSname("zhangsan");
session.save(s);
tx.commit();
}catch(Exception ex){
tx.rollback();
ex.printStackTrace();


}finally{
if(session !=null){
session.close();
}
}
}
}

6. 创建数据库testdb

7.测试运行程序代码，运行效果截图如下：

本项目源码下载地址

mysql-connector-java-5.1.40.zip包：http://download.csdn.net/detail/zhengzizhi/9747510

项目源码：http://download.csdn.net/detail/zhengzizhi/9747513