Heibernate 入门笔记（一）---第一个demo

最近在学heibernate，是看马士兵老师的视频学的，在这里总结一下，做点笔记。关于heibernate的优点，大家可以在网上

百度，这里不做赘述，直接讲怎么使用heibernate

步骤一：新建项目，导入jar包

在这里讲一种新的导入jar包的方法，首先在myEclipse中点击windows>>preferences>>java>>Buid Path>>User Libraries 在右侧点击New ,在打开的窗口中输入"hibernate",点击OK,选择hibernate,点击Add jars,导入所需的jar包，我这里导入的比较多，大家按实际情况导入，然后点击OK;

新建一个java项目，右键BuidPath>>Add Libraries>>User Library 选择hibernate,点击OK，这样就导入hibernate的包了。

接下来还要导入数据库驱动包，根据大家所用数据库的种类自行导入即可

步骤二：新建数据库/数据表

我用的是sqlserver2008,这里贴出我的代码：

CREATE TABLE STUDENT
(
STUID INT PRIMARY KEY,
STUNAME VARCHAR(10),
STUSEX VARCHAR(5),
STUGRADE VARCHAR(10),
);

需要注意的是一定要设置主键，这关系到后面配置文件去连接数据表

步骤三：写javabean

在项目下建包hibernate，建类Student

package hibernate;

public class Student {
private int stuId;
private String stuName;
private String stuSex;
private String stuGrade;
public int getStuId() {
return stuId;
}
public void setStuId(int stuId) {
this.stuId = stuId;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuSex() {
return stuSex;
}
public void setStuSex(String stuSex) {
this.stuSex = stuSex;
}
public String getStuGrade() {
return stuGrade;
}
public void setStuGrade(String stuGrade) {
this.stuGrade = stuGrade;
}

}

步骤四：写Student.hbm.xml配置文件

,右键包 hibernate,点击new >>file>>输入Student.hbm.xml，点击OK，下面是我配置文件中的代码：

<?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="hibernate.Student">
<id name="stuId"></id>
<property name="stuName"/>
<property name="stuSex"/>
<property name="stuGrade"/>
</class>

</hibernate-mapping>

<class name="hibernate.Student"> name为javabean的路径

<id name="stuId"></id> id中name的值对应主键

步骤五：hibernate.cfg.xml

右键项目，new>>file>>输入hibernate.cfg.xml，文件内容如下：

<?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>

<!-- Database connection settings -->
<property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
<property name="connection.url">jdbc:sqlserver://localhost:1433;DatabaseName=Study</property>
<property name="connection.username">sa</property>
<property name="connection.password">aaaaaa</property>

<!-- JDBC connection pool (use the built-in) -->
<!--  <property name="connection.pool_size">1</property> -->

<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.HSQLDialect</property>

<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>

<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>

<mapping resource="hibernate/Student.hbm.xml"/>

</session-factory>

</hibernate-configuration>

对应文件修改driver,url,username,password等等

最后一步：测试类

新建一个包Test,新建类StudentTest:

package test;

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

import hibernate.Student;

public class StudentTest {

public static void main(String[] args) {
Student s=new Student();
s.setStuId(111);
s.setStuName("张三");
s.setStuSex("男");
s.setStuGrade("大二");
Configuration cfg=new Configuration().configure();
SessionFactory sf=cfg.buildSessionFactory();
Session session=sf.openSession();
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
session.close();
sf.close();
}
}

然后运行就可以啦，这样不需要sql语句就可以将数据插入数据表中