hibernate学习

一、新建一个java工程名为：hibernate_0100_HelloWorld；

二、建jar包：com.bjsxt.hibernate

三、导入必要的jar包；

四、新建类：

Teacher：

View Code

package com.bjsxt.hibernate;



import javax.persistence.Entity;

import javax.persistence.Id;



@Entity

public class Teacher {

    private int id;

    private String name;

    private String title;

    

    @Id

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getTitle() {

        return title;

    }

    public void setTitle(String title) {

        this.title = title;

    }

}

Student：

View Code

package com.bjsxt.hibernate;



public class Student {

    private int id;

    private String name;

    private int age;

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    

    

}

Student.hbm.xml：

View Code

<?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="com.bjsxt.hibernate.Student">

        <id name="id" />

        <property name="name" />

        <property name="age" />

    </class>

    

</hibernate-mapping>

hibernate.cfg.xml：

View Code

<?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.mysql.jdbc.Driver</property>

        <property name="connection.url">jdbc:mysql://localhost/hibernate</property>

        <property name="connection.username">root</property>

        <property name="connection.password">admin</property>



        <!-- JDBC connection pool (use the built-in) -->

        <property name="connection.pool_size">1</property>



        <!-- SQL dialect -->

        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>



        <!-- Enable Hibernate's automatic session context management -->

        <property name="current_session_context_class">thread</property>



        <!-- Disable the second-level cache  -->

        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</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">update</property>



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

        <mapping class="com.bjsxt.hibernate.Teacher"/>

    </session-factory>



</hibernate-configuration>

Test：

View Code

package com.bjsxt.hibernate;



import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.AnnotationConfiguration;



public class Test {

    public static void main(String[] args) {

        Student s = new Student();

        s.setId(1);

        s.setName("zhangsan");

        s.setAge(8);

        

        SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();

        Session session = sessionFactory.getCurrentSession();

        session.beginTransaction();

        session.save(s);

        session.getTransaction().commit(); 

    }

}

TeacherTest：

View Code

package com.bjsxt.hibernate;



import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.AnnotationConfiguration;



public class TeacherTest {

    public static void main(String[] args) {

        Teacher t = new Teacher();

        t.setId(1);

        t.setName("t1");

        t.setTitle("middle");

        

        SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();

        Session session = sessionFactory.getCurrentSession();

        session.beginTransaction();

        session.save(t);

        session.getTransaction().commit();

    }

}

效果：

1.

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