hibernate

 下载hibernate jar包

https://sourceforge.net/projects/hibernate/files/

antlr-2.7.7.jar
classmate-1.3.0.jar
dom4j-1.6.1.jar
hibernate-commons-annotations-5.0.1.Final.jar
hibernate-core-5.2.11.Final.jar
hibernate-jpa-2.1-api-1.0.0.Final.jar
javassist-3.20.0-GA.jar
jboss-logging-3.3.0.Final.jar
jboss-transaction-api_1.2_spec-1.0.0.Final.jar
lucene-core-5.5.4.jar
lucene-queryparser-5.5.4.jar
xml-apis-1.3.03.jar

另外加入数据库驱动jar包

mysql-connector-java-5.1.45-bin.jar

 

创建Tesy工程

创建持久化对象：User.java

package com.hust.dong;

public class User {
    private int id;
    private String name;

    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;
    }

    @Override
    public String toString() {
        return "[User: id=" + id + ", name=" + name + "]";
    }
}

创建对象-关系映射文件：/src/com/hust/dong/User.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

    
<hibernate-mapping package="com.hust.dong">
    <class name="User" table="t_user">
        <id name="id" type="int" column="id">
            <generator class="native"/>
        </id>
        <property name="name" type="string" column="name" />
    </class>
</hibernate-mapping>

创建Hibernate配置文件：hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <!-- 1. 配置数据库信息 -->
        <!-- 方言(连接的数据库类型) -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.url">jdbc:mysql:///cm_hibernate</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.username">root</property>
        <property name="connection.password">123456</property>

        <!-- 2. 其他配置 -->
        <!-- 显示生成的SQL语句 -->
        <property name="hibernate.show_sql">true</property>

        <!-- 3. 导入映射文件 -->
        <mapping resource="com/hust/dong/User.hbm.xml" />
    </session-factory>
</hibernate-configuration>

创建测试用例

package com.hust.dong;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.Test;

public class App {

    private static SessionFactory sessionFactory;

    static {
        Configuration cfg = new Configuration();
        cfg.configure("hibernate.cfg.xml"); // 读取指定的主配置文件
        sessionFactory = cfg.buildSessionFactory(); // 根据配置生成Session工厂
    }

    @Test
    public void testSave() {
        User user = new User();
        user.setName("zhangsan");

        // 保存
        Session session = sessionFactory.openSession(); // 打开一个新的Session
        Transaction tx = session.beginTransaction(); // 开启事务

        session.save(user);

        tx.commit(); // 提交事务
        session.close(); // 关闭Session，释放资源(不一定是真正的关闭)
    }

    @Test
    public void testGet() {
        Session session = sessionFactory.openSession();
        Transaction tx = session.beginTransaction();

        User user = (User) session.get(User.class, 4); //
        System.out.println(user);

        tx.commit();
        session.close();
    }
}

mysql -u root -p
create database cm_hibernate default character set utf8;
use cm_hibernate;
create table t_user( id int primary key auto_increment, name varchar(20) );

运行即可

 http://blog.csdn.net/yerenyuan_pku/article/details/52733275