java数据访问(4)：hibernate

        <!-- 导入org.hibernate jar包 -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.1.4.Final</version>
        </dependency>

        <!-- 导入Mysql数据库链接jar包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>

<?xml version=‘1.0‘ encoding=‘UTF-8‘?>
<!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>
        <property name="dialect">org.hibernate.dialect.MySQLDialect    </property>
        <property name="connection.url">jdbc:mysql://localhost:3306/test2</property>
        <property name="connection.username">root</property>
        <property name="connection.password">Sa1234$</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="myeclipse.connection.profile">mysql</property>
         <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>
        
        <mapping resource="user.hbm.xml" />

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

package my;

public class User implements java.io.Serializable {

    // Fields

    private Long userId;
    private String userName;
    private String password;
    private String comment;

    // Constructors
    public User() {
    }

    
    // Property accessors
    public Long getUserId() {
        return this.userId;
    }

    public void setUserId(Long userId) {
        this.userId = userId;
    }

    public String getUserName() {
        return this.userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return this.password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getComment() {
        return this.comment;
    }

    public void setComment(String comment) {
        this.comment = comment;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name="my.User" table="user" catalog="test2">
        <id name="userId" type="java.lang.Long">
            <column name="userId" />
            <generator class="identity" />
        </id>
        <property name="userName" type="java.lang.String">
            <column name="userName" length="30" not-null="true" />
        </property>
        <property name="password" type="java.lang.String">
            <column name="password" length="80" not-null="true" />
        </property>
        <property name="comment" type="java.lang.String">
            <column name="comment" length="250" />
        </property>
    </class>
</hibernate-mapping>

package my.hibernate2;

import my.User;

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

public class App {
    public static void main(String[] args) {

        Configuration config = new Configuration();
        SessionFactory sessionFactory = config.configure()
                .buildSessionFactory(); // 默认读取hibernate.cfg.xml
        Session session = sessionFactory.openSession();

        Transaction transaction = session.beginTransaction();

        User user = new User();
        user.setUserName("hibernate nuam");
        user.setPassword("h111");

        session.save(user);

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