hibernate4.x(一)——hibernate入门之helloworld

一、首先建一个java工程，添加所需的包

二、编写hibernate.cfg.xml配置文件

<?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>
    
     <!-- Hibernate 连接数据库的基本信息 -->
     <property name="connection.username">root</property>
     <property name="connection.password">root</property>
     <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
     <property name="connection.url">jdbc:mysql:///hibernate</property>
<!-- Hibernate 的基本配置 -->
<!-- Hibernate 使用的数据库方言 -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- 运行时是否打印 SQL -->
     <property name="show_sql">true</property>
    
     <!-- 运行时是否格式化 SQL -->
     <property name="format_sql">true</property>
    
     <!-- 生成数据表的策略 -->
     <property name="hbm2ddl.auto">update</property>
    
    
     <!-- 需要关联的 hibernate 映射文件 .hbm.xml -->
     <mapping resource="com/hibernate/entities/News.hbm.xml"/>
    
    </session-factory>
</hibernate-configuration>

三、建一个实体类News.class

package com.hibernate.entities;
import java.util.Date;
public class News {
private Integer id;
private String title;
private String author;
private Date date;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public News(String title, String author, Date date) {
super();
this.title = title;
this.author = author;
this.date = date;
}
public News() {
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "News [id=" + id + ", title=" + title + ", author=" + author
+ ", date=" + date + "]";
}
}

四、编写实体类News.xml的映射文件News.hbm.xml

<?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 package="com.hibernate.entities">
    <class name="News" table="NEWS" dynamic-update="true">
    
        <id name="id" type="java.lang.Integer">
            <column name="ID" />
            <generator class="native" />
        </id>
        
        <property name="title" type="java.lang.String">
         <column name="TITLE"/>
        </property>
        
        <property name="author" type="java.lang.String">
            <column name="AUTHOR" />
        </property>
        
        <property name="date" type="java.sql.Date">
            <column name="DATE" />
        </property>
        
    </class>
    
</hibernate-mapping>

五、编写测试类

package com.hibernate.test;
import java.util.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.Test;
import com.hibernate.entities.News;
public class HibernateTest {
@Test
public void test() {
System.out.println("test...");
//1. 创建一个 SessionFactory 对象
SessionFactory sessionFactory = null;
//1). 创建 Configuration 对象: 对应 hibernate 的基本配置信息和 对象关系映射信息
Configuration configuration = new Configuration().configure();
//4.0 之前这样创建
// sessionFactory = configuration.buildSessionFactory();
//2). 创建一个 ServiceRegistry 对象: hibernate 4.x 新添加的对象
//hibernate 的任何配置和服务都需要在该对象中注册后才能有效.
ServiceRegistry serviceRegistry = 
new ServiceRegistryBuilder().applySettings(configuration.getProperties())
                            .buildServiceRegistry();
//3).
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
//2. 创建一个 Session 对象
Session session = sessionFactory.openSession();
//3. 开启事务
Transaction transaction = session.beginTransaction();
//4. 执行保存操作
News news = new News("hibernate", "jack", new Date(new java.util.Date().getTime()));
session.save(news);
//5. 提交事务 
transaction.commit();
//6. 关闭 Session
session.close();
//7. 关闭 SessionFactory 对象
sessionFactory.close();
}
}

一、首先建一个java工程，添加所需的包

二、编写hibernate.cfg.xml配置文件

<?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>
    
     <!-- Hibernate 连接数据库的基本信息 -->
     <property name="connection.username">root</property>
     <property name="connection.password">root</property>
     <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
     <property name="connection.url">jdbc:mysql:///hibernate</property>
<!-- Hibernate 的基本配置 -->
<!-- Hibernate 使用的数据库方言 -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- 运行时是否打印 SQL -->
     <property name="show_sql">true</property>
    
     <!-- 运行时是否格式化 SQL -->
     <property name="format_sql">true</property>
    
     <!-- 生成数据表的策略 -->
     <property name="hbm2ddl.auto">update</property>
    
    
     <!-- 需要关联的 hibernate 映射文件 .hbm.xml -->
     <mapping resource="com/hibernate/entities/News.hbm.xml"/>
    
    </session-factory>
</hibernate-configuration>

三、建一个实体类News.class

package com.hibernate.entities;
import java.util.Date;
public class News {
private Integer id;
private String title;
private String author;
private Date date;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public News(String title, String author, Date date) {
super();
this.title = title;
this.author = author;
this.date = date;
}
public News() {
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "News [id=" + id + ", title=" + title + ", author=" + author
+ ", date=" + date + "]";
}
}

四、编写实体类News.xml的映射文件News.hbm.xml

<?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 package="com.hibernate.entities">
    <class name="News" table="NEWS" dynamic-update="true">
    
        <id name="id" type="java.lang.Integer">
            <column name="ID" />
            <generator class="native" />
        </id>
        
        <property name="title" type="java.lang.String">
         <column name="TITLE"/>
        </property>
        
        <property name="author" type="java.lang.String">
            <column name="AUTHOR" />
        </property>
        
        <property name="date" type="java.sql.Date">
            <column name="DATE" />
        </property>
        
    </class>
    
</hibernate-mapping>

五、编写测试类

package com.hibernate.test;
import java.util.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.Test;
import com.hibernate.entities.News;
public class HibernateTest {
@Test
public void test() {
System.out.println("test...");
//1. 创建一个 SessionFactory 对象
SessionFactory sessionFactory = null;
//1). 创建 Configuration 对象: 对应 hibernate 的基本配置信息和 对象关系映射信息
Configuration configuration = new Configuration().configure();
//4.0 之前这样创建
// sessionFactory = configuration.buildSessionFactory();
//2). 创建一个 ServiceRegistry 对象: hibernate 4.x 新添加的对象
//hibernate 的任何配置和服务都需要在该对象中注册后才能有效.
ServiceRegistry serviceRegistry = 
new ServiceRegistryBuilder().applySettings(configuration.getProperties())
                            .buildServiceRegistry();
//3).
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
//2. 创建一个 Session 对象
Session session = sessionFactory.openSession();
//3. 开启事务
Transaction transaction = session.beginTransaction();
//4. 执行保存操作
News news = new News("hibernate", "jack", new Date(new java.util.Date().getTime()));
session.save(news);
//5. 提交事务 
transaction.commit();
//6. 关闭 Session
session.close();
//7. 关闭 SessionFactory 对象
sessionFactory.close();
}
}