Hibernate是ORM 框架，采用面向对象的方式来操作关系数据库，消除冗长的 SQL代码。
使用Hibernate4版本和MySQL数据库做测试
1.导jar包
antlr-2.7.7.jardom4j-1.6.1.jarhibernate-c3p0-4.2.4.Final.jarhibernate-commons-annotations-4.0.2.Final.jarhibernate-core-4.2.4.Final.jarhibernate-jpa-2.0-api-1.0.1.Final.jarjavassist-3.15.0-GA.jarjboss-logging-3.1.0.GA.jarjboss-transaction-api_1.1_spec-1.0.1.Final.jarmysql-connector-java-5.1.7-bin.jar2.配置hibernate.cfg.xml
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<?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>
<!-- 配置连接数据库的基本信息 -->
<property name="connection.username">root</property>
<property name="connection.password">000111</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://127.0.0.1:3306/test</property>
<!-- 配置 hibernate 的基本信息 -->
<!-- hibernate 所使用的数据库方言 -->
<property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<!-- 执行操作时是否在控制台打印 SQL -->
<property name="show_sql">true</property>
<!-- 是否对 SQL 进行格式化 -->
<property name="format_sql">true</property>
<!-- 指定自动生成数据表的策略 -->
<property name="hbm2ddl.auto">update</property>
<!-- 指定关联的 .hbm.xml 文件 -->
<mapping resource="com/demo/hibernate/test/News.hbm.xml"/>
</session-factory>
</hibernate-configuration>
3.编写Bean与映射文件
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package com.demo.hibernate.test;
import java.sql.Blob;
import java.util.Date;
public class News {
private Integer id;
private String title;
private String author;
private Date date;
//该属性值为： title: author
private String desc;
//大文本
private String content;
//二进制数据
private Blob image;
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public Blob getImage() {
return image;
}
public void setImage(Blob image) {
this.image = image;
}
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 String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public News(String title, String author, Date date) {
super();
this.title = title;
this.author = author;
this.date = date;
}
public News() {
}
@Override
public String toString() {
return "News [id=" + id + ", title=" + title + ", author=" + author
+ ", date=" + date + "]";
}
}
News.hbm.xml
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<?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.demo.hibernate.test">
<class name="News" table="NEWS" dynamic-insert="true">
<id name="id" type="java.lang.Integer">
<column name="ID" />
<!-- 指定主键的生成方式, native: 使用数据库本地方式 -->
<generator class="native" />
</id>
<property name="title" not-null="true" unique="true"
index="news_index" length="50"
type="java.lang.String" column="TITLE" >
</property>
<property name="author" type="java.lang.String"
index="news_index">
<column name="AUTHOR" />
</property>
<property name="date" type="date">
<column name="DATE" />
</property>
<property name="desc"
formula="(SELECT concat(title, ',', author) FROM NEWS n WHERE n.id = id)"></property>
<!-- 映射大对象 -->
<!-- 若希望精确映射 SQL 类型, 可以使用 sql-type 属性. -->
<property name="content">
<column name="CONTENT" sql-type="text"></column>
</property>
<property name="image" column="PICTURE" type="blob"></property>
</class>
</hibernate-mapping>
4.测试
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package com.demo.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.After;
import org.junit.Before;
import org.junit.Test;
public class TestNews {
private SessionFactory sessionFactory;
private Session session;
private Transaction transaction;
/**
* 测试方法之前执行
*/
@Before
public void init() {
Configuration configuration = new Configuration().configure();
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties())
.buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
session = sessionFactory.openSession();
transaction = session.beginTransaction();
}
/**
* 测试方法之后执行
*/
@After
public void destroy() {
transaction.commit();
session.close();
sessionFactory.close();
}
/**
* 删除对象记录
*/
@Test
public void testDelete() {
News news = (News) session.get(News.class, 1);
session.delete(news);
System.out.println(news);
}
/**
* 修改对象记录
*/
@Test
public void testUpdate() {
News news1 = (News) session.get(News.class, 1);
news1.setContent("test");
session.update(news1);
}
/**
* 获取对象记录
*/
@Test
public void testGet() {
News news = (News) session.get(News.class, 1);
System.out.println(news);
}
/**
* 添加一条记录，主键由数据库负责
*/
@Test
public void testSave() {
News news = new News();
news.setTitle("CC");
news.setAuthor("cc");
news.setDate(new Date());
System.out.println(news);
session.save(news);
System.out.println(news);
}
}
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