Spring DAO之Hibernate

Spring与Hibernate整合

最新推荐文章于 2025-09-09 08:37:13 发布

weixin_33869377

最新推荐文章于 2025-09-09 08:37:13 发布

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文章标签： java 开发工具数据库

本文链接：https://blog.youkuaiyun.com/weixin_33869377/article/details/85203681

本文介绍Spring框架下如何使用Hibernate进行数据库操作，包括实体类定义、DAO接口及其实现，并展示了如何配置SessionFactory及HibernateTemplate。

Spring DAO之Hibernate

HibernateDaoSupport - Hibernate数据访问对象的基类。需要一个SessionFactory，同时为子类提供 HibernateTemplate。也可以选择直接通过提供一个HibernateTemplate来初始化，这样就可以重用后者的设置，例如SessionFactory， flush模式，异常翻译器（exception translator）等等。

本节主要讨论Sping对HibernateTemplate的支持。

下面是个例子：

drop table if exists user;

/*==============================================================*/
/* Table: user                                                  */
/*==============================================================*/
create table user
(
   id                   bigint AUTO_INCREMENT not null,
   name                 varchar(24),
   age                  int,
   primary key (id)
);

/**
* Created by IntelliJ IDEA. 
* User: leizhimin 
* Date: 2008-4-23 15:37:34 
* Note: Hiberante实体类
*/
public class User {
 private Integer id;
 private String name;
 private Integer age;

 public Integer getId() {
 return id;
 }

 public void setId(Integer id) {
 this.id = id;
 }

 public String getName() {
 return name;
 }

 public void setName(String name) {
 this.name = name;
 }

 public Integer getAge() {
 return age;
 }

 public void setAge(Integer age) {
 this.age = age;
 }
}

<?xml version="1.0" encoding="utf-8"?>
<!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.lavasoft.springnote.ch06_hbm_02deTx.User"
 table="user">

 <id name="id" column="id">
 <generator class="native"/>
 </id>

 <property name="name" column="name"/>

 <property name="age" column="age"/>

 </class>

</hibernate-mapping>

/**
* Created by IntelliJ IDEA. 
* User: leizhimin 
* Date: 2008-4-23 15:37:43 
* Note: DAO接口
*/
public interface IUserDAO {
public void insert(User user);
public User find(Integer id);
}

import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.HibernateTemplate;

/**
* Created by IntelliJ IDEA. 
* User: leizhimin 
* Date: 2008-4-23 15:15:55 
* Note: DAO实现
*/
public class UserDAO implements IUserDAO {
 private HibernateTemplate hibernateTemplate;

 public void setSessionFactory(SessionFactory sessionFactory) {
 this.hibernateTemplate =new HibernateTemplate(sessionFactory);
 }

 public void insert(User user) {
 hibernateTemplate.save(user);
 System.out.println("所保存的User对象的ID:"+user.getId());
 }

 public User find(Integer id) {
 User user =(User) hibernateTemplate.get(User.class, id);
 return user;
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
 <bean id="dataSource"
 class="org.springframework.jdbc.datasource.DriverManagerDataSource">
 <property name="driverClassName">
 <value>com.mysql.jdbc.Driver</value>
 </property>
 <property name="url">
 <value>jdbc:mysql://localhost:3306/springdb</value>
 </property>
 <property name="username">
 <value>root</value>
 </property>
 <property name="password">
 <value>leizhimin</value>
 </property>
 </bean>

 <bean id="sessionFactory"
 class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"
 destroy-method="close">
 <property name="dataSource">
 <ref bean="dataSource"/>
 </property>
 <property name="mappingResources">
 <list>
 <value>com/lavasoft/springnote/ch06_hbm_02proTx/User.hbm.xml</value>
 </list>
 </property>
 <property name="hibernateProperties">
 <props>
 <prop key="hibernate.dialect">
 org.hibernate.dialect.MySQLDialect
 </prop>
 </props>
 </property>
 </bean>

 <bean id="userDAO" class="com.lavasoft.springnote.ch06_hbm_02proTx.UserDAO">
 <property name="sessionFactory">
 <ref bean="sessionFactory"/>
 </property>
 </bean>
</beans>

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

/**
* Created by IntelliJ IDEA. 
* User: leizhimin 
* Date: 2008-4-23 15:16:34 
* Note: 测试类、客户端
*/
public class SpringHibernateDemo {
 public static void main(String[] args) {
 ApplicationContext context =new FileSystemXmlApplicationContext("D:\\_spring\\src\\com\\lavasoft\\springnote\\ch06_hbm_02proTx\\bean-hbm_tx.xml");

 // 建立DAO物件
 IUserDAO userDAO = (IUserDAO) context.getBean("userDAO");

 User user = new User();
 user.setName("caterpillar");
 user.setAge(new Integer(30));

 userDAO.insert(user);

 user = userDAO.find(new Integer(1));

 System.out.println("name: " + user.getName());
 }
}

运行结果：

log4j:WARN No appenders could be found for logger (org.springframework.core.CollectionFactory).
log4j:WARN Please initialize the log4j system properly.
所保存的User对象的ID:18
name: jdbctemplate

Process finished with exit code 0

以上对数据的操作都没有添加事务，后面会专门介绍。