总体流程
1. Spring 整合 Hibernate 整合什么 ?
1). 有 IOC 容器来管理 Hibernate 的 SessionFactory
2). 让 Hibernate 使用上 Spring 的声明式事务
2. 整合步骤:
1). 加入 hibernate
①. jar 包
②. 添加 hibernate 的配置文件: hibernate.cfg.xml
③. 编写了持久化类对应的 .hbm.xml 文件。
2). 加入 Spring
①. jar 包
②. 加入 Spring 的配置文件
3). 整合.
3. 编写代码
配置文件
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="com.atguigu.spring.hibernate"></context:component-scan>
<!-- 配置数据源 -->
<!-- 导入资源文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
</bean>
<!-- 配置 Hibernate 的 SessionFactory 实例: 通过 Spring 提供的 LocalSessionFactoryBean 进行配置 -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<!-- 配置数据源属性 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 配置 hibernate 配置文件的位置及名称 -->
<!--
<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
-->
<!-- 使用 hibernateProperties 属相来配置 Hibernate 原生的属性 -->
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<!-- 配置 hibernate 映射文件的位置及名称, 可以使用通配符 -->
<property name="mappingLocations"
value="classpath:com/atguigu/spring/hibernate/entities/*.hbm.xml"></property>
</bean>
<!-- 配置 Spring 的声明式事务 -->
<!-- 1. 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 2. 配置事务属性, 需要事务管理器 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="purchase" propagation="REQUIRES_NEW"/>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<!-- 3. 配置事务切点, 并把切点和事务属性关联起来 -->
<aop:config>
<aop:pointcut expression="execution(* com.atguigu.spring.hibernate.service.*.*(..))"
id="txPointcut"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
</aop:config>
</beans>
db.properties
jdbc.user=root
jdbc.password=1230
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///spring7
jdbc.initPoolSize=5
jdbc.maxPoolSize=10
#...
hibernate.cfg.xml
<?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 hibernate 的基本属性 -->
<!-- 1. 数据源需配置到 IOC 容器中, 所以在此处不再需要配置数据源 -->
<!-- 2. 关联的 .hbm.xml 也在 IOC 容器配置 SessionFactory 实例时在进行配置 -->
<!-- 3. 配置 hibernate 的基本属性: 方言, SQL 显示及格式化, 生成数据表的策略以及二级缓存等. -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- 配置 hibernate 二级缓存相关的属性. -->
</session-factory>
</hibernate-configuration>
beans
package com.atguigu.spring.hibernate.entities;
public class Book {
private Integer id;
private String bookName;
private String isbn;
private int price;
private int stock;
//get set
}
<?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>
<class name="com.atguigu.spring.hibernate.entities.Book" table="SH_BOOK">
<id name="id" type="java.lang.Integer">
<column name="ID" />
<generator class="native" />
</id>
<property name="bookName" type="java.lang.String">
<column name="BOOK_NAME" />
</property>
<property name="isbn" type="java.lang.String">
<column name="ISBN" />
</property>
<property name="price" type="int">
<column name="PRICE" />
</property>
<property name="stock" type="int">
<column name="STOCK" />
</property>
</class>
</hibernate-mapping>
package com.atguigu.spring.hibernate.entities;
public class Account {
private Integer id;
private String username;
private int balance;
//get set
}
<?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>
<class name="com.atguigu.spring.hibernate.entities.Account" table="SH_ACCOUNT">
<id name="id" type="java.lang.Integer">
<column name="ID" />
<generator class="native" />
</id>
<property name="username" type="java.lang.String">
<column name="USERNAME" />
</property>
<property name="balance" type="int">
<column name="BALANCE" />
</property>
</class>
</hibernate-mapping>
dao
package com.atguigu.spring.hibernate.dao;
public interface BookShopDao {
//根据书号获取书的单价
public int findBookPriceByIsbn(String isbn);
//更新数的库存. 使书号对应的库存 - 1
public void updateBookStock(String isbn);
//更新用户的账户余额: 使 username 的 balance - price
public void updateUserAccount(String username, int price);
}
impl
package com.atguigu.spring.hibernate.dao.impl;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.atguigu.spring.hibernate.dao.BookShopDao;
import com.atguigu.spring.hibernate.exceptions.BookStockException;
import com.atguigu.spring.hibernate.exceptions.UserAccountException;
@Repository
public class BookShopDaoImpl implements BookShopDao {
@Autowired
private SessionFactory sessionFactory;
//不推荐使用 HibernateTemplate 和 HibernateDaoSupport
//因为这样会导致 Dao 和 Spring 的 API 进行耦合
//可以移植性变差
// private HibernateTemplate hibernateTemplate;
//获取和当前线程绑定的 Session.
private Session getSession(){
return sessionFactory.getCurrentSession();
}
@Override
public int findBookPriceByIsbn(String isbn) {
String hql = "SELECT b.price FROM Book b WHERE b.isbn = ?";
Query query = getSession().createQuery(hql).setString(0, isbn);
return (Integer)query.uniqueResult();
}
@Override
public void updateBookStock(String isbn) {
//验证书的库存是否充足.
String hql2 = "SELECT b.stock FROM Book b WHERE b.isbn = ?";
int stock = (int) getSession().createQuery(hql2).setString(0, isbn).uniqueResult();
if(stock == 0){
throw new BookStockException("库存不足!");
}
String hql = "UPDATE Book b SET b.stock = b.stock - 1 WHERE b.isbn = ?";
getSession().createQuery(hql).setString(0, isbn).executeUpdate();
}
@Override
public void updateUserAccount(String username, int price) {
//验证余额是否足够
String hql2 = "SELECT a.balance FROM Account a WHERE a.username = ?";
int balance = (int) getSession().createQuery(hql2).setString(0, username).uniqueResult();
if(balance < price){
throw new UserAccountException("余额不足!");
}
String hql = "UPDATE Account a SET a.balance = a.balance - ? WHERE a.username = ?";
getSession().createQuery(hql).setInteger(0, price).setString(1, username).executeUpdate();
}
}
service
package com.atguigu.spring.hibernate.service;
public interface BookShopService {
public void purchase(String username, String isbn);
}
package com.atguigu.spring.hibernate.service;
import java.util.List;
public interface Cashier {
public void checkout(String username, List<String> isbns);
}
impl
package com.atguigu.spring.hibernate.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.atguigu.spring.hibernate.dao.BookShopDao;
import com.atguigu.spring.hibernate.service.BookShopService;
@Service
public class BookShopServiceImpl implements BookShopService {
@Autowired
private BookShopDao bookShopDao;
/**
* Spring hibernate 事务的流程
* 1. 在方法开始之前
* ①. 获取 Session
* ②. 把 Session 和当前线程绑定, 这样就可以在 Dao 中使用 SessionFactory 的
* getCurrentSession() 方法来获取 Session 了
* ③. 开启事务
*
* 2. 若方法正常结束, 即没有出现异常, 则
* ①. 提交事务
* ②. 使和当前线程绑定的 Session 解除绑定
* ③. 关闭 Session
*
* 3. 若方法出现异常, 则:
* ①. 回滚事务
* ②. 使和当前线程绑定的 Session 解除绑定
* ③. 关闭 Session
*/
@Override
public void purchase(String username, String isbn) {
int price = bookShopDao.findBookPriceByIsbn(isbn);
bookShopDao.updateBookStock(isbn);
bookShopDao.updateUserAccount(username, price);
}
}
package com.atguigu.spring.hibernate.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.atguigu.spring.hibernate.service.BookShopService;
import com.atguigu.spring.hibernate.service.Cashier;
@Service
public class CashierImpl implements Cashier{
@Autowired
private BookShopService bookShopService;
@Override
public void checkout(String username, List<String> isbns) {
for(String isbn:isbns){
bookShopService.purchase(username, isbn);
}
}
}
exception
package com.atguigu.spring.hibernate.exceptions;
public class UserAccountException extends RuntimeException{
/**
*
*/
private static final long serialVersionUID = 1L;
public UserAccountException() {
super();
// TODO Auto-generated constructor stub
}
public UserAccountException(String message, Throwable cause,
boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
// TODO Auto-generated constructor stub
}
public UserAccountException(String message, Throwable cause) {
super(message, cause);
// TODO Auto-generated constructor stub
}
public UserAccountException(String message) {
super(message);
// TODO Auto-generated constructor stub
}
public UserAccountException(Throwable cause) {
super(cause);
// TODO Auto-generated constructor stub
}
}
package com.atguigu.spring.hibernate.exceptions;
public class BookStockException extends RuntimeException{
/**
*
*/
private static final long serialVersionUID = 1L;
public BookStockException() {
super();
// TODO Auto-generated constructor stub
}
public BookStockException(String message, Throwable cause,
boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
// TODO Auto-generated constructor stub
}
public BookStockException(String message, Throwable cause) {
super(message, cause);
// TODO Auto-generated constructor stub
}
public BookStockException(String message) {
super(message);
// TODO Auto-generated constructor stub
}
public BookStockException(Throwable cause) {
super(cause);
// TODO Auto-generated constructor stub
}
}
test
package com.atguigu.spring.hibernate.test;
import java.sql.SQLException;
import java.util.Arrays;
import javax.sql.DataSource;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.atguigu.spring.hibernate.service.BookShopService;
import com.atguigu.spring.hibernate.service.Cashier;
public class SpringHibernateTest {
private ApplicationContext ctx = null;
private BookShopService bookShopService = null;
private Cashier cashier = null;
{
ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
bookShopService = ctx.getBean(BookShopService.class);
cashier = ctx.getBean(Cashier.class);
}
@Test
public void testCashier(){
cashier.checkout("aa", Arrays.asList("1001","1002"));
}
@Test
public void testBookShopService(){
bookShopService.purchase("aa", "1001");
}
@Test
public void testDataSource() throws SQLException {
DataSource dataSource = ctx.getBean(DataSource.class);
System.out.println(dataSource.getConnection());
}
}