private Integer id;
private String username;
private int balance;

private Integer id;
private String bookName;
private String isbn;//书号码
private int price;
private int stock;//书的库存数量

<hibernate-mapping><class name="com.atguigu.springhibernate.entities.Account" table="ACCOUNTS">//name,为，类中属性名，type为属性的类型，<column name..>为数据库中表的属性，下边是主键的生成方式<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>

<hibernate-mapping><class name="com.atguigu.springhibernate.entities.Book" table="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>

<hibernate-configuration><session-factory><!-- hibernate的配置文件 --><!-- 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二级缓存的配置 --></session-factory>
</hibernate-configuration>

package com.atguigu.springhibernate.dao;import java.util.List;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 - 1public void updateBookStork(String isbn);//更新用户的账户余额: 使 username 的 balance - pricepublic void updateUserAccount(String username,int price);//购买批量的书籍，更新用户的余额public int updateBatch(String username,List<String> isbns);
}

package com.atguigu.springhibernate.dao.impl;import java.util.List;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.springhibernate.dao.BookShopDao;
import com.atguigu.springhibernate.exceptions.BookStockException;
import com.atguigu.springhibernate.exceptions.UserAccountException;@Repository
public class BookShopDaoImpl implements BookShopDao{@Autowiredprivate SessionFactory sessionFactory;//获取和当前线程绑定的 Session.private Session getSession(){return sessionFactory.getCurrentSession();}/** hql是面向对象的，其表名为该表所映射的类名，即表名首字母大写* *///根据书号获取书的单价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();}//更新数的库存. 使书号对应的库存 - 1public void updateBookStork(String isbn) {//验证书的库存是否充足.String hql2="select b.stock from Book b where isbn=?";int stock= (Integer) getSession().createQuery(hql2).setString(0, isbn).uniqueResult();if(stock==0){System.out.println("该书的库存不足!!!");throw new BookStockException("该书的库存不足！！！");}String hql="update Book b set b.stock=b.stock-1 where b.isbn=?";getSession().createQuery(hql).setString(0, isbn).executeUpdate();}//更新用户的账户余额: 使 username 的 balance - pricepublic void updateUserAccount(String username, int price) {//首先，验证余额是否足够String hql2="select a.balance from Account a where a.username=?";int balance=(Integer) getSession().createQuery(hql2).setString(0, username).uniqueResult();if(balance<price){//System.out.println("账户的余额不足了!!!");throw new UserAccountException("账户余额不足了!!!!");}String hql="update Account a set a.balance=a.balance-? where username=?";getSession().createQuery(hql).setInteger(0, price).setString(1, username).executeUpdate();}public int updateBatch(String username, List<String> isbns) {//批量购买，首先验证余额是否足够//购买的所有书籍的总钱数int money=0;String hql2="select b.price from Book b where b.isbn=?";for(String isbn:isbns){money+=(Integer) getSession().createQuery(hql2).setString(0, isbn).uniqueResult();}//用户的账户余额String hql="select a.balance from Account a where a.username=?";int balance=(Integer) getSession().createQuery(hql).setString(0, username).uniqueResult();if(money>balance){throw new UserAccountException("余额不足，不能购买全部书籍");}return 0;}}

package com.atguigu.springhibernate.service;import java.util.List;public interface Cashier {public void checkout(String username,List<String> isbns);}

package com.atguigu.springhibernate.service;public interface BookShopService {public void purchase(String username,String isbn);}

package com.atguigu.springhibernate.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.atguigu.springhibernate.dao.BookShopDao;
import com.atguigu.springhibernate.service.Cashier;@Service
public class CashierImpl implements Cashier {@Autowiredprivate BookShopDao bookShopDao;//批量购买书籍public void checkout(String username, List<String> isbns) {//购买批量的书籍
        bookShopDao.updateBatch(username, isbns);}}

package com.atguigu.springhibernate.service.impl;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.atguigu.springhibernate.dao.BookShopDao;
import com.atguigu.springhibernate.service.BookShopService;@Service
public class BookShopServiceImpl implements BookShopService {@Autowiredprivate 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*/public void purchase(String username, String isbn) {//由书的编号，的出书的价格int price = bookShopDao.findBookPriceByIsbn(isbn);//由书的编号，更新书的库存
        bookShopDao.updateBookStork(isbn);//更新该用户的账户余额
        bookShopDao.updateUserAccount(username, price);}}

jdbc.user=root
jdbc.password=lxn123
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///spring_hibernate

jdbc.initPoolSize=5
jdbc.maxPoolSize=10

    <!-- 配置自动扫描的包，及其子包,基于注解的bean配置 --><context:component-scan base-package="com.atguigu.springhibernate"></context:component-scan><!-- 配置数据源 --><!-- 导入资源文件 ，根目录（src）下的文件--><context:property-placeholder location="classpath:jdbc.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><!-- 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/springhibernate/entities/*.hbm.xml"></property></bean><!-- 配置 Spring 的声明事务 --><!-- 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"/><!-- 设置事物的传播行为，设置为新事物 --><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.springhibernate.service.*.*(..))" id="txPointcut"/><!-- 把切点和事物属性关联起来 --><aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/></aop:config>

package com.atguigu.springhibernate.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.springhibernate.service.BookShopService;
import com.atguigu.springhibernate.service.Cashier;public class SpringHibernateTest {private static ApplicationContext ctx=null;private static BookShopService bookShopService=null;private static Cashier cashier=null;{ctx=new ClassPathXmlApplicationContext("applicationContext.xml");bookShopService=ctx.getBean(BookShopService.class);cashier=ctx.getBean(Cashier.class);}@Testpublic void testCashier(){cashier.checkout("AAA", Arrays.asList("1001","1002"));}@Testpublic void testBookShopService() {bookShopService.purchase("AAA", "1001");}//测试数据库连接池是否连接成功public void jdbcConnection() throws SQLException{DataSource dataSource=(DataSource) ctx.getBean("dataSource");System.out.println(dataSource.getConnection());}}

package com.atguigu.springhibernate.exceptions;public class UserAccountException extends RuntimeException{private static final long serialVersionUID = 1L;public UserAccountException() {super();}public UserAccountException(String message, Throwable cause,boolean enableSuppression, boolean writableStackTrace) {super(message, cause, enableSuppression, writableStackTrace);}public UserAccountException(String message, Throwable cause) {super(message, cause);}public UserAccountException(String message) {super(message);}public UserAccountException(Throwable cause) {super(cause);}}

package com.atguigu.springhibernate.exceptions;public class BookStockException extends RuntimeException{private static final long serialVersionUID = 1L;public BookStockException() {super();}public BookStockException(String message, Throwable cause,boolean enableSuppression, boolean writableStackTrace) {super(message, cause, enableSuppression, writableStackTrace);}public BookStockException(String message, Throwable cause) {super(message, cause);}public BookStockException(String message) {super(message);}public BookStockException(Throwable cause) {super(cause);}}