Spring学习整合hibernate(四)

用到的Jar包

antlr-2.7.7.jar
c3p0-0.9.1.2.jar
com.springsource.net.sf.cglib-2.2.0.jar
com.springsource.org.aopalliance-1.0.0.jar
com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar
commons-logging-1.1.3.jar
dom4j-1.6.1.jar
hibernate-commons-annotations-4.0.2.Final.jar
hibernate-core-4.2.4.Final.jar
hibernate-jpa-2.0-api-1.0.1.Final.jar
javassist-3.15.0-GA.jar
jboss-logging-3.1.0.GA.jar
jboss-transaction-api_1.1_spec-1.0.1.Final.jar
mysql-connector-java-5.1.7-bin.jar
spring-aop-4.0.0.RELEASE.jar
spring-aspects-4.0.0.RELEASE.jar
spring-beans-4.0.0.RELEASE.jar
spring-context-4.0.0.RELEASE.jar
spring-core-4.0.0.RELEASE.jar
spring-expression-4.0.0.RELEASE.jar
spring-jdbc-4.0.0.RELEASE.jar
spring-orm-4.0.0.RELEASE.jar
spring-tx-4.0.0.RELEASE.jar
spring-web-4.0.0.RELEASE.jar
spring-webmvc-4.0.0.RELEASE.jar

Spring整合hibernate思路

　　先配置hibernate文件，之后配置Spring文件

hibernate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>
    
        <!-- 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>
        <!-- 自动生成数据表 -->
        <property name="hibernate.hbm2ddl.auto">update</property>
        
        <!-- 配置 hibernate 二级缓存相关的属性. -->
                
    </session-factory>
</hibernate-configuration>

spring配置文件

<?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.spring.hibernate"></context:component-scan>
    <!-- 导入资源文件 -->
    <context:property-placeholder location="classpath:db.properties" />

    <!-- 配置C3P0数据源 -->
    <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="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>

        <property name="initialPoolSize" value="${jdbc.initPoorSize}"></property>
        <property name="maxPoolSize" value="${jdbc.maxPoorSize}"></property>
    </bean>

    <!-- 配置hibernate的SessionFactory 实例：通过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的配置文件的位置以及名称 -->
        <property name="configLocations" 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/spring/hibernate/entities/*.hbm.xml"></property>
    </bean>
    
    <!-- 配饰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>
            <tx:method name="purchase" propagation="REQUIRED"></tx:method>
            <tx:method name="*"></tx:method>
        </tx:attributes>
    </tx:advice>
    
    <!-- 3.配置事务切点，并把切点和事务关联起来 -->
    <aop:config>
        <aop:pointcut expression="execution(* com.spring.hibernate.service.*.*(..))" 
        id="txPointcut"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
    </aop:config>
    
</beans>

dao层实现类

package com.spring.hibernate.daoImpl;

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.spring.hibernate.dao.BookShopDao;
import com.spring.hibernate.exception.BookStockException;
import com.spring.hibernate.exception.UserAccountException;

@Repository
public class BookShopDaoImpl implements BookShopDao {

    @Autowired
    private SessionFactory sessionFactory;
    
//    获取和当前线程绑定的线程
    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) {
        String hql2 = "select b.stock from Book b where b.isbn =?";
        Integer stock = (Integer) 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 = ?";
        Integer balance = (Integer) 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实现类

package com.spring.hibernate.service.Impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.spring.hibernate.service.BookShopService;
import com.spring.hibernate.service.CashierService;

@Service("cashierService")
public class CashierServiceImpl implements CashierService {

    @Autowired
    private BookShopService bookShopService;
    
    /**
     * Spring hibernate 事务的流程
     * 1.方法开始之前
     * a.获取session
     * b.把session和当前线程绑定，这样就可以在Dao中使用SessionFactory的getSession()方法来获取session了
     * c.开启事务
     * 
     * 2.若方法正常提交结束，没有出现异常
     * a.提交事务
     * b.使和当前绑定的session解除绑定
     * c.关闭session
     * 
     * 3.若方法出现异常
     * a.回滚事务
     * b.使和当前绑定的session解除绑定
     * c.关闭session
     */
    
    @Override
    public void checkout(String username, List<String> ibsns) {
        for(String isbn:ibsns){
            bookShopService.purchase(username, isbn);
        }
    }

}

实体类对应生成hbm.xml文件

<?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.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>

<?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.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>