Spring4.* 中整合 Hibernate

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

spring-aop-4.0.0.RELEASE.jar
spring-aspects-4.0.4.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
commons-logging-1.2.jar

②. 加入 Spring 的配置文件

3). 整合.

3. 编写代码

整合工程目录结构如下图所示：

引用到的jar包如下：

spring的配置文件：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>

hibernate配置文件：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>

数据库配置文件：db.properties

 jdbc.user=root
 jdbc.password=123456
 jdbc.driverClass=com.mysql.jdbc.Driver
 jdbc.jdbcUrl=jdbc:mysql:///spring

 jdbc.initPoolSize=5
 jdbc.maxPoolSize=10
 #...

DAO层接口文件：BookShopDao

 package com.lltse.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);
 }

DAO层接口实现类：

Entity:Account

 package com.lltse.spring.hibernate.entities;

 public class Account {

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

     public Integer getId() {
         return id;
     }

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

     public String getUsername() {
         return username;
     }

     public void setUsername(String username) {
         this.username = username;
     }

     public int getBalance() {
         return balance;
     }

     public void setBalance(int balance) {
         this.balance = balance;
     }

 }

Book

 package com.lltse.spring.hibernate.entities;

 public class Book {

     private Integer id;
     private String bookName;
     private String isbn;
     private int price;
     private int stock;

     public Integer getId() {
         return id;
     }

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

     public String getBookName() {
         return bookName;
     }

     public void setBookName(String bookName) {
         this.bookName = bookName;
     }

     public String getIsbn() {
         return isbn;
     }

     public void setIsbn(String isbn) {
         this.isbn = isbn;
     }

     public int getPrice() {
         return price;
     }

     public void setPrice(int price) {
         this.price = price;
     }

     public int getStock() {
         return stock;
     }

     public void setStock(int stock) {
         this.stock = stock;
     }

 }

hibernate对实体的映射文件：

Account.hbm.xml

 <?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.lltse.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>

Book.hbm.xml

 <?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.lltse.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>

自定义异常：

BookStockException.java

 package com.lltse.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
     }

 }

UserAccountException.java

package com.lltse.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
    }

}

service 接口：

BookShopService.java

 package com.lltse.spring.hibernate.service;

 public interface BookShopService {

     public void purchase(String username, String isbn);

 }

Cashier.java

 package com.lltse.spring.hibernate.service;

 import java.util.List;

 public interface Cashier {

     public void checkout(String username, List<String> isbns);

 }

service实现类层：

BookShopServiceImpl.java

 package com.lltse.spring.hibernate.service.impl;

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

 import com.lltse.spring.hibernate.dao.BookShopDao;
 import com.lltse.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);
     }

 }

CashierImpl.java

 package com.lltse.spring.hibernate.service.impl;

 import java.util.List;

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

 import com.lltse.spring.hibernate.service.BookShopService;
 import com.lltse.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);
         }
     }

 }

junit测试用例

SpringHibernateTest.java

 package com.lltse.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.lltse.spring.hibernate.service.BookShopService;
 import com.lltse.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());
     }

 }