Spring4.X整合Hibernate

一、Spring整合Hibernate,整合什麼?

① 由Spring的IOC容器管理Hibernate的SessionFactory
② 讓Hibernate使用上Spring的聲明式事務
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二、整合步驟

① 加入Hibernate
 i、jar包
 ii、添加hibernate配置文件hibernate.cfg.xml文件
 iii、編寫了持久化對應的.hbm.xml文件java

注:mysql

可使用Hibernate插件進行配置文件的自動生成,而後稍做修改便可(見參考資料)。
② 加入Springgit

 i、jar包
 ii、加入Spring的配置文件spring

    a、配置數據源sql

    db.properties配置express

jdbc.user=root
jdbc.password=liuhao
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///spring7

jdbc.initPoolSize=5
jdbc.maxPoolSize=10

 applicationContext.xml配置緩存

<!-- 配置數據源 -->
	<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>

    b、配置Hibernate的SessionFactory實例session

    hibernate.cfg.xml配置app

<?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的基本屬性 -->
		<!-- 一、數據源需配置到Spring IOC容器中,因此此處無需配置數據源 -->
		<!-- 二、關聯的.hbm.xml也在IOC容器配置SessionFactory實例是再進行配置 -->
		<!-- 三、能夠配置Hibernate的基本屬性,如方言、SQL顯示及格式化,生成數據表的策略及二級緩存等 -->
		<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的二級緩存屬性相關 -->
	</session-factory>
</hibernate-configuration>

applicationContext.xml配置 

<!-- 配置Hibernate的SessionFactory實例:經過Spring提供的LocalSessionFactoryBean進行配置 -->
	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<!-- 配置數據源屬性 -->
		<property name="dataSource" ref="dataSource"></property>
		
		<!-- 配置hibernate配置文件的位置及名稱 -->
		<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
		
		<!-- 配置hibernate映射文件的位置及名稱,可使用通配符 -->
		<property name="mappingLocations" value="classpath:com/lty/spring/hibernate/entity/*.hbm.xml"></property>
	</bean>

      c、配置Spring的聲明式事務(applicationContext.xml配置)

<!-- 配置Spring的聲明式事務 -->
	<!-- 一、配置事務管理器 -->
	<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	
	<!-- 二、配置事務屬性,須要事務管理器 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="get*" read-only="true"/>
			<tx:method name="*"/>
		</tx:attributes>
	</tx:advice>
	
	<!-- 三、配置事務切點,並將切點與事務屬性關聯起來 -->
	<aop:config>
		<aop:pointcut expression="execution(* com.lty.spring.hibernate.service.*.*(..))" id="txPointcut"/>
		<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
	</aop:config>

③ 整合

i、編寫代碼

三、代碼測試

① 買isbn爲「1001」的書時,爲何去掉applicationContext.xml切點與事務關聯配置後,預期庫存-1,餘額不變沒法測試?

<!-- 三、配置事務切點,並將切點與事務屬性關聯起來 -->
	<aop:config>
		<aop:pointcut expression="execution(* com.lty.spring.hibernate.service.*.*(..))" id="txPointcut"/>
		<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
	</aop:config>
@Test
	public void testBookShopService(){
		bookShopService.purchase("aa", "1001");
	}

緣由:

這是由於去掉這部分配置後,session將沒法獲取(Hibernate與Spring整合的Session是創建在Spring事務基礎之上的):

org.hibernate.HibernateException: No Session found for current thread
	at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:106)
	at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:988)
	at com.lty.spring.hibernate.dao.impl.BookShopDaoImpl.getSession(BookShopDaoImpl.java:27)
	at com.lty.spring.hibernate.dao.impl.BookShopDaoImpl.findBookPriceByIsbn(BookShopDaoImpl.java:33)
	at com.lty.spring.hibernate.service.impl.BookShopServiceImpl.purchase(BookShopServiceImpl.java:37)
	at com.lty.spring.hibernate.test.SpringHibernateTest.testBookShopService(SpringHibernateTest.java:36)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

沒法測試詳細緣由說明: 

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

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

import com.lty.spring.hibernate.dao.BookShopDao;
import com.lty.spring.hibernate.service.BookShopService;

@Service
public class BookShopServiceImpl implements BookShopService {

	@Autowired
	private BookShopDao bookShopDao;
	
	/***
	 * 
	 * Spring Hibernate 事務的流程
	 * 一、在方法(spring事務)開始以前
	 * ① 獲取session
	 * ② 將session和當前線程綁定,這樣就能夠在Dao中使用SessionFactory的
	 * getCurrentSession()方法來獲取Session了
	 * ③ 開啓事務
	 * 
	 * 二、若方法正常結束,即未出現異常,則
	 * ① 提交事務
	 * ② 將Session與當前線程解除綁定
	 * ③ 關閉Session
	 * 
	 * 三、若方法出現異常,則
	 * ① 回滾事務
	 * ② 將Session與當前線程解除綁定
	 * ③ 關閉Session
	 * 
	 */
	@Override
	public void purchase(String username, String isbn) {
		int price = bookShopDao.findBookPriceByIsbn(isbn);
		bookShopDao.updateBookStock(isbn);
		bookShopDao.updateUserAccount(username, price);
	}

}

② checkout方法測試事務的傳播行爲(容許買"1001"一本成功):

<!-- 二、配置事務屬性,須要事務管理器 -->
	<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>

四、附關鍵文件完整代碼

① 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/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
	<context:component-scan base-package="com.lty.spring.hibernate"></context:component-scan>

	<!-- 配置數據源 -->
	<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實例:經過Spring提供的LocalSessionFactoryBean進行配置 -->
	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<!-- 配置數據源屬性 -->
		<property name="dataSource" ref="dataSource"></property>
		
		<!-- 配置hibernate配置文件的位置及名稱 -->
		<!-- <property name="configLocation" value="classpath:hibernate.cfg.xml"></property> -->
		
		<!-- 使用hibernateProperties屬性來配置Hibernate原生的屬性 (不推薦)-->
		<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稱,可使用通配符 -->
		<property name="mappingLocations" value="classpath:com/lty/spring/hibernate/entity/*.hbm.xml"></property>
	</bean>
	
	<!-- 配置Spring的聲明式事務 -->
	<!-- 一、配置事務管理器 -->
	<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	
	<!-- 二、配置事務屬性,須要事務管理器 -->
	<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>
	
	<!-- 三、配置事務切點,並將切點與事務屬性關聯起來 -->
	<aop:config>
		<aop:pointcut expression="execution(* com.lty.spring.hibernate.service.*.*(..))" id="txPointcut"/>
		<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
	</aop:config>
</beans>

② SpringHibernateTest

package com.lty.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.lty.spring.hibernate.service.BookShopService;
import com.lty.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 testDataSource() throws SQLException{
		DataSource dataSource = ctx.getBean(DataSource.class);
		System.out.println(dataSource.getConnection());
	}
	
	@Test
	public void testBookShopService(){
		bookShopService.purchase("aa", "1001");
	}
	
	@Test
	public void testCashier(){
		cashier.checkout("aa", Arrays.asList("1001","1002"));
	}
}

詳細代碼參考:碼雲spring-5

 

參考資料

一、如何在Eclipse上安裝hibernate Tool?

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