spring的事務管理(核心事務管理接口:TransactionManager)


事務:事務就是一系列的動作,這些動作要么都完成,要么都不完成。

核心事務管理接口的實現類是DataSourceTransactionManager

spring事務管理的注解使用:

1.導入jar包。

 

 

2.定義一個bean事務管理類

3.在配置文件中開啟事務管理的注解驅動

spring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"

       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-4.2.xsd

              http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">

 

       <context:component-scan base-package="com.zhiyou100.kfs"></context:component-scan>

       <!-- 配置數據源(里面存放了若干個連接對象):數據庫交互的。    數據源:c3p0,druid(阿里) -->

       <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

              <property name="user" value="root"/>

              <property name="password" value="123"/>

              <property name="driverClass" value="com.mysql.jdbc.Driver"></property>

              <property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/test"></property>

       </bean>

      

       <!-- 配置springJdbc的模板類 -->

       <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" autowire="byType">

              <property name="dataSource" ref="dataSource"></property>

       </bean>

       <!-- 定義一個事務管理類 -->

       <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

              <property name="dataSource" ref="dataSource"></property>

       </bean>

       <!-- 開啟注解:如果你的事務管理bean的id是transactionManager,屬性transaction-manager可以不寫 -->

       <tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

 

4.在事務方法上加事務注解@Transactional

package com.zhiyou100.kfs.service;

 

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

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Propagation;

import org.springframework.transaction.annotation.Transactional;

 

import com.zhiyou100.kfs.dao.BookShopDao;

 

/**

 *   書店Service的接口的實現類

 * @author KFS

 *

 */

@Service

public class BookShopServiceImp implements BookShopService{

       @Autowired

       private BookShopDao bookShopDao;

      

       public void setBookShopDao(BookShopDao bookShopDao) {

              this.bookShopDao = bookShopDao;

       }

       /**

        *   更新用戶余額

        */

       @Transactional     //事務注解

       @Override

       public void purchase(String username, String isbn) {

              //查書的價格

              double price=bookShopDao.finBookPriceByIsbn(isbn);

              //更新書的庫存

              bookShopDao.updateBookShop(isbn);

              //更新用戶余額

              bookShopDao.updateAccount(username, price);

       }

 

}

5.測試

package com.zhiyou100.kfs.dao;

 

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

 

import com.zhiyou100.kfs.service.xml.BookShopService;

 

public class Test {

 

       public static void main(String[] args) {

              ApplicationContext app=new ClassPathXmlApplicationContext("appxml.xml");

              BookShopService bss=(BookShopService)app.getBean("bookShopServiceImp");

              bss.purchase("tom", "001");

       }

 

}

 

spring事務管理的xml使用:

1.導入jar包

 

 

2.定義一個bean事務管理類

3.在事務方法中不用注解

4.在spring配置文件中配置

<?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-4.2.xsd

              http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd

              http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">

 

       <context:component-scan base-package="com.zhiyou100.kfs.service.xml,com.zhiyou100.kfs.dao"></context:component-scan>

       <!-- 配置數據源(里面存放了若干個連接對象):數據庫交互的。    數據源:c3p0,druid(阿里) -->

       <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

              <property name="user" value="root"/>

              <property name="password" value="123"/>

              <property name="driverClass" value="com.mysql.jdbc.Driver"></property>

              <property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/test"></property>

       </bean>

      

       <!-- 配置springJdbc的模板類 -->

       <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" autowire="byType">

              <property name="dataSource" ref="dataSource"></property>

       </bean>

       <!-- 定義一個事務管理類 -->

       <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

              <property name="dataSource" ref="dataSource"></property>

       </bean>

       <!-- 建議:設置事務方法屬性 -->

       <tx:advice transaction-manager="transactionManager" id="advice">

              <tx:attributes>

                     <!-- read-only:只讀。用在查詢上 -->

                     <tx:method name="query*" read-only="true"/>

                     <tx:method name="purchase" propagation="REQUIRED"/>

                     <tx:method name="insert*"/>

                     <tx:method name="*"/>

              </tx:attributes>

       </tx:advice>

       <!-- xml切面的配置 -->

       <aop:config>

              <!-- 切點 -->

              <aop:pointcut expression="execution(* com.zhiyou100.kfs.service.xml.*.*(..))" id="pointcut"/>

              <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/>

       </aop:config>

</beans>

5.然后測試


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