spring事务学习（转账案例）(一)

一、创建数据库并插入数据

create database spring_transaction;

use spring_transaction;

create table account(

id int primary key auto_increment,

username varchar(50),

money int

);

insert into account(username,money) values('jack',1000);

insert into account(username,money) values('rose',1000);

数据环境

二、无事务下操作数据

1、项目结构及引用的相应jar包

2、创建接口AccountDao及其实现类AccountDaoImpl(实现类继承自JdbcDaoSupport，可以直接获得jdbc模板对象)

package com.hujp.dao;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public interface AccountDao {

    /**

     * 收款（入）

     * @param inUser

     * @param money

     */

    public void in(String inUser,int money);

    /**

     * 汇款（出）

     * @param outUser

     * @param money

     */

    public void out(String outUser,int money);

}

AccountDao

package com.hujp.dao.impl;

import com.hujp.dao.AccountDao;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {

    @Override

    public void in(String inUser, int money) {

        this.getJdbcTemplate().update("UPDATE account SET money=money+? WHERE username=?",money,inUser);

    }

    @Override

    public void out(String outUser, int money) {

        this.getJdbcTemplate().update("UPDATE account SET money=money-? WHERE username=?", money, outUser);

    }

}

AccountDaoImpl

3、创建接口AccountService及其实现类AccountServiceImpl(实现类里需要有AccountDao字段，在spring配置中注入)

package com.hujp.service;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public interface AccountService {

    public void transfer(String outUser,String inUser,int money);

}

AccountService

package com.hujp.service.impl;

import com.hujp.dao.AccountDao;

import com.hujp.service.AccountService;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public class AccountServiceImpl implements AccountService {

    private AccountDao accountDao;

    public void setAccountDao(AccountDao accountDao) {

        this.accountDao = accountDao;

    }

    @Override

    public void transfer(String outUser, String inUser, int money) {

        this.accountDao.out(outUser, money);

        //模拟断电

        //int m=2/0;

        this.accountDao.in(inUser, money);

    }

}

AccountServiceImpl

4、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: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.xsd

                           http://www.springframework.org/schema/aop

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

       <!--配置数据源-->

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

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

           <property name="jdbcUrl" value="jdbc:mysql:///spring_transaction"></property>

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

           <property name="password" value="hjp123"></property>

       </bean>

       <!--配置Dao-->

       <bean id="accountDao" class="com.hujp.dao.impl.AccountDaoImpl">

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

       </bean>

       <!--配置Service-->

       <bean id="accountService" class="com.hujp.service.impl.AccountServiceImpl">

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

       </bean>

</beans>

applicationContext

package com.hujp;

import com.hujp.service.AccountService;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public class TestApp {

    @Test

    public void demo1() {

        String xmlPath = "applicationContext.xml";

        ApplicationContext applicationContext=new ClassPathXmlApplicationContext(xmlPath);

        AccountService accountService= (AccountService) applicationContext.getBean("accountService");

        accountService.transfer("jack","rose",100);

    }

}

测试类

5、代码结构图

二、手动操作事务管理数据库

事务管理主要在service层，所以需要改动两个文件即可，一个是application配置文件，另一个是AccountServiceImpl实现类

在实现类中，事务模板对象执行execute方法，重写事务返回无结果集抽象类TransactionCallbackWithoutResult的抽象方法doInTransactionWithoutResult达到事务管理目的

package com.hujp.service.impl;

import com.hujp.dao.AccountDao;

import com.hujp.service.AccountService;

import org.springframework.transaction.TransactionStatus;

import org.springframework.transaction.support.TransactionCallbackWithoutResult;

import org.springframework.transaction.support.TransactionTemplate;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public class AccountServiceImpl implements AccountService {

    private AccountDao accountDao;

    public void setAccountDao(AccountDao accountDao) {

        this.accountDao = accountDao;

    }

    //事务操作一般在service层进行操作

    private TransactionTemplate transactionTemplate;

    public void setTransactionTemplate(TransactionTemplate transactionTemplate) {

        this.transactionTemplate = transactionTemplate;

    }

    @Override

    public void transfer(final String outUser,final String inUser, final int money) {

        //无结果集操作

        this.transactionTemplate.execute(new TransactionCallbackWithoutResult() {

            @Override

            protected void doInTransactionWithoutResult(TransactionStatus transactionStatus) {

                accountDao.out(outUser, money);

                //模拟断电

                //int m=2/0;

                accountDao.in(inUser, money);

            }

        });

    }

}

AccountServiceImpl

<?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: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.xsd

                           http://www.springframework.org/schema/aop

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

    <!--配置数据源-->

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

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

        <property name="jdbcUrl" value="jdbc:mysql:///spring_transaction"></property>

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

        <property name="password" value="hjp123"></property>

    </bean>

    <!--配置Dao-->

    <bean id="accountDao" class="com.hujp.dao.impl.AccountDaoImpl">

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

    </bean>

    <!--配置Service-->

    <bean id="accountService" class="com.hujp.service.impl.AccountServiceImpl">

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

        <!--一般事务操作在service层进行，所以在service层注入模板-->

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

    </bean>

    <!--事务管理要提供事务管理器，事务是从数据库连接中获得的，而数据库连接是从连接池中获得的-->

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

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

    </bean>

    <!--提供事务模板，事务模板要在平台上进行事务操作-->

    <bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">

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

    </bean>

</beans>

applicationContext.xml

三、使用工厂bean创建代理管理事务

继续使用无事务下操作数据库的工程，测试类中accountService对象由代理类创建，并在配置文件配置工厂bean内配置事务

主要改两个文件，一个是测试类，其中获得service对象通过工厂bean获得；另一个是在applicationContext.xml文件中配置工厂bean和事务操作

package com.hujp;

import com.hujp.service.AccountService;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**

 * Created by JiaPeng on 2015/11/4.

 */

public class TestApp {

    @Test

    public void demo1() {

        String xmlPath = "applicationContext.xml";

        ApplicationContext applicationContext=new ClassPathXmlApplicationContext(xmlPath);

        AccountService accountService= (AccountService) applicationContext.getBean("proxyService");

        accountService.transfer("jack","rose",100);

    }

}

测试类

<?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: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.xsd

                           http://www.springframework.org/schema/aop

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

    <!--配置数据源-->

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

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

        <property name="jdbcUrl" value="jdbc:mysql:///spring_transaction"></property>

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

        <property name="password" value="hjp123"></property>

    </bean>

    <!--配置Dao-->

    <bean id="accountDao" class="com.hujp.dao.impl.AccountDaoImpl">

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

    </bean>

    <!--配置Service(目标类)-->

    <bean id="accountService" class="com.hujp.service.impl.AccountServiceImpl">

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

    </bean>

    <!--创建service代理对象之后使用的是代理对象-->

    <bean id="proxyService" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">

        <!--确定事务管理器-->

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

        <!--确定接口-->

        <property name="proxyInterfaces" value="com.hujp.service.AccountService"></property>

        <!--确定目标类-->

        <property name="target" ref="accountService"></property>

        <!--配置事务属性（事务详情）-->

        <property name="transactionAttributes">

            <!--

                prop.key 表示事务详情名称，用于指定哪些方法使用设置的详情

                比如目标类中的transfer方法

                如果是add*，表示以add开头的方法；如果是*表示任意方法

                prop.text 表示当前方法使用具体详情设置

                    格式：PROPAGATION,ISOLATION,readOnly,-Exception,+Exception

                          传播行为     隔离级别   是否只读 异常回滚   异常提交

                例如：PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ表示默认的传播行为和隔离级别

                      PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ,readOnly表示只读

                      java.lang.ArithmeticException此异常是在断电程序中出现的

                      PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ,+java.lang.ArithmeticException表示异常提交

            -->

            <props>

                <!--<prop key="transfer">PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ</prop>

                <prop key="transfer">PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ,readOnly</prop>-->

                <prop key="transfer">PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ,+java.lang.ArithmeticException</prop>

            </props>

        </property>

    </bean>

    <!--管理器-->

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

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

    </bean>

</beans>

applicationContext

巴特西

spring事务学习（转账案例）(一)

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