Spring - 案例512：银行转账 [xml配置基于IoC、AOP、事务、MyBatis]

Spring - 案例：银行转账 [xml配置基于IoC、AOP、事务、MyBatis]

银行转账操作中，涉及从A账户到B账户的资金转移操作。数据层仅提供单条数据的基础操作，未
设计多账户间的业务操作。

1 导入相关坐标

2 制作实体类 + 数据库表

3 数据层 - AccountDao接口

public interface AccountDao {

    void inMoney(@Param("name") String name, @Param("money") Double money);

    void outMoney(@Param("name") String name, @Param("money") Double money);
    
}

映射配置 - AccountDao.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.dao.AccountDao">

    <update id="inMoney">
        update account set money = money + #{money} where name = #{name}
    </update>

    <update id="outMoney">
        update account set money = money - #{money} where name = #{name}
    </update>

</mapper>

业务层

// AccountService接口
public interface AccountService {

    /**
     * 转账操作
     * @param outName     出账用户名
     * @param inName      入账用户名
     * @param money       转账金额
     */
    public void transfer(String outName, String inName, Double money);
}


// AccountServiceImpl实现类
public class AccountServiceImpl implements AccountService {

    private AccountDao accountDao;
    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }

    public void transfer(String outName, String inName, Double money) {
        accountDao.inMoney(outName,money);
        // 此处测试异常出现后是否会事务回滚
        // int i = 1/0;
        accountDao.outMoney(inName,money);
    }
}

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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--加载perperties配置文件的信息-->
    <context:property-placeholder location="classpath:*.properties"/>

    <!--加载druid第三方资源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!--spring整合mybatis后控制的创建连接用的对象，从mybatis核心配置文件来-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--起别名-->
        <property name="typeAliasesPackage" value="com.itheima.domain"/>
    </bean>

    <!--加载mybatis映射配置的扫描，从mybatis核心配置文件来，确定SQL映射位置-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itheima.dao"/>
    </bean>

     <!--配置service作为spring的bean,注入dao-->
    <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"/>
    </bean>

    <!--定义事务管理器-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--定义事务管理的通知类-->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <!--定义控制的事务-->
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
            <tx:method name="find*" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!--配置事务AOP-->
    <aop:config>
        <aop:pointcut id="pt" expression="execution(* com.itheima.service.*Service.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>

</beans>

测试类

public class App {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        AccountService service = (AccountService) ctx.getBean("accountService");
        service.transfer("jack", "rose", 100.0);
    }
}

标签：xml,name,Spring,void,AOP,accountDao,money,public,String
来源： https://www.cnblogs.com/60kmph/p/14105626.html