配置依赖项

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>my_ms</groupId>
    <artifactId>my_ms</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <!-- 持久层依赖：mysql驱动、dbcp连接池、mybatis、mybatis和spring整合依赖、spring依赖 -->
    <dependencies>
        <!-- spring ioc组件需要的依赖包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <!-- 基于AspectJ的aop依赖包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <!-- spring 事务管理和JDBC依赖包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.1.RELEASE</version>
        </dependency>
        <!-- spring 单元测试组件包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.1.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <!-- 单元测试Junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <!-- mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>
        <!-- dbcp连接池依赖包 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- mybatis依赖 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>
        <!-- mybatis-spring整合依赖 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.3</version>
        </dependency>
    </dependencies>
    <!-- 业务层依赖：aop相关依赖 -->
    <build>
        <plugins>
            <!-- 配置Maven的JDK编译级别 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

创建配置文件

applicationContext-dao.xml(持久层)

路径：src/main/resources/spring/applicationContext-dao.xml

方式一(不推荐)

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    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/tx
        http://www.springframework.org/schema/tx/spring-tx.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="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName"
            value="com.mysql.cj.jdbc.Driver"></property>
        <property name="url"
            value="jdbc:mysql://localhost:3306/demo?useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
    </bean>
    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory"
        class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入dataSource -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- mybatis批量别名配置 -->
        <property name="typeAliasesPackage" value="com.cyb.ms.po"></property>
        <!-- 注入mybatis的全局配置文件路径(该部分可以被省略) -->
        <!-- <property name="configLocation" value="mybatis/SqlMapConfig.xml"></property> -->
    </bean>
    <!-- 相当于配置之前的AccountDao持久层bean -->
    <!-- 配置Mapper代理对象方式一： MapperFactoryBean -->
    <!-- 通过MapperFactoryBean生成的代理对象，一次只能针对一个接口进行生成 -->
    <!-- 注意事项：mapper接口类和mapper映射文件同包同名 -->
    <bean id="accountMapper"
        class="org.mybatis.spring.mapper.MapperFactoryBean">
        <!-- 注入SqlSessionFactory -->
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
        <!-- 注入目标接口类 -->
        <property name="mapperInterface"
            value="com.cyb.ms.mapper.AccountMapper"></property>
    </bean>
</beans>

方式二(推荐)

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    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/tx
        http://www.springframework.org/schema/tx/spring-tx.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="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName"
            value="com.mysql.cj.jdbc.Driver"></property>
        <property name="url"
            value="jdbc:mysql://localhost:3306/demo?useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
    </bean>
    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory"
        class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入dataSource -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- mybatis批量别名配置 -->
        <property name="typeAliasesPackage" value="com.cyb.ms.po"></property>
        <!-- 注入mybatis的全局配置文件路径(该部分可以被省略) -->
        <!-- <property name="configLocation" value="mybatis/SqlMapConfig.xml"></property> -->
    </bean>
    <!-- 配置Mapper代理对象方式二：MapperScannerConfigurer -->
    <!-- 批量代理对象的生成 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 指定需要生成代理的接口所在的包名 -->
        <property name="basePackage" value="com.cyb.ms.mapper"></property>
        <!-- 注意事项：不要配置SqlSessionFactory -->
        <!-- <property name="sqlSessionFactory" ref=""></property> -->
    </bean>
</beans>

applicationContext-service.xml(业务层)

 路径：src/main/resources/spring/applicationContext-service.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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    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/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!-- 扫描业务bean -->
    <context:component-scan
        base-package="com.cyb.ms.service"></context:component-scan>
</beans>

applicationContext-tx.xml(事务)

 路径:src/main/resources/spring/applicationContext-tx.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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    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/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 配置平台事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 事务通知 -->
    <!-- tx:advice:对应的处理器类是TransactionInterceptor类(实现了MethodInterceptor) -->
    <!-- TransactionInterceptor类实现事务是通过transaction-manager属性指定的值进行事务管理 -->
    <tx:advice id="txAdvice"
        transaction-manager="transactionManager">
        <!-- 设置事务管理信息 -->
        <tx:attributes>
            <!-- 增删改使用REQUIRED事务传播行为 -->
            <!-- 查询使用read-only -->
            <tx:method name="transfer*" propagation="REQUIRED"
                isolation="DEFAULT" />
        </tx:attributes>
    </tx:advice>
    <!-- 基于AspectJ+XML方式实现声明式事务 -->
    <aop:config>
        <!-- aop:advisor标签使用的是传统spring aop开发方式实现的 -->
        <!-- spring已经实现了该增强功能，spring使用的是实现MethodInterceptor接口的方式实现的 -->
        <aop:advisor advice-ref="txAdvice"
            pointcut="execution(* *..*.*ServiceImpl.*(..))" />
    </aop:config>
</beans>

数据层

创建包：com.cyb.ms.mapper

 AccountMapper.java

package com.cyb.ms.mapper;

import org.apache.ibatis.annotations.Param;

public interface AccountMapper {
    void update(@Param("name") String name, @Param("money") int money);

    int queryMoney(String name);
}

AccountMapper.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.cyb.ms.mapper.AccountMapper">
    <!-- 查询 -->
    <select id="queryMoney" parameterType="string" resultType="int">
        select money from s_account where name = #{name}
    </select>
    <!-- 修改 -->
    <update id="update" parameterType="map">
        UPDATE S_ACCOUNT SET money=#{money} WHERE name = #{name}
    </update>
</mapper>

业务层

创建包：com.cyb.ms.service

AccountService.java

package com.cyb.ms.service;

public interface AccountService {
    void transfer(String from, String to, int money);
}

AccountServiceImpl.java

package com.cyb.ms.service;

import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.cyb.ms.mapper.AccountMapper;

@Service
public class AccountServiceImpl implements AccountService {
    @Resource
    private AccountMapper mapper;

    @Override
    public void transfer(String from, String to, int money) {
        // 先查询from账户的钱
        int fromMoney =  mapper.queryMoney(from);
        // 对from账户进行扣钱操作
        mapper.update(from, fromMoney - money);
        // 先查询to账户的钱
        int toMoney = mapper.queryMoney(to);
        // 对to账户进行加钱操作
        mapper.update(to, toMoney + money);
    }
}

测试类

package com.cyb.ms.service;

import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:spring/applicationContext-*.xml"})
public class AccountServiceTest {

    @Resource
    private AccountService Service;

    @Test
    public void testTransfer() {
        Service.transfer("老公", "老婆", 1000);
    }
}

项目结构图

 

 

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本文链接：https://www.cnblogs.com/chenyanbin/p/11908973.html