Spring整合mybatis框架MapperScannerConfigurer的使用

回顾上一个案例，如果在真实的项目中，映射器比较多的情况下，我们可以使用MapperScannerConfigure扫描基准包

<?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:p="http://www.springframework.org/schema/p"
    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-3.2.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd 
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.2.xsd ">

    <!--配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url"
            value="jdbc:mysql://localhost:3306/smbms?useUnicode=true&amp;characterEncoding=utf-8"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>

    </bean>
    <!--配置SqlSessionFactoryBean -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--获取到你的数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!--获取到mybatis的配置文件  注意这里使用的是value属性 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!--使用下面这种方式获取sql文件  -->
        <property name="mapperLocations">
            <list>
                <value>classpath:cn/smbms/dao/**/*.xml</value>
            </list>
        </property> 
    </bean>

    <!-- 如果在真实的项目中，映射器比较多的情况下，我们可以使用MapperScannerConfigure扫描基准包 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.smbms.dao"></property>
    </bean>
    
</beans>

我们可以看下SpringIOC容器为我们创建的Bean的名称：

    @Test
    public void testGetUserList(){
        
        User userCondition = new User();
        userCondition.setUserName("赵");
        userCondition.setUserRole(3);        
        //UserMapper userMapper=new UserMapperImpl();
        ApplicationContext ctx=new 
                ClassPathXmlApplicationContext("applicationContext.xml");
        
        
        //我们可以看下，容器为我们创建的bean的名称
        for(String name:ctx.getBeanDefinitionNames()){
            logger.info("IOC容器创建的Bean:"+name);
        }
        UserMapper userMapper=(UserMapper) ctx.getBean("userMapper");    
        
        
        List<User> userList = userMapper.getUserList(userCondition);
    
        for(User user: userList){
            logger.debug("testGetUserList userCode: " + user.getUserCode() + 
                        " and userName: " + user.getUserName() + 
                        " and userRole: " + user.getUserRole() + 
                        " and userRoleName: " + user.getUserRoleName() +
                        " and age: " + user.getAge() +
                        " and address: " + user.getAddress());
        }
    }
    

运行结果：

[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:dataSource
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:sqlSessionFactory
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:org.mybatis.spring.mapper.MapperScannerConfigurer#0
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:userMapper
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:org.springframework.context.annotation.internalConfigurationAnnotationProcessor
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:org.springframework.context.annotation.internalAutowiredAnnotationProcessor
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:org.springframework.context.annotation.internalRequiredAnnotationProcessor
[INFO] 2020-01-05 15:17:25,387 cn.smbms.dao.user.UserMapperTest - IOC容器创建的Bean:org.springframework.context.annotation.internalCommonAnnotationProcessor
[DEBUG] 2020-01-05 15:17:25,387 org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'userMapper'
[DEBUG] 2020-01-05 15:17:25,397 org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
[DEBUG] 2020-01-05 15:17:25,397 org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4ca68fd8] was not registered for synchronization because synchronization is not active
[DEBUG] 2020-01-05 15:17:25,417 org.springframework.jdbc.datasource.DataSourceUtils - Fetching JDBC Connection from DataSource
[DEBUG] 2020-01-05 15:17:25,417 org.mybatis.spring.transaction.SpringManagedTransaction - JDBC Connection [jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf-8, UserName=root@localhost, MySQL-AB JDBC Driver] will not be managed by Spring
[DEBUG] 2020-01-05 15:17:25,417 cn.smbms.dao.user.UserMapper.getUserList - ooo Using Connection [jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf-8, UserName=root@localhost, MySQL-AB JDBC Driver]
[DEBUG] 2020-01-05 15:17:25,417 cn.smbms.dao.user.UserMapper.getUserList - ==>  Preparing: select u.*,r.roleName from smbms_user u,smbms_role r where u.userName like CONCAT ('%',?,'%') and u.userRole = ? and u.userRole = r.id 
[DEBUG] 2020-01-05 15:17:25,436 cn.smbms.dao.user.UserMapper.getUserList - ==> Parameters: 赵(String), 3(Integer)
[DEBUG] 2020-01-05 15:17:25,446 org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4ca68fd8]
[DEBUG] 2020-01-05 15:17:25,446 org.springframework.jdbc.datasource.DataSourceUtils - Returning JDBC Connection to DataSource
[DEBUG] 2020-01-05 15:17:25,446 cn.smbms.dao.user.UserMapperTest - testGetUserList userCode: zhaoyan and userName: 赵燕 and userRole: 3 and userRoleName: 普通员工 and age: 34 and address: 北京市海淀区回龙观小区10号楼