之间简单配置过SqlSessionFactory，但这并不是正规的整合方式，MyBatis提供了mybatis-spring.jar专门用于两大框架的整合
Spring整合Mybatis的步骤：
- 导入MyBatis整合Spring的相关坐标
<dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.5.RELEASE</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.4</version></dependency>-
编写Mapper和Mapper.xml
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配置SqlSessionFactory和MapperScannerConfigurer
<bean class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property></bean><!-- 作用：扫描指定的包，产生Mapper对象存储到Spring容器--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 扫描的包 --><property name="basePackage" value="com.xfy.mapper"></property></bean><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="com.mysql.jdbc.Driver"></property><property name="url" value="jdbc:mysql:///book?useSSL=false&useServerPrepStmts=true"></property><property name="username" value="root"></property><property name="password" value="1234"></property></bean><bean id="userService" class="com.xfy.service.impl.UserServiceImpl"><property name="userMapper" ref="userMapper"></property></bean>- 编写测试代码
public static void main(String[] args) throws ParseException, IOException {ClassPathXmlApplicationContext applicationContext=new ClassPathXmlApplicationContext("ApplicationContext.xml");UserService userService = applicationContext.getBean("userService", UserService.class);userService.show();UserMapper userMapper = applicationContext.getBean("userMapper", UserMapper.class);for (User user : userMapper.SelectAll()) {System.out.println(user);}}public class UserServiceImpl implements UserService, BeanNameAware {private UserDao userDao;private UserMapper userMapper;String Name;public void setUserMapper(UserMapper userMapper) {this.userMapper = userMapper;}public void show() {List<User> users = userMapper.SelectAll();for (User user : users) {System.out.println(user);}}public interface UserMapper {List<User> SelectAll();
}
Spring整合MyBatis的原理剖析
整合包里提供了一个SqlSessionFactoryBean和一个扫描Mapper的配置对象，SqlSessionFactoryBean一旦实例化，就开始扫描Mapper并通过动态代理产生Mapper的实现类，存储到Spring容器中，相关类：
SqlSessionFactory：需要进行配置，用于提供SqlSessionFactory
MapperSacnnerConfigurer:需要进行配置，用于扫描指定mapper注册BeanDefinition
MapperFactoryBean：Mapper的FactoryBean，获得指定Mapper时调用getObject方法
ClassPathMapperScanner：definition.setAutowireMode（2）修改了自动注入状态，所以MapperFactoryBean中setSqlSessionFactory会自动注入进去
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