此前没有用过mybaties，先记录吧，后期理一下Redis，mybaties等知识的关系

import javax.sql.DataSource;

import org.mybatis.spring.SqlSessionFactoryBean;

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.core.io.Resource;

import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import org.springframework.core.io.support.ResourcePatternResolver;

@Configuration

public class MyBatisConfig {

    @Bean

    @ConditionalOnMissingBean //当容器里没有指定的Bean的情况下创建该对象

    public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {

        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();

        // 设置数据源

        sqlSessionFactoryBean.setDataSource(dataSource);

        // 设置mybatis的主配置文件

        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        Resource mybatisConfigXml = resolver.getResource("classpath:mybatis/mybatis-config.xml");

        sqlSessionFactoryBean.setConfigLocation(mybatisConfigXml);

        // 设置别名包

        sqlSessionFactoryBean.setTypeAliasesPackage("com.taotao.cart.pojo");

        return sqlSessionFactoryBean;

    }

}

然后，创建Mapper接口的扫描类MapperScannerConfig：

import org.mybatis.spring.mapper.MapperScannerConfigurer;

import org.springframework.boot.autoconfigure.AutoConfigureAfter;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

@Configuration

@AutoConfigureAfter(MyBatisConfig.class) //保证在MyBatisConfig实例化之后再实例化该类

public class MapperScannerConfig {

    // mapper接口的扫描器

    @Bean

    public MapperScannerConfigurer mapperScannerConfigurer() {

        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();

        mapperScannerConfigurer.setBasePackage("com.taotao.cart.mapper");

        return mapperScannerConfigurer;

    }

}