1、在pom.xml中导入mybatis及mybatis-plus的相关依赖

<!--        mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

<!--        mybatis plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
<!--        mysql connector-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
            <scope>runtime</scope>
        </dependency>

2、添加配置类

在``config包下添加MybatisConfig.java`配置类：

// MyBatisConfig.java

import javax.annotation.Resource;
import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

/**
 * Mybatis配置
 * @author Louis
 * @date Jan 11, 2019
 */
@Configuration
@MapperScan("com.louis.mango.**.dao")    // 扫描DAO
public class MybatisConfig {
    @Resource
    private DataSource dataSource;

    @Bean
    public SqlSessionFactory sqlSessionFactory() throws Exception {
        SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(dataSource);
        sessionFactory.setTypeAliasesPackage("com.louis.mango.**.model");    // 扫描Model

        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sessionFactory.setMapperLocations(resolver.getResources("classpath*:**/sqlmap/*.xml"));    // 扫描映射文件

        return sessionFactory.getObject();
    }
}

3、在配置文件中配置数据连接源信息

在application.yml文件中添加如下数据库连接配置

注意修改下面内容中的相关配置信息 (DataBaseName、username、password)

spring:
  # 配置数据源信息
  datasource:
    # 配置数据源类型
    type: com.zaxxer.hikari.HikariDataSource
    # 配置连接数据库信息
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/DataBaseName?characterEncoding=utf-8&useSSL=false
    username: username
    password: password

4、配置打包资料源

由于我们默认的xml文件是不在默认的打包范围内的，因此这部分内容需要手动更改

默认的xml存放位置为 resouces/mapper，但是在我们开发的示例代码中，我们将这部分内容移动到了 classpath/sqlmap 下

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <!-- 打包时拷贝MyBatis的映射文件 -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/sqlmap/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.*</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>