1.pom.xml中添加boot对mybatis的支持包以及mysql的支持包:
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>2.application.properties配置文件中添加如下配置：
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/testdb?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driverClassName = com.mysql.jdbc.Driver
mybatis.mapperLocations=classpath:mapper/*.xml
mybatis.typeAliasesPackage=com.yzh.entity3.启动类添加注解，扫描dao层：
@MapperScan("com.yzh.mapper")//扫描dao层