1. pom.xml

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.20.RELEASE</version>
    </parent>
    <groupId>com.yuyy</groupId>
    <artifactId>03-spring-boot-mybatis</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
        <thymeleaf.version>3.0.2.RELEASE</thymeleaf.version>
        <thymeleaf-layout-dialect.version>2.0.4</thymeleaf-layout-dialect.version>
    </properties>

    <dependencies>
        <!-- web启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- thymeleaf启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!-- mybatis启动器 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- mysql数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- druid数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
    </dependencies>

2. 建立全局配置文件src/main/resources/application.properties

#数据库
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=***
spring.datasource.username=***
spring.datasource.password=***
#数据库连接池
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#pojo对象别名，使用时不用加com.yuyy.pojo
mybatis.type-aliases-package=com.yuyy.pojo

3. 建立数据库

CREATE TABLE `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '编号',
  `name` varchar(255) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;