<dependencies>

     <dependency>

         <groupId>org.springframework.boot</groupId>

         <artifactId>spring-boot-starter-web</artifactId>

     </dependency>

     <dependency>

         <groupId>org.mybatis.spring.boot</groupId>

         <artifactId>mybatis-spring-boot-starter</artifactId>

     </dependency>

     <dependency>

         <groupId>mysql</groupId>

         <artifactId>mysql-connector-java</artifactId>

     </dependency>

     <dependency>

         <groupId>com.alibaba</groupId>

         <artifactId>druid</artifactId>

     </dependency>

 </dependencies>

 spring.datasource.driverClassName=com.mysql.jdbc.Driver

 spring.datasource.url=jdbc:mysql://127.0.0.1:3306/dbName

 spring.datasource.username=root

 spring.datasource.password=root

 spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

 mybatis.type-aliases-package=io.guangsoft.pojo

1 @SpringBootApplication

2 @MapperScan("io.guangsoft.mapper")

 create table users(

     id int(11) not null auto_increment,

     name varchar(25) default null,

     age int default null,

     primary key (id)

 )engine=InnoDB default charset=utf8;

 public class User {

     private Integer id;

     private String name;

     private Integer age;

     public Integer getId() {

         return id;

     }

     public void setId(Integer id) {

         this.id = id;

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public Integer getAge() {

         return age;

     }

     public void setAge(Integer age) {

         this.age = age;

     }

 }

 public interface UserMapper {

     void insertUser(User user);

     List<User> selectUserAll();

 }

 <mapper namespace="io.guangsoft.mapper.UserMapper">

     <insert id="insertUser" parameterType="user">

         insert into user(name, age) values (#{name}, #{age})

     </insert>

     <select id="selectUserAll" resultType="user">

         select id, name, age from user

     </select>

 </mapper>

 @Service

 @Transactional

 public class UserServiceImpl implements UserService {

     @Autowired

     private UserMapper userMapper;

     @Override

     public void addUser(User user) {

         this.userMapper.insertUser(user);

     }

 }

 @Controller

 @RequestMapping("/user")

 public class UserController {

     @Autowired

     private UserService userService;

     @RequestMapping("/{page}")

     public String showPage(String page) {

         return page;

     }

     @RequestMapping("/addUser")

     public String addUser(User user) {

         this.userService.addUser(user);

         return "ok";

     }

 }