5分钟快速学会spring boot整合Mybatis的方法

 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.1.8.RELEASE</version>
 <relativePath />
 </parent>

 <dependencies>
 <!-- SpringBoot 测试 -->
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-test</artifactId>
  <scope>test</scope>
 </dependency>

 <!-- mybatis 支持 SpringBoot -->
 <dependency>
  <groupId>org.mybatis.spring.boot</groupId>
  <artifactId>mybatis-spring-boot-starter</artifactId>
  <version>1.1.1</version>
 </dependency>

 <!-- mysql 驱动 -->
 <dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>5.1.38</version>
 </dependency>

 <!-- SpringBoot web组件 -->
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 </dependencies>

spring:
 datasource:
 url: jdbc:mysql://localhost:3306/yys_springboot_mybatis
 username: root
 password: 123456
 driver-class-name: com.mysql.jdbc.Driver

/**
 * 用户管理
 * Entity
 * @author yys
 */
public class UserEntity implements Serializable {

 private Long id;

 private String name;

 private Integer age;

 private Byte status;

 @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss", timezone="GMT+8")
 private Date createTime;

 @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss", timezone="GMT+8")
 private Date updateTime;

 public Long getId() {
 return id;
 }

 public void setId(Long 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 Byte getStatus() {
 return status;
 }

 public void setStatus(Byte status) {
 this.status = status;
 }

 public Date getCreateTime() {
 return createTime;
 }

 public void setCreateTime(Date createTime) {
 this.createTime = createTime;
 }

 public Date getUpdateTime() {
 return updateTime;
 }

 public void setUpdateTime(Date updateTime) {
 this.updateTime = updateTime;
 }
}

/**
 * 用户管理
 * Controller
 * @author yys
 */
@RestController
@RequestMapping("/user")
public class UserController {

 @Autowired
 private UserService userService;

 @RequestMapping("/add")
 public String addUser(String userName, Integer age) {
 return userService.addUser(userName, age) ? "success" : "fail";
 }

 @RequestMapping("/get")
 public UserEntity getUserByName(String userName) {
 return userService.getUserByName(userName);
 }
}

/**
 * 用户管理
 * Service
 * @author yys
 */
@Service
public class UserService {

 @Autowired
 private UserMapper userMapper;

 public boolean addUser(String userName, Integer age) {
 return userMapper.insert(userName, age) > 0 ? true : false;
 }

 public UserEntity getUserByName(String userName) {
 return userMapper.findByName(userName);
 }
}

/**
 * 用户管理
 * Mapper
 * @author yys
 */
public interface UserMapper {

 @Select("SELECT id, user_name AS name, age, status, create_time AS createTime, update_time AS updateTime FROM yys_user WHERE user_name = #{name}")
 UserEntity findByName(@Param("name") String name);

 @Insert("INSERT INTO yys_user VALUES (NULL, #{name}, #{age}, 1, NOW(), NOW())")
 int insert(@Param("name") String name, @Param("age") Integer age);

}

@SpringBootApplication
@MapperScan("com.yys.mapper")
public class YysApp {

 public static void main(String[] args) {
  SpringApplication.run(YysApp.class, args);
 }
}

CREATE TABLE `yys_user` (
 `id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'ID，自增列',
 `user_name` varchar(32) NOT NULL COMMENT '用户名',
 `age` int(11) NOT NULL COMMENT '用户年龄',
 `status` tinyint(2) NOT NULL DEFAULT '1' COMMENT '状态：-1-删除；1-正常；',
 `create_time` datetime NOT NULL COMMENT '创建时间',
 `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;