MyBatis Plus构建一个简单的项目的实现

 <!-- 数据库依赖-->
 <dependency>
 <groupId>mysql</groupId>
 <artifactId>mysql-connector-java</artifactId>
 </dependency>
 <!-- lombok 依赖-->
 <dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 </dependency>
 <!-- mybatis- plus 依赖-->
 <dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatis-plus-boot-starter</artifactId>
 <version>3.2.0</version>
 </dependency>

 #数据库连接配置
datasource:
 driver-class-name: com.mysql.cj.jdbc.Driver
 url: jdbc:mysql:///test?serverTimezone=UTC
 username: root
 password: root

#mybatis-plus配置
mybatis-plus:
 typeAliasesPackage: com.entity
 configuration:
 auto-mapping-behavior: full
use-generated-keys: true
 global-config:
 db-config:
 #主键类型 id_worker:"数据库ID自增" auto+@TableId:"可以获得主键值"
  id-type: auto

  @MapperScan(basePackages = "com.dao")
 @SpringBootApplication
public class MybatisPlusDemoApplication {

 public static void main(String[] args) {
 SpringApplication.run(MybatisPlusDemoApplication.class, args);
 System.out.println("项目启动");
 }
}

 @Data
 public class Users {

 private Integer id;
 private String username;
 private String password;
}

 public interface UsersDao extends BaseMapper<Users> {

}

 public interface IUserserver extends IService<Users> {
}

@Transactional
@Service
public class UserServer extends ServiceImpl<UsersDao,Users> implements IUserserver{
}

@RestController
public class UserController {

@Autowired
private IUserserver user;

@RequestMapping(value = "testonr")
public List<Users> testonr(){
  return user.list();
}
}