SpringBoot快速整合通用Mapper的示例代码

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--通用mapper-->
<dependency>
  <groupId>tk.mybatis</groupId>
  <artifactId>mapper-spring-boot-starter</artifactId>
  <version>2.1.5</version>
</dependency>
<!-- pagehelp -->
<dependency>
  <groupId>com.github.pagehelper</groupId>
  <artifactId>pagehelper-spring-boot-starter</artifactId>
  <version>1.2.3</version>
</dependency>

import tk.mybatis.spring.annotation.MapperScan;
@SpringBootApplication
@MapperScan("com.springboot.dao")
public class Application extends SpringBootServletInitializer {
	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}

Table
id

@Table(name = "t_user")
public class User {
    //主键
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)//自增
    private Integer id;  
}

import tk.mybatis.mapper.common.IdsMapper;
import tk.mybatis.mapper.common.Mapper;
public interface MyMapper<T> extends Mapper<T>, IdsMapper<T> {
}

Mapper<T>
IdsMapper<T>

public interface UserDao extends MyMapper<User> {
}

public interface BaseService<T> {
    /**
     * 查询所有
     *
     * @return 返回所有数据
     */
    List<T> selectAll();
    /**
     * 查询数据数量
     * @return
     */
    int selectCount();
    /**
     * 添加
     *
     * @param t   实体
     *
     * @return
     */
    int save(T t);
    /**
     * 修改
     *
     * @param t
     *            实体
     * @return
     */
    int updateByPrimaryKey(T t);
    /**
     * 根据主键删除
     *
     * @param t   主键
     *
     * @return
     */
    int deleteByPrimaryKey(int t);
}

public class BaseServiceImpl<T> implements BaseService<T> {
    @Autowired
    private MyMapper<T> mapper;
    @Override
    public List<T> selectAll() {
        return mapper.selectAll();
    }
    @Override
    public int selectCount() {
        return mapper.selectCount(null);
    }
    @Override
    public int save(T t) {
        return mapper.insert(t);
    }
    @Override
    public int updateByPrimaryKey(T t) {
        return mapper.updateByPrimaryKey(t);
    }
    @Override
    public int deleteByPrimaryKey(int t) {
        return mapper.deleteByPrimaryKey(t);
    }
}

public interface UserService extends BaseService<User>{
}

@Service
public class UserServiceImpl extends BaseServiceImpl<User> implements UserService{
}

@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @PostMapping("/add")
    public Object add(User user) {
        userService.save(user);
        return null;
    }
    @PostMapping("/delete")
    public Object delete(@RequestParam Integer id) {
        userService.deleteByPrimaryKey(id);
        return null;
    }
    @PostMapping("/update")
    public Object update(User user) {
        userService.updateByPrimaryKey(user);
        return null;
    }
    @GetMapping("/detail")
    public User detail(@RequestParam Integer id) {
        User user = userService.selectById(id);
         return user;
    }
    @GetMapping("/list")
    public List<User> list() {
       List<User> list = userService.list();
       return list;
    }
}