SpringBoot各层写法 | Giftbear Notes

Controller控制层

用于处理前端请求并返回结果

@RestController
@RequestMapping("/task")
public class TaskController {
    @Resource
    ITaskService taskService;

    @RequestMapping(value = "/getTask", method = RequestMethod.GET)
    @ResponseBody
    public RestResult getTask(
        @Parameter(description = "当前页", required = true) long currentPage,
        @Parameter(description = "页面数量", required = true) long pageCount){
            IPage<TaskVo> taskList = taskService.getTasks(currentPage, pageCount);
            return ;
    }

    @RequestMapping(value = "/newTask", method = RequestMethod.POST)
    @ResponseBody
    public RestResult<String> newTask(@RequestBody NewTaskDTO newTaskDTO) {
        return ;
    }
}

Service服务层

提供业务的处理方法

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public interface ITaskService extends IService<Task> {
    IPage<TaskVo> getTasks(Long currentPage, Long pageCount);
}

Serviceimpl: 将mapper层与service层整合

@Service
public class TaskService extends ServiceImpl<TaskMapper, Task> implements ITaskService {
    @Resource
    TaskMapper taskMapper;

    @Override
    public IPage<TaskVo> getTasks(Long currentPage, Long pageCount) {
        Page<TaskVo> page = new Page<>(currentPage, pageCount);
        return taskMapper.getTask(page);
    }
}

Mapper映射层

数据库持久化操作

调用xml执行具体方法:

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public interface TaskMapper extends BaseMapper<Task> {
    IPage<TaskVo> getTask(Page<?> page);
}

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
        
<mapper namespace="com.demo.mapper.TaskMapper">
    <select id="getTask" parameterType="com.demo.domain.Task" resultType="com.demo.vo.TaskVo">
        select * from task
    </select>
</mapper>

直接在mapper中实现:

@Mapper
public interface TaskMapper {	
    @Select("select * from task")
    List<TaskVo> getTask();
}

项目入口添加mapper扫描的位置: @MapperScan("com.demo.mapper")

Model实体层

实体类与数据库表对应

@Entity
@Data
@Table(name = "task")
public class Task {
    @Id //主键
    @Column(columnDefinition="varchar(100) comment '任务ID'")
    private Long taskId;
	
    @Column(columnDefinition="varchar(100) comment '任务名'")
    private String taskName;
}

Vo视图对象

封装页面展示数据

@Data
public class TaskVo {
    private Long taskId;
    private String taskName;
}

Dto数据传输对象

封装数据方便传输

@Data
public class NewTaskDTO {		
    @Schema(description = "任务Id", required = true)
    private Long taskId; 

    @Schema(description = "任务名字", required = true)
    private String taskName;	
}