spring/wll/AbsenceController.java

package com.yanzhen.controller;

import com.github.pagehelper.PageInfo;
import com.yanzhen.entity.Absence;
import com.yanzhen.entity.Dormitory;
import com.yanzhen.entity.Student;
import com.yanzhen.service.AbsenceService;
import com.yanzhen.service.DormitoryService;
import com.yanzhen.service.StudentService;
import com.yanzhen.utils.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

//导入list和Map集合
import java.util.List;
import java.util.Map;
//缺勤管理的控制器
@RestController
@RequestMapping("/absence")
public class AbsenceController {

    //注入实例
    //注入缺席的服务类
    @Autowired
    private AbsenceService absenceService;
    //注入学生的服务类
    @Autowired
    private StudentService studentService;
    //注入宿舍的服务类
    @Autowired
    private DormitoryService dormitoryService;


    //创建新的实例
    @PostMapping("create")
    public Result create(@RequestBody Absence absence){
        //在缺席的服务类中引用create方法啦创建新的实例
        int flag = absenceService.create(absence);
        //判断是否创建成功
        if(flag>0){
            //成功
            return Result.ok();
        }else{
            //失败
            return Result.fail();
        }
    }

    //根据学生id进行删除缺勤信息
    @GetMapping("delete")
    public Result delete(String ids){
        //在缺席的服务类中引用delete方法删除实例
        int flag = absenceService.delete(ids);
        //判断是否删除成功
        if(flag>0){
            //成功
            return Result.ok();
        }else{
            //失败
            return Result.fail();
        }
    }

    //更新缺勤信息
    @PostMapping("update")
    public Result update(@RequestBody Absence absence){
        //在缺席的服务类中引用updateSelective方法更新信息
        int flag = absenceService.updateSelective(absence);
        //判断是否更新成功
        if(flag>0){
            //成功
            return Result.ok();
        }else{
            //失败
            return Result.fail();
        }
    }

    //根据id删除缺席信息
    @GetMapping("detail")
    public Absence detail(Integer id){
        //返回结果
        return absenceService.detail(id);
    }

    // 根据name查询学生ID--并分页的形式展示出
    @PostMapping("query")
    public Map<String,Object> query(@RequestBody Absence absence){
        //创建分页对象
        PageInfo<Absence> pageInfo = new PageInfo<Absence>();
        //判断absence的页码是否为空
        if(absence.getName() != null){
            //不为空则调取缺席的名字赋给detailId
            Student detailId = studentService.detailByName(absence.getName());
            //如果detailId不为空再获取缺席的id
            if(detailId != null){
                absence.setStudentId(detailId.getId());
            }else{
                //若为空修改值都为null
                pageInfo.setList(null);
                //设置大小为0
                pageInfo.setSize(0);
                //返回结果
                return Result.ok(pageInfo);
            }
        }
        //给pageInfo赋值
        pageInfo = absenceService.query(absence);
        // 遍历查询结果列表
        pageInfo.getList().forEach(entity->{
            //创建对象
            Student detail = studentService.detail(entity.getStudentId());
            // 修改学生信息
            entity.setStudent(detail);
            Dormitory dormitory = dormitoryService.detail(entity.getDormitoryId());
            entity.setDormitory(dormitory);
        });
        //返回结果
        return Result.ok(pageInfo);
    }

}