技術標籤：Mybatis-plus

/**
 * <p>
 * 講師 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2020-12-19
 */
@Api(description="講師管理")
@RestController   //這個註解會把物件轉化為json資料
@RequestMapping("/eduservice/teacher")
@CrossOrigin
public class EduTeacherController {

    @Autowired
    EduTeacherService eduTeacherService;
 


    //1 查詢講師表的所有資料

    //使用的是rest風格   查詢get   新增post  刪除delete  修改put
    @ApiOperation(value = "所有講師列表")
    @GetMapping("/findAll")//這裡的/加不加都對
    public R findAll() {
        //使用的是rest風格   查詢get   新增post  刪除delete  修改put
        List<EduTeacher> list = eduTeacherService.list(null)
 
;

        //自定義異常的丟擲
        try {
            //int i = 1 / 0;
        }catch (Exception e) {
            throw new GuliException(400, "除0異常");
        }
        return R.ok().data("items", list);
    }

    //2 邏輯刪除講師方法
    @ApiOperation(value = "根據ID刪除講師")
    @DeleteMapping("{id}"
 
)
    public R removeTeacher(@ApiParam(name = "id", value = "講師ID", required = true)@PathVariable String id) {
        boolean b = eduTeacherService.removeById(id);

        if(b){
            return R.ok();
        }else {

            return R.error();
        }
    }

    //分頁查詢
    //current當前頁
    //limit每一頁的記錄數
    @GetMapping("/pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable long current, @PathVariable long limit) {
        //建立page物件
        Page<EduTeacher> page = new Page<>(current, limit);

        //呼叫方法的時候，底層封裝，把分頁所有資料封裝到page物件裡面
        eduTeacherService.page(page, null);

        long total = page.getTotal();//獲取總的記錄數
        List<EduTeacher> records = page.getRecords();//返回每頁資料的list集合

        return R.ok().data("total", total).data("rows", records);
    }


    //條件查詢帶分頁
    @PostMapping("/pageteacherCondition/{current}/{limit}")
    public R pageteacherCondition(@PathVariable long current, @PathVariable long limit, @RequestBody(required = false) TeacherQuery teacherQuery) {
        //建立一個page物件
        Page<EduTeacher> page = new Page<>(current, limit);
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();
        //多條件組合查詢  mybatis學過  動態sql
        //判斷條件值是否為空  如果不為空拼接條件值
        String name = teacherQuery.getName();
        System.out.println(name);
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();

        if(!StringUtils.isEmpty(name)) {
            wrapper.like("name", name);
        }

        if(level != null) {
            wrapper.eq("level", level);
        }

        if(!StringUtils.isEmpty(begin)) {
            wrapper.ge("gmt_create", begin);//建立時間要大於開始時間
        }

        if(!StringUtils.isEmpty(end)) {
            wrapper.le("gmt_create", end);//建立時間要小於開始時間
        }

        wrapper.orderByDesc("gmt_create");//按id升序排列

        eduTeacherService.page(page, wrapper);//會把查詢結果封裝到page裡面

        long total = page.getTotal();//獲取總的記錄數

        List<EduTeacher> records = page.getRecords();//返回每頁資料的list集合
        System.out.println(records);
        return R.ok().data("total", total).data("rows", records);
    }

    @PostMapping("/addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher) {//這裡不寫@RequestBody其實也可以

        boolean save = eduTeacherService.save(eduTeacher);
        if(save) {
            return R.ok();
        }else {

            return R.error();
        }
    }

    //根據講師id來查詢
    @GetMapping("getTeacher/{id}")
    public R getTeacher(@PathVariable String id) {
        EduTeacher byId = eduTeacherService.getById(id);
        System.out.println(byId);
        return R.ok().data("teacher", byId);
    }

    //根據id修改teacher
    //還是根據前端填寫表單用post
    @PostMapping("/updateTeacher")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher) {
        boolean b = eduTeacherService.updateById(eduTeacher);

        if(b) {
            return R.ok();
        }else {

            return R.error();
        }
    }
}