首页显示热门课程和名师（接口）

1、 查询热门课程和讲师（8门课程,4名老师）

在service_edu模块添加IndexController。

@Api(description="前台首页展示")
@RestController
@RequestMapping("/eduservice/index")
@CrossOrigin
public class IndexController {
    @Autowired
    private EduCourseService courseService;
    @Autowired
    private EduTeacherService teacherService;
    @ApiOperation(value = "首页展示8条课程信息，4位讲师")
    @GetMapping
    public R getIndexData(){
        //1查询8条课程记录
        //SELECT * FROM edu_course ec ORDER BY id DESC LIMIT 8;
        QueryWrapper<EduCourse> wrapperCourse = new QueryWrapper<>();
        //1.1根据id进行降序排
        wrapperCourse.orderByDesc("id");
        //1.2查询8条记录
        wrapperCourse.last("limit 8");
        List<EduCourse> eduCourseList = courseService.list(wrapperCourse);
        //2查询4位讲师
        QueryWrapper<EduTeacher> wrapperTeacher = new QueryWrapper<>();
        wrapperTeacher.orderByDesc("id");
        wrapperTeacher.last("limit 4");
        List<EduTeacher> eduTeacherList = teacherService.list(wrapperTeacher);
        return R.ok().data("hotCourse",eduCourseList).data("teacher",eduTeacherList);
    }
}

2、测试