// 二级联动
@RequestMapping("/all/{gid}")
@RequiresPermissions("platform:classes:all")
public R list1(@PathVariable("gid") int gid){
Mapmap=new HashMap<>();
map.put("gid",gid);
List list1 = classesService.selectByMap(map);
return R.ok().put("classes", list1);
} 这个时候启动 postman 可以检测一下是否有值
//二级联动
@RequestMapping("/all")
@RequiresPermissions("platform:grade:all")
public R list(){
Map map = new HashMap<>();
List list = gradeService.selectByMap(map);
return R.ok().put("grade", list);
}