spring boot的maven项目报404错误

$.ajax({

            async: false,

            type: "POST",

            url:'searchFileSource',

            contentType : "application/x-www-form-urlencoded; charset=utf-8",

            data: {"logicalId": logicalId},

            dataType: "json",

            success: function (data) {

                jQuery("#SEND_SOURCE").empty();

                jQuery("#SEND_SOURCE").append("<option value=''>请选择</option>");

                for(var i=0;i<data.data.length;i++){

                    jQuery("#SEND_SOURCE").append("<option value='"+data.data[i].ID+"'>"+data.data[i].SOURCE_NAME+"</option>");

                }

            }

        });

@PostMapping("/searchFileSource")

    public Result<Object> searchFileSource(String logicalId){

        List<Map<String, Object>> fileSourceList = fileTaskService.findFileSource(logicalId);

        return ResultUtil.success(ResultEnum.SEARCH_SUCCESS, fileSourceList);

    }

但是报404,找不到searchFileSource.jsp,原因是因为这个类的注解写的是@Controller,应该用注解@RestController