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