后台控制层控制为非必填即可：
@RequestMapping("/addDo"
)
@SJson
@SLog(description = "Car_main"
)
@RequiresPermissions("store.car.manager.add"
)
public Object addDo(Car_main carMain, @RequestParam(value = "images",required =
false) String images, HttpServletRequest req) {
}
转载于:https://www.cnblogs.com/hedongfei/p/7773278.html
