Spring 检查@PathVariable数据绑定器结果是否为null并抛出404

在我的SpringBoot应用程序中，我有一个用SpringSecurity保护的SpringMVC方法 我将id作为路径变量和spring数据参数解析器传递给该方法，以查找并绑定实体 但当id无效时，实体为空；我想在实体为空时抛出404；因为spring安全预授权需要一个非空实体来检查用户授权； 我的代码是：

 @PutMapping(value = "/{address}")
    @PreAuthorize("isAuthenticated() and (#address.user.id == #user.id)")
    public ResponseEntity<ResponseModel> update(@Valid @RequestBody AddressModel addressModel, @PathVariable Address address, @AuthenticationPrincipal User user) {

        try {
            addressService.update(user, address, addressModel);
        } catch (Exception e) {
            return new ResponseEntity<>(new ResponseModel(e.getMessage(), ResponseModel.ResponseStatus.ERROR), HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<>(new ResponseModel(messages.get("def.op.success"), ResponseModel.ResponseStatus.SUCCESS), HttpStatus.OK);
    }

---

但它返回403错误

您不能简单地将注释移动到您的服务中吗

 @PutMapping(value = "/{address}")
    //@PreAuthorize("isAuthenticated() and 
          //(#address.user.id == #user.id)") <-- move to service method
    public ResponseEntity<ResponseModel> update(
             @Valid @RequestBody AddressModel addressModel, @PathVariable Address address, 
                        @AuthenticationPrincipal User user) {

        if(address == null){
           //throw some exception that gets translated to 404
        }

        try {
            //check will be applied on call to service
            addressService.update(user, address, addressModel);
        } catch (Exception e) {
            return new ResponseEntity<>(new ResponseModel(e.getMessage(), 
                     ResponseModel.ResponseStatus.ERROR), HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<>(new ResponseModel(messages.get("def.op.success"), 
                 ResponseModel.ResponseStatus.SUCCESS), HttpStatus.OK);
    }

@PutMapping（value=“/{address}”）
//@预授权（“isAuthenticated（）和
//（#address.user.id==#user.id）”）403表示没有访问权限，因此它可能是由isAuthenticated（）引发的。请确保您具有访问此文件的正确凭据resource@Mustahsan这是真的；但我提到这部分代码是为了暗示；我的空地址问题
 @PutMapping(value = "/{address}")
    //@PreAuthorize("isAuthenticated() and 
          //(#address.user.id == #user.id)") <-- move to service method
    public ResponseEntity<ResponseModel> update(
             @Valid @RequestBody AddressModel addressModel, @PathVariable Address address, 
                        @AuthenticationPrincipal User user) {

        if(address == null){
           //throw some exception that gets translated to 404
        }

        try {
            //check will be applied on call to service
            addressService.update(user, address, addressModel);
        } catch (Exception e) {
            return new ResponseEntity<>(new ResponseModel(e.getMessage(), 
                     ResponseModel.ResponseStatus.ERROR), HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<>(new ResponseModel(messages.get("def.op.success"), 
                 ResponseModel.ResponseStatus.SUCCESS), HttpStatus.OK);
    }