java - 在Java8中的可选中抛出自定义异常

Question

我有这段代码，我想在找不到资源的情况下抛出异常

Menu menu = menuService.findById(addMenuAmount.getMenuId())
                    .orElseThrow(com.tdk.web.exception.ResourceNotFoundException(“menu "  + 
                            addMenuAmount.getMenuId() + " not found "));

但我得到一个编译错误：

com.tdk.web.exception cannot be resolved to a type

标签： javajava-8optional

Answer 1

试试这个并确保它com.tdk.web.exception.ResourceNotFoundException是可访问的

Menu menu = menuService.findById(addMenuAmount.getMenuId())
                    .orElseThrow(() -> new com.tdk.web.exception.ResourceNotFoundException("menu "  + 
                            addMenuAmount.getMenuId() + " not found "));

注意 lambda() ->和引号"menu "。