java - 在 Java8 中的可选中抛出自定义异常

Question

我有这段代码，如果找不到资源，我想抛出一个异常

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

但是我得到一个编译错误:

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

Answer 1

试试这个并确保 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 "。