在不使用@NonNull的情况下使用Lombok @RequiredArgsConstructor [英] Use Lombok @RequiredArgsConstructor without @NonNull

问题描述

我有这样的东西:

@RequiredArgsConstructor
public class Person {
    private String name;
    private LocalDate date = null;
}

我只需要为name属性创建一个构造函数，但是它不起作用.如果我使用@NonNull，它将构建所需的构造函数，但就我而言，名称应该可以为null，也不能为final.有任何想法吗?谢谢！

I need a constructor for the name attribute only, but it is not working. If I use @NonNull it will build the constructor I need, but for my case the name should be able to be null, can not be final either. Any ideas? Thanks!

推荐答案

龙目岛@RequiredArgsConstructor当前没有这样的选项.

Lombok @RequiredArgsConstructor has no such option currently.

您至少有两个选择:

1. 无需使用 lombok 注释.

2. 使用继承-在您的情况下可能有点过分解决，但在某些情况下可能会很方便-如下所示:

1. Just code the constructor public Person(String name) without help of lombok annotations.

2. Use inheritance - which might be a bit overkill solution in your case but might be handy in some cases - as presented below:

• 创建一个基类，该基类包含您不想包含在Person构造函数中的所有字段:

• Create a base class that holds all the fields you do not want to be in Person constructor:

public abstract class BasePerson {
    private LocalDate date = null;
}

让您的Person类在上面扩展您需要的构造函数中的字段，但也希望通过@AllArgsConstructor成为null:

Let your Person class extend above with the fields you need in constructor but want to be null also, with @AllArgsConstructor:

@AllArgsConstructor
public abstract class Person extends BasePerson {
    private String name;
}

这篇关于在不使用@NonNull的情况下使用Lombok @RequiredArgsConstructor的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！