重复的代码只会增加不必要的输入层来完成工作。

这些是必要的吗?

在大多数情况下，这些都是结构和装饰性的标记。它提供了代码、函数和语言的一致性。

因此，对于开发人员来说，它有点多余，因为我们已经见过它很多次了，但它确实向非开发人员和编译器传达了一些实际意义。

来自whatis.techtarget.com:

In information technology, a boilerplate is a unit of writing that can be reused over and over without change. By extension, the idea is sometimes applied to reusable programming as in "boilerplate code." The term derives from steel manufacturing, where boilerplate is steel rolled into large plates for use in steam boilers. The implication is either that boilerplate writing has been time-tested and strong as "steel," or possibly that it has been rolled out into something strong enough for repeated reuse.

编程之外:

样板可以与特定类型的模板进行比较 被认为是一个填空样板。一些典型的 样板文件通常包括:任务陈述、安全警告 使用的安装程序、版权声明和责任 免责声明。

以我作为程序员的经验来看，合适的样板代码通常是一堆你开始的代码，这些代码不太大，也不太复杂，不能称为框架。

HTML5 Boilerplate就是一个典型的例子。

Boilerplate definition is becoming more global in many other programming languages nowadays. It comes from OOP and hybrid languages that have become OOP and were before procedual have now the same goal to keep repeating the code you build with a model/template/class/object hence why they adapt this term. You make a template and the only things you do for each instance of a template are the parameters to individualize an object this part is what we call boilerplate. You simply re-use the code you made a template of, just with different parameters.

同义词 蓝图是样板 模板是样板 页脚是一个样板 用于多种用途的设计模式是一个样板 邮件的签名是一份样板文件

样板代码是指可以反复使用的一段代码。另一方面，任何人都可以说它是一段可重用的代码。

这个词实际上来自钢铁行业。

对于一点历史，根据维基百科:

在19世纪90年代，样板版实际上是铸造或冲压成金属，准备印刷，并分发给美国各地的报纸。直到20世纪50年代，成千上万的报纸从美国最大的供应商西部报业联盟那里收到并使用了这种样板文件。有些公司还以样板文件的形式发布新闻稿，这样它们就必须按书面形式打印出来。

根据维基百科:

In object-oriented programs, classes are often provided with methods for getting and setting instance variables. The definitions of these methods can frequently be regarded as boilerplate. Although the code will vary from one class to another, it is sufficiently stereotypical in structure that it would be better generated automatically than written by hand. For example, in the following Java class representing a pet, almost all the code is boilerplate except for the declarations of Pet, name and owner: public class Pet { private PetName name; private Person owner; public Pet(PetName name, Person owner) { this.name = name; this.owner = owner; } public PetName getName() { return name; } public void setName(PetName name) { this.name = name; } public Person getOwner() { return owner; } public void setOwner(Person owner) { this.owner = owner; } }

从维基百科:

在计算机编程中，样板文件是用来描述必须包含在许多地方且很少或没有更改的代码段的术语。它更常用于被认为是冗长的语言，即程序员必须编写大量代码来完成最少的工作。

所以基本上，你可以把样板代码看作是一种编程语言所需要的文本，在你用这种语言编写的程序中经常用到。

现代语言正在尝试减少它，但旧的语言也有特定的类型检查器(例如OCaml有一个类型推断器，它允许您避免在像Java这样更冗长的语言中作为样板代码的太多声明)

它是可以被许多应用程序/上下文使用的代码，只需很少或没有更改。

样板纸(Boilerplate)起源于20世纪初的钢铁工业。