凝聚力:Co的意思是在一起，hesion的意思是粘在一起。粘结:不同物质的微粒粘在一起的系统

举个现实的例子: img礼貌

整体大于部分之和-亚里士多德。

Cohesion is an ordinal type of measurement and is usually described as “high cohesion” or “low cohesion”. Modules with high cohesion tend to be preferable, because high cohesion is associated with several desirable traits of software including robustness, reliability, reusability, and understandability. In contrast, low cohesion is associated with undesirable traits such as being difficult to maintain, test, reuse, or even understand. wiki Coupling is usually contrasted with cohesion. Low coupling often correlates with high cohesion, and vice versa. Low coupling is often a sign of a well-structured computer system and a good design, and when combined with high cohesion, supports the general goals of high readability and maintainability. wiki

理论的区别

凝聚力

内聚性是模块相对功能强度的表征。 内聚模块执行单一任务，几乎不需要与其他模块交互 程序其他部分的组件。 具有高内聚和低耦合的模块称为功能独立模块 其他模块。

衔接的分类

1.巧合2。逻辑3。时间4。程序5。沟通6。连续7。功能

耦合

耦合表示模块之间的相对依赖关系。 两个模块之间的耦合程度取决于它们的接口复杂性。

我认为区别可以归结为以下几点:

内聚表示代码库的一部分在逻辑上形成单一原子单元的程度。 耦合表示单个单元独立于其他单元的程度。 在不破坏内聚的情况下存档完全解耦是不可能的，反之亦然。

在这篇博文中，我将对此进行更详细的描述。

关于内聚的最好解释来自Bob叔叔的《Clean Code》:

类应该有少量的实例变量。类的每个方法都应该操作一个或多个这样的变量。一般来说，方法操作的变量越多，该方法与其类的内聚性就越强。每个方法使用每个变量的类具有最大的内聚性。

一般来说，创建这种最大限度内聚的类既不可取，也不可能;另一方面，我们希望内聚力高。当内聚性高时，这意味着类的方法和变量是相互依赖的，并作为一个逻辑整体挂在一起。

保持函数小和参数列表短的策略有时会导致由方法子集使用的实例变量激增。当这种情况发生时，几乎总是意味着至少有一个其他类试图从较大的类中退出。您应该尝试将变量和方法分离到两个或多个类中，以便新类更具内聚性。

cohesion refers all about how a single class is designed. Cohesion is the Object Oriented principle most closely associated with making sure that a class is designed with a single, well-focused purpose. The more focused a class is, the cohesiveness of that class is more. The advantages of high cohesion is that such classes are much easier to maintain (and less frequently changed) than classes with low cohesion. Another benefit of high cohesion is that classes with a well-focused purpose tend to be more reusable than other classes.

在上图中，我们可以看到，在低内聚情况下，只有一个类负责执行大量不相同的作业，这降低了可重用性和维护的机会。但是在高内聚的情况下，所有的作业都有一个单独的类来执行特定的作业，这样可以获得更好的可用性和可维护性。

凝聚力:Co的意思是在一起，hesion的意思是粘在一起。粘结:不同物质的微粒粘在一起的系统

举个现实的例子: img礼貌

整体大于部分之和-亚里士多德。

Cohesion is an ordinal type of measurement and is usually described as “high cohesion” or “low cohesion”. Modules with high cohesion tend to be preferable, because high cohesion is associated with several desirable traits of software including robustness, reliability, reusability, and understandability. In contrast, low cohesion is associated with undesirable traits such as being difficult to maintain, test, reuse, or even understand. wiki Coupling is usually contrasted with cohesion. Low coupling often correlates with high cohesion, and vice versa. Low coupling is often a sign of a well-structured computer system and a good design, and when combined with high cohesion, supports the general goals of high readability and maintainability. wiki