abstract interface

Apply DAOGenerator to PHP and MySQL. This article will reveal how to use the DAO design pattern to generate PHP classes that can complete various common MySQL database operations. The Data Access Object (DAO) provides an abstract interface for the

1 single-Case modeDefinition: Ensure that a class has only one instance and provides a global access point; Usage scenario: There are some objects we only need one, such as: thread pool, cache, dialog, registry object, log object, etc., if there are

The seven most basic principles of OO: Single Responsibility Principle: SRP, a class should have only one cause of change, and the responsibilities of different reasons should not be encapsulated togetherPrinciple of open and closed: OCP, the

When I wrote this question, I suddenly remembered the style of Kong Yi in Lu Xun's pen, which is quite a bit of a chew-on style. Although I have been engaged in mobile phone programming for many years, I have been using C and C ++ programming.

Design Mode note 04-factory Mode1 IntroductionIn addition to the new operator, there are more ways to create objects. You will understand that the instantiation activity should not always be made public, and initialization often causes Coupling

Java design pattern-modifier PatternSimulate clothing wear Let's take a look at the following specific case: it is essential for everyone to wear clothes (to decorate themselves) after getting up in a day. The question is, what to wear? In what

What　　Dependence inversion Principle (DIP): High-level modules should not rely on the underlying module, should be dependent on the abstraction, the abstraction should not depend on the specific, depending on the abstractWhyIf the upper level relies

Original link http://blog.csdn.net/qq_35101189/article/details/70799155In the process of programming, the reader is likely to encounter such a dilemma: the design of an interface, but the implementation of the sub-class interface does not need to

This article reprinted address: http://www.cnblogs.com/iyangyuan/archive/2013/03/11/2954808.htmlIn the process of programming, the reader is likely to encounter such a dilemma: the design of an interface, but the implementation of the sub-class

In the book "Java and Patterns" of Dr. Shanhong, this describes the Flyweight pattern:Flyweight in boxing is the most lightweight, that is, "The fly level" or "rainfall level", where the choice to use the "enjoy meta-mode" of the free translation,

Polymorphic1. Reference polymorphism: 1) a reference to a parent class can point to an object of this class, and 2) a reference to the parent class can point to the object of the child classpublic static void Main (string[] args) {Animal obj1 = new

Definition of decoration Mode: The decorative pattern is the ability to dynamically extend an object without changing the original class file and using inheritance. It is by creating a wrapper object that is decorated to wrap the real object.

Factory mode, instantiating objects, replacing new operations with factory methods.The factory model is basically the same as the simple factory model, where each addition of a subclass in a simple factory must add a judgment branch to the factory

Observer pattern vs. Java delegate The so-called Observer pattern , refers to the need to trigger a series of related actions at the same time, it exists the observer and the notifier two concepts, the notifier holds the observer's abstract

There are many general-purpose rights management systems based on BS, but the privilege management system invoked through the WebService interface is rare. Plus I have done a period of time before the development, feel that a good set of API

Reference from: https://blog.csdn.net/justloveyou_/article/details/55045638 The meaning of existence: object-oriented technology can solve some flexibility or scalability problems, but in many cases, it is necessary to increase the number of

Quote Encyclopedia The builder pattern is a form of design that separates the construction of a complex object from its representation, allowing the same build process to create different representations. Practical Range 1 The algorithms for

How Android implements data sharing between applications. An application can expose its own data completely, it's not important to see how the data is stored by the application, or whether it's using a database or a file, or whether it's online, and

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Factory Method Mode English name Factory Method Pattern definition Defines an interface for creating objects, but subclasses decide which class to instantiate, and the factory method pattern allows the class to defer instantiation to