j2ee design patterns with examples

in Gof's design patterns:elements of reusable object-oriented software, three classes (creation [abstraction of the instantiation process of a class], structural type [ Describes how to combine a class or object to form a larger structure], behavior [to divide responsibility between different objects and abstract the algorithm]) 23 design patterns, including: abs

". "Include" LinkI divide the "include" relationship into "weak include" and "strong include". The above is "weak include", and the following is "strong include ", this figure shows the differences between the two types of content. "Weak inclusion" and "strong inclusion" are just common examples of me. The academic term is "aggregation" and "Combination". The general information may be confusing to you, I hope you can explain it further. In t

Highlights of design patterns (I) and highlights of design patterns The main document of the design pattern is "big talk Design Pattern". In the first stage, we will first look at the basic concepts of various

Template design patterns are mainly derived from the life of some things are template can be followed. Give two examples of life, such as tea and coffee, and take a look.Tea has the following four steps: 1, boiled water; 2 Put the tea in the Water Cup; 3, pour boiling water; 4, add sugar.Brewed coffee also has the following four steps: 1, boil water; 2 Put the co

() { return _name + ":" + _age; } };})(); 4. inert singleton: object instances can be created only when needed Var getSingle = function (fn) {var result; return function () {return result | (result = fn. apply (this, arguments) ;};}; // test function testSingle () {}getsingle (testSingle) () === getSingle (testSingle) (); // true 5. Supplement: (1) lazy loading var lazyload = function() { console.log(1); lazyload = function() { console.log(2); } return lazyload();}lazyload(); (2)

This article demonstrates the series of Rational tools used in distributed, J2EE-based projects.Article(As listed below. Part 1: Project Introduction and high-level planning Part 1: risk management and demand management 第 3 部分: 模型创建和访问控制；需求分析--> Part 1: model creation and access control; Requirement Analysis Part 1: Refined use cases, production reports, and selection of tools and technologies Part 1: architecture and

Part 1: architecture and design Steven FranklinSoftware designers and Process expertsApril 2004 When this ongoing J2EE sample project using the rational and other rational tools is transformed from a use case to an architecture and design (including data modeling and building a testing design hypothetical prototype

knowledge and J2EE framework knowledge ". There are more and more developers who are familiar with Java, but there are not a few programmers who have been wandering at the language level. There are not many applications that really grasp interfaces or abstract classes in Java. We often say that those technologies are only suitable for large projects, avoid or ignore them. In reality, Java interfaces or abstract classes are the core of the true embodi

knowledge and J2EE framework knowledge ". There are more and more developers who are familiar with Java, but there are not a few programmers who have been wandering at the language level. There are not many applications that really grasp interfaces or abstract classes in Java. We often say that those technologies are only suitable for large projects, avoid or ignore them. In reality, Java interfaces or abstract classes are the core of the true embodi

To correctly use state and policy patterns in Java applications, developers need to be aware of the differences between the two patterns. Although the structure of the state and policy patterns is very similar, they also follow the open and closed principle, representing the solid design principles of the ' O ', but th

abstract factory design model. suppose. this factory has created a series of Dao for customerdao, accountdao, and orderdao, which applies the implementation of factory methods in the factory class generated in the abstract factory. Code Description: The following code illustrates the specific implementation of the DAO design mode:Taking the abstract factory design