Design patterns provide general solutions to specific problems that occur over and over again in software development. By using established design patterns, developers can avoid having to reinvent the wheel each time they encounter a common software development problem. There are three main types of design patterns: creational, structural, and behavioral. Creational design patterns focus on object creation mechanisms, such as Factory and Abstract Factory. Structural design patterns focus on class and object composition, such as Decorator and Adapter. Behavioral design patterns focus on algorithms and the assignment of responsibilities between objects, such as Observer and Mediator. The JEE design pattern services provide a way to implement common software design patterns in a JEE environment. The services make use of JEE features such as Enterprise JavaBeans (EJBs) and JavaServer Pages (JSPs) to provide a comprehensive solution for common software development problems.
There is not much to say about the topic of "jee design pattern services" other than that it is a design pattern used in Java EE applications.
The JEE design pattern services are a great way to improve the performance of your web application. They provide a way to decouple the application logic from the user interface, and to improve the scalability of the application.