The technical principles in the Java class library -Introduction to the Technical Principles of Nanning Framework in Java Class Libraares)
The Nanning framework is a technical principle for Java libraries. It provides a set of powerful and flexible tools and functions to develop high -efficiency, scalable and reliable Java applications.This article will introduce the principle of Nanning framework and explain the complete programming code and related configuration when needed.
Background of Nanning framework:
In the development of Java, the use of code can be repeatedly used by using a class library to improve development efficiency.However, the use of the use of libraries requires developers to write the corresponding code according to different needs, which may lead to increased code redundancy, difficult maintenance, and increased system coupling.To solve these problems, Nanning's framework was born.
Principle of Nanning framework:
1. Modular design: Nanning framework adopts modular design, which divides complex applications into multiple independent modules.Each module has a clear functional positioning and can be developed, tested and maintained independently.This design makes applications more scalable, and at the same time facilitates team collaboration and code reuse.
2. Dependent injection: The Nanning framework is decoupled between modules through dependencies injection.By removing the dependency relationship from the code, developers can focus more on the realization of business logic.The dependency injection also reduces the coupling between the modules, which improves the maintenance and testability of the system.
3. AOP programming: The Nanning framework adopts the idea of facing surface programming (AOP), which is decoupled by inserting the code on different cut surfaces to insert the code.This method can be separated from the function of business logic (such as affairs management, log records, etc.) from business code to improve the readability and reuse of code.
4. Configuration file: Nanning framework uses configuration files to manage the behavior of the application.Developers can define the dependence, attribute values and other behavior rules of each module through configuration files.This method makes the configuration of the application more flexible and can be customized according to different needs.
Example code and configuration:
The following is an example code that shows how to use Nanning framework to create a simple Java application:
public class MyApp {
private MyService myService;
public void setMyService(MyService myService) {
this.myService = myService;
}
public void run() {
myService.doSomething();
}
public static void main(String[] args) {
MyApp myApp = new MyApp();
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
myApp.setMyService((MyService) context.getBean("myService"));
myApp.run();
}
}
In the above code, we first define a `MyApp` class that depends on a` MyService` interface.By using the Nanning framework, we can decide the specific implementation of the `MyService` from the application logic.
Next, we created a `ApplicationContext` object in the` main` method, and manages the dependencies between modules through configuration files `ApplicationContext.xml`.`SetmyService` method is used to inject the` myService` instance into the `MyApp`, and then call the` Run` method to execute business logic.
<!-- applicationContext.xml -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="myService" class="com.example.MyServiceImpl" />
</beans>
In the configuration file above, we define a bean of a `myService` tag through the` <bean> `tag, and specify the implementation class of the bean` com.example.myserviceImpl`.
Through the above code and configuration, we can see the powerful features of the modular design, dependency injection, AOP programming and configuration files provided by the Nanning framework.Developers can use these functions to develop efficient, scalable and reliable Java applications based on specific needs.
