The technical principle inquiry of the technical principles of the "Ickenham 'framework in the Java class library

'Ickenham' framework is a lightweight open source framework written in Java to simplify and accelerate the development and deployment process of Java applications.This article will study the technical principles of the 'Ickenham' framework and provide some Java code examples. Overview of technical principles: 'Ickenham' framework is based on a series of design models and best practices to provide a simple, flexible and efficient programming environment.It mainly focuses on the following functions: 1. Dependency Injection: By dependent injection technology, the dependency relationship between 'Ickenham' can automatically manage objects.By injecting dependencies, developers can reduce the workload of manual creation objects and improve the testability and maintenance of code. The following is a simple example that demonstrates the dependency injection function of 'Ickenham': public class UserService { @Inject private UserRepository userRepository; // ... } In the above examples, the `userService` class is injected into it through the`@inject` annotation.In this way, developers do not need to manually instantiate dependencies, but automatically complete the injection through the framework. 2. ASPECT-OrIiented Programming: 'Ickenham' framework supports cutting programming, and the upcoming cross-section attention point is separated from the core business logic.Through cutting surface, developers can centrally process logo and transaction management, etc., to improve the maintenance and scalability of the application. The following is an example of showing 'Ickenham' cutting programming: @Aspect public class LoggingAspect { @Before("execution(* com.example.service.*.*(..))") public void logBefore(JoinPoint joinPoint) { System.out.println("Before method: " + joinPoint.getSignature().getName()); } } In the above examples, the `loggingaspect` class uses the`@aspect` annotation to define a cut surface.`@Before` Note indicates that the` LogBeFore` method is performed before the cut method is executed.In this way, we can realize the demand for logging before the method execution. 3. Data Persistence: 'Ickenham' framework provides the function of simplifying database operations, making the development of the data access layer easier and efficient.Developers can use annotations and configurations to define the mapping relationship between the physical class and the database table, and use the built -in ORM (object relationship mapping) mechanism to achieve the durable and retrieval of data. Here are examples of displaying data with 'Ickenham' for data persistence: @Entity @Table(name = "users") public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @Column(name = "name") private String name; // ... } In the above examples, the `user` class defines the structure and field mapping of the data table through the annotations such as`@Entity`,@Table`, `@ID` and@column`. Summary: The 'Ickenham' framework has greatly simplified the development and maintenance of Java applications by relying on the technical principles such as injection, cutting surface programming and data persistence.By using 'Ickenham', developers can reduce repetitive work and improve the readability and maintenance of code.