In the Java class library, the technical principles of the "Annotations for DS" framework (Technical Principles of Applying The Annotations for DS Framework in Java Class Libraries)

The technical principle of the "Annotations for DS" framework in the Java library Overview: "Annotations for DS" is a framework for Java -class libraries that rely on injection and service search. Using this framework in Java development can simplify the code and improve the maintenance of the code.This article will introduce how to apply the technical principles of the framework in the Java library, including the definition and use of the annotation, as well as related programming code and configuration. Definition and use of annotations: When using the "Annotations for DS" framework, you need to define related annotations to mark the code that needs to be found in injection or service.A commonly used annotation is @component, which is used to mark a class as a component, indicating that this class needs to be injected and dependent.Another commonly used annotation is @Service, which means that a class provides a certain service. For example, we can define a component called "Mycomponent", as shown below: @Component public class MyComponent { // ... } When using this component, you can use the @Autowired annotation mark that the attribute or constructor parameters need to be injected, as shown below: @Component public class AnotherComponent { @Autowired private MyComponent myComponent; // ... } In the configuration file, these components need to be registered so that the framework can correctly rely on injection and service search.Generally, you can use XML or annotation to configure. XML configuration example (in a file called "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"> <context:component-scan base-package="com.example" /> <!-Other configuration-> </beans> Use annotation for configuration example: @Configuration @ComponentScan(basePackages = "com.example") public class AppConfig { // ... } In the code, related dependencies need to be introduced to use the "Annotations for DS" framework. Maven configuration example: <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.3.10</version> </dependency> Gradle configuration example: groovy implementation 'org.springframework:spring-context:5.3.10' After completing the above configuration, the framework will automatically scan and recognize a class marked by @Component or @Service annotation, and perform corresponding dependent injection and service search. in conclusion: By using the "Annotations for DS" framework, the process of dependent injection and service search can be simplified in the Java class library.Just define the relevant annotations and register in the configuration file or code. The framework will automatically complete the relevant operation.This greatly improves the maintenance and readability of the code, and reduces the workload of developers.