Use the "Sticky Metadata Reflective 3" framework in the Java Library to achieve metadata reflection

Use the "Sticky Metadata Reflective 3" framework in the Java Library to achieve metadata reflection In Java development, metadata reflection is a powerful technology that allows us to dynamically obtain and operate metadata information at runtime.Sticky Metadata Reflective 3 (hereinafter referred to as SMR3) is an open source Java class library that provides powerful metadata reflection functions, which can help us more conveniently achieve metadata reflection. Below, we will introduce how to use the SMR3 framework to achieve metadata reflection. First, we need to introduce the related dependencies of the SMR3 framework in the project.You can manage dependencies through Maven or Gradle. For specific dependencies, you can refer to the official document of SMR3. Once we introduce SMR3 dependence, we can start using metadata reflection function.The following is a simple example that demonstrates how to use SMR3 to obtain metadata information: import com.github.stickynotes.SMR3.Metadata; import com.github.stickynotes.SMR3.ReflectiveMetadata; // Define a sample class @Metadata(author = "John", version = 1.0) public class ExampleClass { @ReflectiveMetadata(key = "name", value = "John Smith") private String name; @ReflectiveMetadata(key = "age", value = "30") private int age; // omit other code } public class Main { public static void main(String[] args) { // Use SMR3 to obtain metadata information ReflectiveMetadata reflectiveMetadata = ExampleClass.class.getAnnotation(ReflectiveMetadata.class); System.out.println("Key: " + reflectiveMetadata.key()); // 输出：Key: name System.out.println("Value: " + reflectiveMetadata.value()); // 输出：Value: John Smith // Use SMR3 to get the entire class of metadata information Metadata metadata = ExampleClass.class.getAnnotation(Metadata.class); System.out.println("Author: " + metadata.author()); // 输出：Author: John System.out.println("Version: " + metadata.version()); // 输出：Version: 1.0 } } In the above example, we define an example class ExampleClass and use the SMR3 annotation to set metadata information.We use the author and version number of the class to set the class with the `@Metadata` annotation, and use the field data information of the field name and Age to set the class of the class. In the main method of the main class, we use the `ExampleClass.class.Getannotation (ReflectiveMetadata.class)` to obtain the metadata information of the field name.Then we use the method of `ReflectiveMetAdata.Key () and` ReflectiveMetAdata.Value () `to obtain the key and values of the field name and print it out. Then, we use the `Exampleclass.class.getannotation (Metadata.class)` to obtain the metadata information of the entire class.Then we use the method of `metadata.author () and` metadata.version () `to obtain the author and version number and print it out. Through this example, we can see that it is very simple to use the SMR3 framework to achieve metadata reflection.We only need to add corresponding annotations to the class or field, and then obtain metadata information by calling the corresponding method. I hope that the above content can understand the "Sticky Metadata Reflective 3" framework in the Java class library to help you help!If you have other questions, please continue to ask questions.