How to use the Scannotation framework to quickly scan the Java class
How to use the Scannotation framework to quickly scan the Java class
Scannotation is a lightweight framework used to quickly scan the Java class.It is implemented based on Java's reflection mechanism, which can quickly analyze and scan the category in the bag and its sub -bag.This article will introduce how to use the Scannotation framework to quickly scan the Java class and provide some Java code examples.
1. First, we need to add Scannotation to our project.You can download the jar file of Scannotation through Maven or manually and add it to the project.
2. Create a Java class to demonstrate how to use the Scannotation framework for class scanning.We will implement a simple example in this class.
import com.google.common.reflect.ClassPath;
import org.scannotation.AnnotationDB;
import java.io.IOException;
import java.util.Set;
public class ClassScanner {
public static void main(String[] args) {
// Define the package path to be scanned
String packagePath = "com.example";
try {
// Create an AnnotationDB object
AnnotationDB annotationDB = new AnnotationDB();
// Scan the class in the specified package and its sub -bag
annotationDB.scanArchives(ClassScanner.class.getResource(packagePath));
// Get all scanned classes containing annotations
Set<String> annotatedClasses = annotationDB.getAnnotationIndex().keySet();
// Class scanned by the traversal output
for (String className : annotatedClasses) {
System.out.println(className);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
In the above sample code, we first define the package path to be scanned. Here, it is assumed that "com.example" is assumed.Then, we created an AnnotationDB object and scanned the specified package and its subcontae through its `Scanarchives` method.Finally, we obtained all scanned classes through AnnotationDb's `GetannotationINDEX` method, and traversed out the name of these classes.
3. Run the above example code, and quickly scan all the Java classes in the specified package and its sub -bags and output class names.
Use the Scannotation framework to easily achieve fast Java scanning.It can help us get and process category information during runtime, such as finding classes marked by specific annotations.Through the above code example, you can easily start using the Scannotation framework for fast scanning of the Java class.
