The implementation principle of the Scannit framework in the Java library
The Scannit framework is a tool for scanning and loading in the Java library.It provides a convenient way to find and load all classes under specific packages or class paths.This article will introduce the implementation principle of the Scannit framework and explain the complete programming code and related configuration when needed.
The implementation principle of the Scannit framework is as follows:
1. First, the Scannit framework will determine the package or class path that requires scanning according to the configuration.You can configure multiple scanning paths to separate with a comma or segment.
For example, in the Spring Boot project, you can specify the package path that needs to be scanned by setting the bag path that needs to be scanned by setting the bag path that needs to be scanned by setting the patch in the `application.properties` or` application.yaml` configuration file.
2. Next, the Scannit framework will traverse the specified package or class path and scan all the class files in it recursively.It analyzes each class file and obtains the class information.
3. During the class file analysis process, the Scannit framework will obtain the annotation information of the class.It checks whether there is a specific annotation mark on the target class.These annotations can provide additional instructions to filter out classes that meet specific conditions.
For example, in the Spring framework, you can use the `@componentscan` annotation to specify the package path to be scanned, and use the class that needs to be managed by the Spring container.
4. The Scannit framework loads the qualified class to the memory and returns a list of a class object.These class objects can be further used for instantiated objects, calling methods, and other operations.
Here are a simple example code that uses the Scannit framework:
import com.github.jcustenborder.scannit.Scanner;
Scanner scanner = new Scanner();
List<Class<?>> classes = scanner.scan("com.example.package");
for (Class<?> clazz : classes) {
System.out.println("Found class: " + clazz.getName());
}
In the above example, we created a `Scanner` object and specified the bag path to scan through the` Scan` method.Then, we traversed the list of objects returned and printed out the names of each class.
It should be noted that the use of the Scannit framework can also be combined with other frameworks and tools, such as the Spring framework, Hibernate, etc. to better achieve class scanning and loading.
To sum up, the Scannit framework is a tool for achieving class scanning and loading in the Java class library.It screened qualified classes by analyzing class files and annotation information, and returned a list of class objects.By understanding the implementation principle of the Scannit framework, we can use it flexibly in the project to achieve customized scanning and loading functions.