How to use the reflection Framework Reflections in Java

Today, the editor will share with you the relevant knowledge points about how to use the reflective framework Reflections in Java. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look.

Using Reflections, you can easily obtain the following metadata information:

1) get all the subclasses of a type; for example, one parent class is TestInterface, and you can get all the subclasses of TestInterface.

2) get all types / field variables of an annotation, and support the matching of annotation parameters.

3) use regular expressions to get all matching resource files

4) get a specific signature method.

The common uses are:

Introduce the dependency jar org.reflections reflections 0.9.10 project to use: / / initialize the utility class Reflections reflections = new Reflections (new ConfigurationBuilder (). ForPackages (basePackages) .addScents (new SubTypesScanner ()). AddScanners (new FieldAnnotationsScanner (); / / get the class Set corresponding to the type comments under a package