在批注处理器中获取变量的类型

import java.lang.reflect.Field;

public class ReflectionExample {
    private int number;
    private String text;

    public static void main(String[] args) throws NoSuchFieldException {
        Class<?> clazz = ReflectionExample.class;

        Field numberField = clazz.getDeclaredField("number");
        System.out.println("Type of 'number': " + numberField.getType());

        Field textField = clazz.getDeclaredField("text");
        System.out.println("Type of 'text': " + textField.getType());
    }
}

Type of 'number': int
Type of 'text': class java.lang.String

import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.TypeMirror;
import java.util.Set;

@SupportedAnnotationTypes("com.example.MyAnnotation")
@SupportedSourceVersion(SourceVersion.RELEASE_8)
public class MyAnnotationProcessor extends AbstractProcessor {

    @Override
    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        for (Element element : roundEnv.getElementsAnnotatedWith(MyAnnotation.class)) {
            TypeMirror type = element.asType();
            System.out.println("Annotated element type: " + type);
        }
        return true;
    }
}