CachingMetadataReaderFactory

此类旨在获取类的元信息而存在。需要与ResourceLoaderAware配合使用

public void setResourceLoader(ResourceLoader resourceLoader) {
        CachingMetadataReaderFactory factory = new CachingMetadataReaderFactory(resourceLoader);
        try {
            MetadataReader metadataReader = factory.getMetadataReader(PolystarApplication.class.getName());
            AnnotationMetadata annotationMetadata = metadataReader.getAnnotationMetadata();
            ClassMetadata classMetadata = metadataReader.getClassMetadata();
            System.out.println(annotationMetadata);
            System.out.println(classMetadata);
            for (String annotationType : annotationMetadata.getAnnotationTypes()) {
                System.out.println(annotationMetadata.getMetaAnnotationTypes(annotationType));
                System.out.println(annotationMetadata.getAllAnnotationAttributes(annotationType));
            }
            System.out.println(JSON.toJSON(classMetadata));
            AnnotationMetadataReadingVisitor visitor = (AnnotationMetadataReadingVisitor) annotationMetadata;
        } catch (IOException e) {
            e.printStackTrace();
        }
    }