fix test

hutool-core/src/main/java/org/dromara/hutool/core/annotation/AnnotationUtil.java

@@ -291,15 +291,8 @@ public class AnnotationUtil {
 	public static ElementType[] getTargetType(final Class<? extends Annotation> annotationType) {
 		final Target target = annotationType.getAnnotation(Target.class);
 		if (null == target) {
-			return new ElementType[]{ElementType.TYPE, //
-					ElementType.FIELD, //
-					ElementType.METHOD, //
-					ElementType.PARAMETER, //
-					ElementType.CONSTRUCTOR, //
-					ElementType.LOCAL_VARIABLE, //
-					ElementType.ANNOTATION_TYPE, //
-					ElementType.PACKAGE//
-			};
+			// 如果没有定义@target元注解，则表示支持所有节点
+			return ElementType.values();
 		}
 		return target.value();
 	}

hutool-core/src/main/java/org/dromara/hutool/core/annotation/elements/HierarchicalAnnotatedElements.java

@@ -14,6 +14,7 @@ package org.dromara.hutool.core.annotation.elements;
 
 import org.dromara.hutool.core.annotation.AnnotationUtil;
 import org.dromara.hutool.core.collection.CollUtil;
+import org.dromara.hutool.core.collection.set.SetUtil;
 import org.dromara.hutool.core.reflect.ClassUtil;
 import org.dromara.hutool.core.reflect.method.MethodUtil;
 import org.dromara.hutool.core.text.CharSequenceUtil;
@@ -274,13 +275,13 @@ public class HierarchicalAnnotatedElements implements AnnotatedElement, Iterable
 	// ========================= protected =========================
 
 	/**
-	 * 获取当前元素及层级结构中的关联元素的映射对象
+	 * 获取当前元素及层级结构中的关联元素的映射对象，结果只读
 	 *
 	 * @return 元素映射对象
 	 */
-	protected final Set<AnnotatedElement> getElementMappings() {
+	public final Set<AnnotatedElement> getElementMappings() {
 		initElementMappingsIfNecessary();
-		return elementMappings;
+		return SetUtil.view(this.elementMappings);
 	}
 
 	/**

hutool-core/src/main/java/org/dromara/hutool/core/annotation/elements/MetaAnnotatedElement.java

@@ -82,7 +82,7 @@ public class MetaAnnotatedElement<T extends AnnotationMapping<Annotation>> imple
 	 * @param element        被注解元素
 	 * @param mappingFactory 创建{@link AnnotationMapping}的工厂方法，返回值为{@code null}时将忽略该注解
 	 */
-	MetaAnnotatedElement(final AnnotatedElement element, final BiFunction<T, Annotation, T> mappingFactory) {
+	public MetaAnnotatedElement(final AnnotatedElement element, final BiFunction<T, Annotation, T> mappingFactory) {
 		this.element = Objects.requireNonNull(element);
 		this.mappingFactory = Objects.requireNonNull(mappingFactory);
 		// 等待懒加载

hutool-core/src/main/java/org/dromara/hutool/core/annotation/package-info.java

@@ -11,7 +11,13 @@
  */
 
 /**
- * 注解包，提供增强型注解和注解工具类
+ * 注解包，提供增强型注解和注解工具类，处理包括：<br>
+ * <ul>
+ *     <li>注解元素（AnnotatedElement）上的注解。</li>
+ *     <li>父元素上的注解（包括类、接口、方法、属性）。</li>
+ *     <li>注解上的注解。</li>
+ *     <li>父元素上的注解上的注解。</li>
+ * </ul>
  *
  * @author looly
  *