Predefined Annotation TypesA set of annotation types are predefined in the Java SE API. Some annotation types are used by the Java compiler, and some apply to other annotations. Annotation Types Used by the Java Language The predefined annotation types defined in java.lang are @Deprecated, @...
1) 简单类型:这种annotation只能用于其它code,不能用于annotation 类型。 2)Meta Annotation: 这种annotation是用于annotation type的,也就是annotation of annotation. Out-of-the-box Simple Annotation Types in JDK JDK提供了3个简单类型的annotations, 包括: 1) Override @Target(ElementType.METHOD) @Retention(Rete...
java.lang.Override是一个Marker Annotation,简单地说就是用于标示的Annotation,Annotation 名称本身表示了要给工具程序的信息。 Annotation类型与Annotation实际上是有区分的,Annotation是Annotation类型的实例,例如 @Override是个Annotation,它是java.lang.Override类型的一个实例,一个文件中可以有很多 个@Override,但它们都...
public Set<String> getSupportedAnnotationTypes() { Set<String> types = new LinkedHashSet<String>(); types.add(SetHandler.class.getCanonicalName()); types.add(GetHandler.class.getCanonicalName()); return types; } @Override public SourceVersion getSupportedSourceVersion() { return SourceVersion.l...
通过signature可以获取名称getName() 和参数类型getParameterTypes() getTarget()获取目标类: Class<?> clazz = joinPoint.getTarget().getClass(); 如果被切的类 是 被别的切面切过的类,可以使用AopUtils.getTargetClass获取一个数组,再从数组中找你期望的类。
More information about annotation types can be found in section 9.6 of The Java™ Language Specification. The AnnotatedElement interface discusses compatibility concerns when evolving an annotation type from being non-repeatable to being repeatable....
Types 类型 TypeAnnotation 类型标注Version: 3.1 TypeAnnotation 类型标注 用于标注数据结构属性、逻辑的输入参数、输出参数、局部变量等概念的类型。 可以是用户自行选择的,也可以是 LanguageServer 推断的。 结构声明 TS Declaration Java Class JSON Schema interface TypeAnnotation { "concept": "TypeAnnotation",...
Annotation The common interface extended by all annotation types. Enum Summary EnumDescription ElementType The constants of this enumerated type provide a simple classification of the syntactic locations where annotations may appear in a Java program. RetentionPolicy Annotation retention policy. Exception Summ...
元注解的作用就是负责注解其他注解,Java 5.0定义了4个meta-annotation类型,用来提供对爱他的 annotation 类型做说明。 java.lang.annotation @Target @Retention @Document @Inhrited @Target 修饰的对象范围:packages、types(类、接口、枚举、Annotation类型)、类型成员(...
@Documented@Target(TYPE)@Retention(RUNTIME) public @interfaceSupportedAnnotationTypes 用于指示注释处理器支持的注释类型的注释。Processor.getSupportedAnnotationTypes()方法可以根据此批注的值构造其结果,如AbstractProcessor.getSupportedAnnotationTypes()所述。应仅使用strings conforming to the grammar作为值。