关于java:java注解

记录一下本人应用注解获取的过程

// 第一步： 定义注解@Target(ElementType.METHOD)@Retention(RetentionPolicy.RUNTIME)public @interface SimpleAnnotation {    String value();}// 第二步：应用在办法上public class UseAnnotation {    @SimpleAnnotation(value = "testStringValue")    public void testMethod(){    }}// 第三步：获取哪些办法应用了public class LogicMain {    public static void main(String[] args) {        Class<UseAnnotation> useAnnotationClass = UseAnnotation.class;        for (Method method : useAnnotationClass.getMethods()) {            SimpleAnnotation annotation = method.getAnnotation(SimpleAnnotation.class);            if (null != annotation) {                System.out.println(" Method Name : " + method.getName());                System.out.println(" value : " + annotation.value());            }        }    }}

输入后果:
Method Name : testMethod
value : testStringValue

// 第一步：定义注解@Inherited@Retention(RetentionPolicy.RUNTIME)public @interface MyAnnotation {    String value() default "hello";}// 第二步：父类上应用，子类继承这个类@MyAnnotationpublic class Person {}class Student extends Person{}// 第三步：获取public class TestAnnotation {    public static void main(String[] args) {        Class<Student> clazz = Student.class;        Annotation[] annotations = clazz.getAnnotations();        for (Annotation annotation : annotations) {            System.out.println(annotation);        }    }}

输入后果：
@com.zcl.edu.annotation2.MyAnnotation(value="hello")