Java8注解新增两个主要特性，一个类型注解，目前没看到什么用，留着再研究吧（坏习惯！），另一个就是我要说的这个新特性Repeatable感觉棒棒的，可以一次传好多值啦。来看我的这个 Demo

###code

public class RepeatableAnnotationDemo {    public static void main(String[] args) {        testRepeatable();    }    @myAnno(str = "hs", size = 2)    @myAnno(str = "Ys", size = 1)    @myAnno(str = "zs", size = 3)    public static void testRepeatable() {        try {            Class
     clazz = Class.forName("Book.RepeatableAnnotationDemo");            Method method = clazz.getMethod("testRepeatable");            RepeatableAnno annotation = method.getAnnotation(RepeatableAnno.class);            System.out.println(annotation);            myAnno[] annos1 = annotation.value();            for (myAnno anno : annos1) {                System.out.println(anno + "->size:" + anno.size() + "　str：" + anno.str());            }            System.out.println("------------------------------------------------");            myAnno[] annos = method.getAnnotationsByType(myAnno.class);            for (myAnno anno : annos) {                System.out.println(anno + "->size:" + anno.size() + "　str：" + anno.str());            }        } catch (ClassNotFoundException e) {            e.printStackTrace();        } catch (NoSuchMethodException e) {            e.printStackTrace();        }    }}@Retention(RetentionPolicy.RUNTIME)@Repeatable(RepeatableAnno.class)@interface myAnno {    String str() default " ";    int size() default 0;}@Retention(RetentionPolicy.RUNTIME)@interface RepeatableAnno {    myAnno[] value();}

@Book.RepeatableAnno(value=[@Book.myAnno(size=2, str=hs), @Book.myAnno(size=1, str=Ys), @Book.myAnno(size=3, str=zs)])@Book.myAnno(size=2, str=hs)->size:2　str：hs@Book.myAnno(size=1, str=Ys)->size:1　str：Ys@Book.myAnno(size=3, str=zs)->size:3　str：zs------------------------------------------------@Book.myAnno(size=2, str=hs)->size:2　str：hs@Book.myAnno(size=1, str=Ys)->size:1　str：Ys@Book.myAnno(size=3, str=zs)->size:3　str：zs