AnnotationTest.java

package com.alibaba.json.bvt.annotation;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import junit.framework.TestCase;
import sun.reflect.annotation.AnnotationType;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Iterator;
import java.util.Map;

/**
 * Created by Helly on 2017/04/10.
 */
public class AnnotationTest extends TestCase {

    public void test_annoation() throws Exception {
        Bob bob = new Bob("Bob", 30, true);
//        JSONObject obj = (JSONObject) JSON.toJSON(bob);
//        assertEquals(3, obj.size());
//        assertEquals(Boolean.TRUE, obj.get("sex"));
//        assertEquals("Bob", obj.get("name"));
//        assertEquals(new Integer(30), obj.get("age"));

        PersonInfo info = Bob.class.getAnnotation(PersonInfo.class);
        JSONObject obj = (JSONObject) JSON.toJSON(info);

        assertEquals(3, obj.size());
        assertEquals(Boolean.TRUE, obj.get("sex"));
        assertEquals("Bob", obj.get("name"));
        assertEquals(new Integer(30), obj.get("age"));
    }

    @PersonInfo(name = "Bob", age = 30, sex = true)
    public static class Bob implements Person {
        private String name;
        private int age;
        private boolean sex;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public int getAge() {
            return age;
        }

        public void setAge(int age) {
            this.age = age;
        }

        public boolean isSex() {
            return sex;
        }

        public void setSex(boolean sex) {
            this.sex = sex;
        }

        public Bob() {
        }

        public Bob(String name, int age, boolean sex) {
            this();
            this.name = name;
            this.age = age;
            this.sex = sex;
        }

        public void hello() {
            System.out.println("world");
        }
    }

    @Retention(RetentionPolicy.RUNTIME)
    @Target(ElementType.TYPE)
    public static  @interface PersonInfo {
        String name();
        int age();
        boolean sex();
    }


    public static interface Person {
        void hello();
    }

}