02-模拟Junit4功能

package com.day2;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface Test {

}

package com.day2;

public class User {

    @Test
    public void getName()
    {
        System.out.println("刘诗华测试");
    }

    @Test
    public void getTel()
    {
        System.out.println("15390725037");
    }

}

package com.day2;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

public class Junit5 {

    public static void main(String[] args) throws Exception {

        Class clazz = Class.forName("com.day2.User");

        Object obj = clazz.newInstance();

        Method[] list = clazz.getDeclaredMethods();

        List<Method> arr=new ArrayList<>();
        for (Method m : list) {
            boolean b = m.isAnnotationPresent(Test.class);

            if(b)
            {
                arr.add(m);
            }
        }

        for (Method m : arr) {
            m.invoke(obj);
        }

    }

}