注解的应用：模拟junit框架

package annotation;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * FileName: AnnotationDemo02
 * Author:   lps
 * Date:     2022/4/23 14:18
 * Sign:刘品水 Q：1944900433
 */
public class AnnotationDemo02 {


    public void test1() {
        System.out.println("====test1====");
    }
    @MyTest
    public void test2() {
        System.out.println("====test2====");
    }

    @MyTest
    public void test3() {
        System.out.println("====test3====");
    }

    /**
     * 启动菜单：有注解的被调用
     */
    public static void main(String[] args) throws InvocationTargetException, IllegalAccessException {
        AnnotationDemo02 t = new AnnotationDemo02();
        Class<AnnotationDemo02> c = AnnotationDemo02.class;
        Method[] methods = c.getDeclaredMethods();
        for (Method method : methods) {
            if (method.isAnnotationPresent(MyTest.class)){
                method.invoke(t);
            }
        }

    }
}

package annotation;

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

/**
 * FileName: MyTest
 * Author:   lps
 * Date:     2022/4/23 14:10
 * Sign:刘品水 Q：1944900433
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MyTest {

}