进阶day12-自定义简单的Junit框架

javaSE-day12/src/com/inmind/annotation03/JunitDemo10.java

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+package com.inmind.annotation03;
+
+public class JunitDemo10 {
+
+    public void method1(){
+        System.out.println("测试方法1执行了");
+    }
+
+    @MyTest
+    public void method2(){
+        System.out.println("测试方法2执行了");
+    }
+
+    @MyTest
+    public void method3(){
+        System.out.println("测试方法3执行了");
+    }
+}

javaSE-day12/src/com/inmind/annotation03/JunitTest10.java

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+package com.inmind.annotation03;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/*
+junit测试框架简单实现
+注解（自定义注解）+反射（识别注解+解析注解）
+
+实现步骤：
+1.自定义注解 @MyTest
+2.反射获取所有的带有该注解的方法让他们执行
+ */
+public class JunitTest10 {
+    public static void main(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, InstantiationException {
+        //获取测试类的Class对象
+        Class<JunitDemo10> clazz = JunitDemo10.class;
+        //获取JunitDemo10所有的方法
+        Method[] methods = clazz.getMethods();
+        System.out.println(methods.length);
+        //遍历判断每个方法对象上是否有@MyTest注解
+        for (Method method : methods) {
+            boolean flag = method.isAnnotationPresent(MyTest.class);
+            if (flag) {
+                method.invoke(clazz.getConstructor().newInstance());
+            }
+        }
+    }
+}

javaSE-day12/src/com/inmind/annotation03/MyTest.java

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+package com.inmind.annotation03;
+
+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 MyTest {
+}