AspectJ HelloWorld

安装好aspectj的和环境后，编写HelloWorld：

/**
 * HelloWorld.java
 */
public class HelloWorld {
    private void sayHello() {
        System.out.println("hello world");
    }

    public static void main(String[] args) {
        System.out.println("main start...");
        HelloWorld hello = new HelloWorld();
        hello.sayHello();
        System.out.println("main end...");
    }
}

/**
 * HelloAspect.aj
 */
public aspect HelloAspect {
    void around() : call(void sayHello()) {
        System.out.println("before sayHello");
		proceed();
		System.out.println("after sayHello");
    }
}