Proxy.newProxyInstance()创建proxy

GitHub Code: feat: java.lang.reflect里的方法Proxy.newProxyInstance()创建proxy

java.lang.reflect自带的方法Proxy.newProxyInstance()创建proxy

public class ArithmeticCalculatorLogProxy {

    private ArithmeticCalculatorService target;

    public ArithmeticCalculatorLogProxy(ArithmeticCalculatorService target) {
        this.target = target;
    }


    public ArithmeticCalculatorService getProxy() {
        ClassLoader classLoader = target.getClass().getClassLoader();
        Class[] interfaces = new Class[]{ArithmeticCalculatorService.class};

        InvocationHandler handler = new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                System.out.println("method:" + method.getName() + ", args=" + Arrays.toString(args));
                Object result = method.invoke(target, args);
                System.out.println("method:" + method.getName() + ", result=" + result);
//                System.out.println(proxy);  // 打印这个会StackOverflowError
                return result;
            }
        };

        ArithmeticCalculatorService proxy = (ArithmeticCalculatorService)Proxy.newProxyInstance(classLoader, interfaces, handler);
        return proxy;
    }

}