SpringAOP中代理模式的动态代理的JDK动态代理代码如何编写？

public class DynamicProxyHandler implements InvocationHandler {

    private Object target;
    public DynamicProxyHandler(Object target){
        this.target = target;
    }
    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        long startTime = System.currentTimeMillis();
        Object result = method.invoke(this.target, args);
        long endTime = System.currentTimeMillis();
        long responseTime = endTime - startTime;
        System.out.println("接口响应时间："+responseTime);
        return result;
    }
}