class class1 { public static void Main(string[] args) { Person ps = new Person(); ps.KouLan(); IFlyable fly = new Person(); fly.KouLan(); Console.ReadKey(); } } public class Person : IFlyable { public void KouLan() { Console.WriteLine("wo hui kou lan
创建maven项目时pom.xml时: 出现如下报错信息: Failure to transfer commons-lang:commons-lang:jar:2.1 from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or u