使用java简单模拟ping和telnet的实现

一.模拟ping的实现

利用InetAddress的isReachable方法可以实现ping的功能，里面参数设定超时时间，返回结果表示是否连上。

try ... {
InetAddressaddress=InetAddress.getByName("192.168.0.113");
System.out.println(address.isReachable(5000));
} catch (UnknownHostExceptione) ... {
e.printStackTrace();
} catch (IOExceptione) ... {
e.printStackTrace();
}

二.模拟telnet的实现

利用Socket的connect(SocketAddress endpoint, int timeout)方法可以实现telnet的功能，如果catch到异常说明telnet失败

Socketserver = null ;
try ... {
server=newSocket();
InetSocketAddressaddress=newInetSocketAddress("192.168.0.201",8899);
server.connect(address,5000);
} catch (UnknownHostExceptione) ... {
System.out.println("telnet失败");
} catch (IOExceptione) ... {
System.out.println("telnet失败");
} finally ... {
if(server!=null)
try...{
server.close();
}catch(IOExceptione)...{
}
}