url编程.txt

从IP地址得到HOSTNAME的一段JAVA程序。非常简单。无解压密码

Tips 
1. Compile: javac GetHost 
2. Run: java GetHost 111.111.111.1(your IP or others) 
import java.io.*; 
import java.net.*; 
// 
// 
// GetHost.java 
// 
// 
public class GetHost 
{ 
public static void main (String arg[]){ 
if (arg.length>=1){ 
InetAddress[] Inet; 
int i=1; 
try{ 
for (i=1;i<=arg.length;i++){ 
Inet = InetAddress.getAllByName(arg[i-1]); 
for (int j=1;j<=Inet.length;j++){ 
System.out.print(Inet[j-1].toString()); 
System.out.print("n"); 
} 
} 
} 
catch(UnknownHostException e){ 
System.out.print("Unknown HostName!"+arg[i-1]); 
} 
} 
else{ 
System.out.print("Usage java/jview GetIp "); 
} 
} 
} 



Example 2 
download now 
//GetHTML.java 
/** 
* This is a program which can read information from a web server. 
* @version 1.0 2000/01/01 
* @author jdeveloper 
**/ 
import java.net.*; 
import java.io.*; 

public class GetHTML { 
public static void main(String args[]){ 
if (args.length < 1){ 
System.out.println("USAGE: java GetHTML httpaddress"); 
System.exit(1); 
} 
String sURLAddress = new String(args[0]); 
URL url = null; 
try{ 
url = new URL(sURLAddress); 
}catch(MalformedURLException e){ 
System.err.println(e.toString()); 
System.exit(1); 
} 
try{ 
InputStream ins = url.openStream(); 
BufferedReader breader = new BufferedReader(new InputStreamReader(ins)); 
String info = breader.readLine(); 
while(info != null){ 
System.out.println(info); 
info = breader.readLine(); 
} 
} 
catch(IOException e){ 
System.err.println(e.toString()); 
System.exit(1); 
} 
} 
}