url编程.txt

Java源码：URL编程

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);  
}  
}  
}