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Java URL編程

來源:互聯網網民  2008-05-31 12:10:41  評論

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("

");

}

}

}

catch(UnknownHostException e){

System.out.print("Unknown HostName!"+arg[i-1]);

}

}

else{

System.out.print("Usage java/jview GetIp <hostname>");

}

}

}

</pre>

</p>

<p>

<pre>

<font color=red>Example 2</font>

<a href="GetHtml.java">download now</a>

//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){

 
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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(" "); } } } catch(UnknownHostException e){ System.out.print("Unknown HostName!"+arg[i-1]); } } else{ System.out.print("Usage java/jview GetIp <hostname>"); } } } </pre> </p> <p> <pre> <font color=red>Example 2</font> <a href="GetHtml.java">download now</a> //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){
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