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index.zulzul<zk>
<window border="normal" title="hello" apply="pkg$.TestComposer">
<div><label value="Dirección IP:"/><textbox id="txtIp"/><label value="Rango: 192.168.0.1 - 192.168.1.255"/><button id="btn" label="Validar" /></div>
</window>
</zk>
TestComposer.javajavaimport org.zkoss.zk.ui.*;
import org.zkoss.zk.ui.event.*;
import org.zkoss.zk.ui.util.*;
import org.zkoss.zk.ui.ext.*;
import org.zkoss.zk.au.*;
import org.zkoss.zk.au.out.*;
import org.zkoss.zul.*;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TestComposer extends GenericForwardComposer{
private Textbox txtIp;
private static final String EXP_REGULAR_IP_VALIDA = "^(([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$";
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
}
public void onClick$btn(Event e) throws InterruptedException{
if(validarIP()){
if(isRango("192.168.0.1","192.168.1.255")){
Messagebox.show("La direccion IP "+txtIp.getValue()+" está en el rango permitido");
} else {
Messagebox.show("La direccion IP "+txtIp.getValue()+" no está en el rango permitido");
}
} else {
Messagebox.show("La direccion IP no es válida");
}
}
private boolean validarIP(){
Pattern pattern = Pattern.compile(EXP_REGULAR_IP_VALIDA);
Matcher matcher = pattern.matcher(txtIp.getValue());
if(matcher.matches()){
return true;
}
return false;
}
private boolean isRango(String ipInicial, String ipFinal){
boolean siValida = false;
try{
long nIpInicial = convertirIp(InetAddress.getByName(ipInicial));
long nIpFinal = convertirIp(InetAddress.getByName(ipFinal));
long nIpUsuario = convertirIp(InetAddress.getByName(txtIp.getValue()));
siValida = nIpUsuario >= nIpInicial && nIpUsuario <= nIpFinal;
} catch(UnknownHostException e){
;
}
return siValida;
}
private long convertirIp(InetAddress ip){
long resultado = 0;
byte[] octetos = ip.getAddress();
for(byte octeto : octetos){
resultado <<= 8;
resultado |= octeto & 0xff;
}
return resultado;
}
}