Try this.
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
/**
* The client side stub for the RPC service.
*/
@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {
String getImage(String name) throws IllegalArgumentException;
}// end GreetingService
##############################################################################
/**
* The async counterpart of <code>GreetingService</code>.
*/
public interface GreetingServiceAsync {
void getImage(String input, AsyncCallback<String> callback)
throws IllegalArgumentException;
}// end GreetingServiceAsync
##############################################################################
package testes.gwt.server;
import java.io.FileInputStream;
import sun.misc.BASE64Encoder;
import testes.gwt.client.GreetingService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
/**
* The server side implementation of the RPC service.
*/
public class GreetingServiceImpl extends RemoteServiceServlet implements
GreetingService {
private static final long serialVersionUID = -7242788956943039085L;
public String getImage(String input) throws IllegalArgumentException {
try {
BASE64Encoder base64Encoder = new BASE64Encoder();
FileInputStream fileInputStream = new
FileInputStream("myImage");
byte[] buffer = new byte[fileInputStream.available()];
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("data:image/png;base64,");
fileInputStream.read(buffer);
stringBuilder.append(base64Encoder.encode(buffer));
return stringBuilder.toString();
} catch (Exception e) {
e.printStackTrace();
}// end catch
return null;
}// end getImage
}// end GreetingServiceImpl
##############################################################################
public void onFailure(Throwable caught) {}
public void onSuccess(String result) {
if (!img.isVisible())
img.setVisible(true);
img.getElement().setPropertyObject("src", result);
} // end onSuccess
--
Professor Vagner
O PLANETA É O MEU PAÍS, E A CIÊNCIA É A MINHA RELIGIÃO ! INDO AO INFINITO E
ALÉM... !!!!!!
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