NullPointerException - implementando Criptografia

pessoal, estou implementando uma criptografia usando MD5. essas sao minhas classes.

meu bean:

essa classe é responsavel pela criptografia:

public class Criptografia {

private static MessageDigest md = null;

static {

try {

md = MessageDigest.getInstance("MD5");

} catch (NoSuchAlgorithmException ex) {

ex.printStackTrace();

}

private static char[] hexCodes(byte[] text) {

char[] hexOutput = new char[text.length * 2];

String hexString;

for (int i = 0; i < text.length; i++) {

hexString = "00" + Integer.toHexString(text[i]);

hexString.getChars(hexString.length() - 2,

hexString.length(), hexOutput, i * 2);

}

return hexOutput;

}

public static String criptografar(String pwd) {

if (md != null) {

return new String(hexCodes(md.digest(pwd.getBytes())));

}

return null;

}

public static void main(String[] args) {

String senha = "01032007";
		String senhaJava = "8af8f524ef3227a5fb918a2332aab7f1";
		String senhaDelphi = "8af8f524ef3227a5fb918a2332aab7f1";

if (senhaJava.equals(senhaDelphi)) {

System.out.println("Senha Java / Delphi iguais.");

} else {
			System.out.println("Errro Senha Java /Delphi");
		}

System.out.println(Criptografia.criptografar(senha));
		// System.out.println(Criptografia.desCript(senhaCript));

}
}

o erro:

01/10/2007 14:50:58 com.sun.faces.application.ApplicationAssociate createAndMaybeStoreManagedBeans
SEVERE: JSF1001: Managedbean loginManager could not be created.
01/10/2007 14:50:58 com.sun.faces.lifecycle.LifecycleImpl phase
WARNING: executePhase(RENDER_RESPONSE 6,com.sun.faces.context.FacesContextImpl@1c80fae) threw exception
javax.faces.FacesException: javax.faces.FacesException: Cant instantiate class: br.com.fitsistemas.manager.LoginManager.. null
	at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:541)
	at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:82)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
	at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
	at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:61)
	at org.apache.el.parser.AstValue.getValue(AstValue.java:103)
	at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:101)
	at javax.faces.component.UIOutput.getValue(UIOutput.java:173)
	at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:189)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:320)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:200)
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:833)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:896)
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
	at com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:244)
	at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:175)
	at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:147)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:256)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:362)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:488)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
Caused by: javax.faces.FacesException: Cant instantiate class: br.com.fitsistemas.manager.LoginManager.. null
	at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:282)
	at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:531)
	... 43 more
Caused by: java.lang.NullPointerException
	at br.com.fitsistemas.Criptografia.criptografar(Criptografia.java:48)
	at br.com.fitsistemas.manager.LoginManager.<init>(LoginManager.java:15)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:355)
	at java.lang.Class.newInstance(Class.java:308)
	at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:277)
	... 44 more
01/10/2007 14:50:58 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException
	at br.com.fitsistemas.Criptografia.criptografar(Criptografia.java:48)
	at br.com.fitsistemas.manager.LoginManager.<init>(LoginManager.java:15)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:355)
	at java.lang.Class.newInstance(Class.java:308)
	at com.sun.faces.config.ManagedBeanFactoryImpl.newInstance(ManagedBeanFactoryImpl.java:277)
	at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:531)
	at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:82)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
	at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
	at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:61)
	at org.apache.el.parser.AstValue.getValue(AstValue.java:103)
	at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:101)
	at javax.faces.component.UIOutput.getValue(UIOutput.java:173)
	at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:189)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:320)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:200)
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:833)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:896)
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
	at com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:244)
	at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:175)
	at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
	at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:147)
	at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:256)
	at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:362)
	at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:488)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)

agradeço desde já a atenção de todos.

[],s

This message was edited 1 time. Last update was at 26/06/2008 14:02:37

O atributo senha está nulo, não está?
portanto pwd.getBytes() vai lançar NullPointerException ...

Alguma coisa naquela linha está nula.

Não deve ser o objeto md por causa daquele if.
Talvez seja o resultado do pwd.getBytes() ou do método hexCodes.

Teste o valor disso com o debbuger.

Pessoal,

aproveitando esse tópico, alguem me sabe dizer o q faz o método hexcodes?

teh mais!

Notícias, artigos e o maior fórum brasileiro sobre Java