Acessando WS da Sefaz para NF-e

AcessaWsDaSefaz.java

package br.com.syspdv.nfe.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.net.URL;
import java.security.Security;

import javax.xml.soap.MessageFactory;
import javax.xml.soap.MimeHeaders;
import javax.xml.soap.SOAPConnection;
import javax.xml.soap.SOAPConnectionFactory;
import javax.xml.soap.SOAPConstants;
import javax.xml.soap.SOAPMessage;

public class AcessaWsDaSefaz {

	public static void AcessarWsComAutenticacao(String urlAddress, String envelope) {
		
		try {
			System.setProperty("java.protocol.handler.pkgs", "com.sun.net.ssl.internal.www.protocol");
			Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
			/*
			 * limpo propriedades
			 */
			System.clearProperty("javax.net.ssl.keyStore");
			System.clearProperty("javax.net.ssl.keyStorePassword");
			System.clearProperty("javax.net.ssl.trustStore");
			/*
			 * dados do certificado do cliente
			 */
			System.setProperty("javax.net.ssl.keyStoreType", "PKCS12");
			System.setProperty("javax.net.ssl.keyStore", "C:/CERTIFICADO_FULL.pfx");
			System.setProperty("javax.net.ssl.keyStorePassword", "123456");
			/*
			 * dados do certificado do servidor
			 */
			System.setProperty("javax.net.ssl.trustStoreType", "JKS");
			System.setProperty("javax.net.ssl.trustStore", "C:/NfeCacerts");
			System.setProperty("javax.net.ssl.trustStorePassword", "123456");
			/* Url do WebService */
			URL url = new URL(urlAddress);
			/* tipo de mensagem: SOAP */
			MimeHeaders header = new MimeHeaders();
			header.addHeader("Content-Type", "application/soap+xml");
			/* monta a mensagem SOAP */
			MessageFactory factory = MessageFactory
					.newInstance(SOAPConstants.SOAP_1_2_PROTOCOL);
			SOAPMessage message = factory.createMessage(header,
					new ByteArrayInputStream(envelope.getBytes()));
			/* instancia uma conexao SOAP */
			SOAPConnection conSoap = SOAPConnectionFactory.newInstance()
					.createConnection();
			/* Envia a mensagem SOAP ao WebService */
			SOAPMessage resWs = conSoap.call(message, url);
			/* Mostra a mensagem de retorno */
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			resWs.writeTo(out);
			System.out.println("out :\n" + out.toString());
		} catch (Exception ex) {
			System.out.println("Erro: " + ex.getMessage());
		}
	}
}

http://devbrasil.net/group/nfce-em-java/page/como-o-java-trabalha-com-certificados-digitais

https://github.com/caelum/caelum-stella/blob/master/stella-nfe/src/main/java/br/com/caelum/stella/nfe/ws/sp/status/ConsultaStatusSaoPauloHomolog.java

https://github.com/tatianaottenio/cte-integracao/blob/master/src/AssinadorDeXml.java

http://portillodesign.com.br/desenvolvimento/entendendo-sefaz-nfe-nfse-e-cte/