private static final String SCHEMA = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
        private static final String SCHEMA_PREFIX = "wsse";
        private static final String USERNAME = "username";
        private static final String PASSWORD = "password";
        // Create a SOAP header
        try {
            SOAPMessage soapMessage = MessageFactory.newInstance().createMessage();
            SOAPPart soapPart = soapMessage.getSOAPPart();
            SOAPEnvelope soapEnvelope = soapPart.getEnvelope();
            SOAPHeader header = soapEnvelope.getHeader();
            // Add the security SOAP header element
              SOAPHeaderElement security = header.addHeaderElement(new QName(SCHEMA, "Security", SCHEMA_PREFIX));
              SOAPElement usernameToken = security.addChildElement("UsernameToken", SCHEMA_PREFIX);
              SOAPElement usernameElement = usernameToken.addChildElement("Username", SCHEMA_PREFIX);
              SOAPElement passwordElement = usernameToken.addChildElement("Password", SCHEMA_PREFIX);
              Name typeName = soapEnvelope.createName("type");
              passwordElement.addAttribute(typeName, "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText");
              usernameElement.setTextContent(USERNAME);
              passwordElement.setTextContent(PASSWORD);
              ((WSBindingProvider) webServicePort).setOutboundHeaders(Headers.create(security));
        } catch (SOAPException e) {
            logger.severe("Error setting SOAP header");
            e.printStackTrace();
        }

<?xml version="1.0" encoding="utf-8"?>
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
    <env:Header>
        <wsse:Security env:mustUnderstand="1">
            <wsse:UsernameToken>
                <wsse:Username>username</wsse:Username>