服务器端的WebService类，同时也是客户端类（因为有main方法以及测试的代码）

package webservice;

import javax.xml.namespace.QName;
import javax.xml.soap.Name;
import javax.xml.soap.SOAPElement;

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.encoding.XMLType;
import org.apache.axis.message.SOAPHeader;
import org.apache.axis.message.SOAPHeaderElement;

public class Power
{
	public static String GetMessage()
	{
		return "调用成功！";
	}
	public static void main(String... a) throws Exception
	{
		String endpoint = "http://localhost:9000/hg/services/Power";
		SOAPHeaderElement headerElement = new SOAPHeaderElement("http://schemas.xmlsoap.org/soap/envelope/", "sessionInfo");
		headerElement.setMustUnderstand(false);
		headerElement.addNamespaceDeclaration("soap", "http://schemas.xmlsoap.org/soap/envelope/");
		SOAPElement sid = headerElement.addChildElement("sessionId");
		sid.addTextNode("1234567890ABCDEF1234567890ABCDEF");
		Service service = new Service();
		Call call = (Call) service.createCall();
		call.setTargetEndpointAddress(new java.net.URL(endpoint));
		call.setOperationName(new QName("GetMessage", "GetMessage"));
		// call.addParameter(new QName("http://cn.zuoguodang.service", "name"),
		// org.apache.axis.encoding.XMLType.XSD_STRING, ParameterMode.IN);
		call.setReturnType(XMLType.SOAP_STRING);
		// 设定 Header
		call.addHeader(headerElement);
		System.out.println(call.invoke(new Object[] {}));
	}
}

服务器端的SoapHeader类

package webservice;

import java.util.Iterator;

import javax.xml.namespace.QName;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPHeader;

import org.apache.axis.AxisFault;
import org.apache.axis.Message;
import org.apache.axis.MessageContext;
import org.apache.axis.message.MessageElement;
import org.apache.axis.message.SOAPEnvelope;
import org.apache.axis.message.SOAPHeaderElement;

public class Soapheader extends org.apache.axis.handlers.BasicHandler
{
	private String sessionId;

	@Override
	public void invoke(MessageContext msgContext) throws AxisFault
	{
		boolean processedHeader = false;
		String headerName = null;
		try
		{
			// 取得 Request 的 SOAP 信息
			Message msg = msgContext.getRequestMessage();
			SOAPEnvelope envelope = msg.getSOAPEnvelope();
			SOAPHeader header = envelope.getHeader();
			Iterator it = header.examineAllHeaderElements();
			SOAPHeaderElement hel;
			while (it.hasNext())
			{
				hel = (SOAPHeaderElement) it.next();
				headerName = hel.getNodeName();
				if (headerName.equals("sessionInfo"))
				{
					// 对于 mustUnderstand 设为 true 的 Header，必须
					// 利用下列的方式把它设为"已经处理"，否则 service
					// 会回传 Did not understand "MustUnderstand"
					hel.setProcessed(true);
					checkUser(hel);
					processedHeader = true;
				}
			}
		}
		catch (SOAPException e)
		{
			throw new AxisFault("无法处理 SOAP Header.", e);
		}
		if (!processedHeader) { throw new AxisFault("接收 SOAP Header 失败"+headerName); }
	}
	private void checkUser(SOAPHeaderElement hel) throws AxisFault
	{
		MessageElement fele = hel.getChildElement(new QName("", "sessionId"));
		if (fele == null) { throw new AxisFault("找不到 sessionId 标签."); }
		sessionId = fele.getValue();
		if (!"12345".equals(sessionId)) { throw new AxisFault("认证失败"); }
	}
}

因为是使用axis2 webservice，所以要修改server-config.wsdd，增加SoapHeader作为handler，放在根节点下面

<handler name="Authenticate" type="java:webservice.Soapheader" />

并在globalConfiguration/requestFlow下面再增加节点：

<handler type="Authenticate"/>

c# 来调用这个服务的话，先生成代理类，然后在生成的代理类里面增加一个属性：

public CredentialSoapHeader SoapHeaderValue;

然后在需要调用的webserice方法上加注释：

[System.Web.Services.Protocols.SoapHeaderAttribute("SoapHeaderValue")]

CredentialSoapHeader类代码如下：

    [System.Xml.Serialization.XmlTypeAttribute(Namespace = "")]
    [System.Xml.Serialization.XmlRootAttribute("sessionInfo", Namespace = "", IsNullable = false)]
    public class CredentialSoapHeader : System.Web.Services.Protocols.SoapHeader
    {
        public string sessionId;
    }

调用webservice并使用soapheader的代码如下：

            PowerService sps = new PowerService();
            CredentialSoapHeader cs = new CredentialSoapHeader();
            cs.sessionId = "12345";
            sps.SoapHeaderValue = cs;
            Response.Write(sps.GetMessage());