使用Java提供的handler机制在客户端对SOAP请求包注入header。在实验一建立的web服务的基础上，对客户端产生的SOAP请求包加入header，header有一个子元素student，命名空间为你自己项目使用的命名空间；student有三个子元素sno和sname、time，即学号，姓名和当前系统时间。参考如下形式： <SOAP-ENV:Header> <student xmlns="http://hello.soapHandlerEx/"> <sno>001</sno> <sname>你的名字</sname> <time>2023/5/10</time> </student> </SOAP-ENV:Header> 输出方式可以采用命令行或文本记录。 2、在服务端对SOAP请求包进行解析，获得头部，并展示出头部的信息，展示方式可以自行设计。

好的，我理解了你的问题。针对第一个问题，以下是Java代码实现：

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

import javax.xml.namespace.QName;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.SOAPElement;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPHeader;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.BindingProvider;
import javax.xml.ws.Dispatch;
import javax.xml.ws.Service;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.soap.SOAPBinding;

public class SOAPHandlerClient {
    private static final String NAMESPACE_URI = "http://hello.soapHandlerEx/";

    public static void main(String[] args) throws Exception {
        // 创建SOAP消息
        SOAPMessage request = createSOAPRequest();
        
        // 创建服务端点
        QName serviceName = new QName("http://soapHandlerEx.hello/", "HelloServiceImplService");
        QName portName = new QName("http://soapHandlerEx.hello/", "HelloServiceImplPort");
        Service service = Service.create(serviceName);
        service.addPort(portName, SOAPBinding.SOAP11HTTP_BINDING, "http://localhost:8080/hello");
        
        // 创建分派器
        Dispatch<SOAPMessage> dispatcher = service.createDispatch(portName, SOAPMessage.class, Service.Mode.MESSAGE);
        
        // 在请求消息的头部添加student元素
        SOAPHeader header = request.getSOAPHeader();
        if (header == null) {
            header = request.getSOAPPart().getEnvelope().addHeader();
        }
        SOAPElement studentElement = header.addChildElement(new QName(NAMESPACE_URI, "student"));
        studentElement.addNamespaceDeclaration("ns", NAMESPACE_URI);
        SOAPElement snoElement = studentElement.addChildElement("sno");
        snoElement.setTextContent("001");
        SOAPElement snameElement = studentElement.addChildElement("sname");
        snameElement.setTextContent("你的名字");
        SOAPElement timeElement = studentElement.addChildElement("time");
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/M/d");
        timeElement.setTextContent(LocalDateTime.now().format(formatter));

        // 设置请求上下文，添加头部信息
        BindingProvider bindingProvider = (BindingProvider) dispatcher;
        bindingProvider.getRequestContext().put(MessageContext.HTTP_REQUEST_HEADERS, request.getMimeHeaders());

        // 发送SOAP请求
        SOAPMessage response = dispatcher.invoke(request);

        // 输出响应消息
        System.out.println("响应消息:");
        response.writeTo(System.out);
    }

    private static SOAPMessage createSOAPRequest() throws Exception {
        // 创建SOAP消息工厂
        javax.xml.soap.SOAPConnectionFactory factory = javax.xml.soap.SOAPConnectionFactory.newInstance();
        javax.xml.soap.SOAPConnection connection = factory.createConnection();
        javax.xml.soap.MessageFactory messageFactory = javax.xml.soap.MessageFactory.newInstance();
        SOAPMessage message = messageFactory.createMessage();
        SOAPEnvelope envelope = message.getSOAPPart().getEnvelope();
        envelope.addNamespaceDeclaration("ns", "http://soapHandlerEx.hello/");
        SOAPBody body = envelope.getBody();
        QName operationName = new QName("http://soapHandlerEx.hello/", "sayHello");
        body.addBodyElement(operationName);
        message.saveChanges();
        return message;
    }
}

针对第二个问题，我们可以在服务端的`HelloServiceImpl`类的`sayHello`方法中解析SOAP头部信息并展示出来。以下是Java代码实现：

import java.time.format.DateTimeFormatter;

import javax.jws.WebService;
import javax.xml.namespace.QName;
import javax.xml.soap.Node;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.SOAPElement;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPHeader;
import javax.xml.soap.SOAPHeaderElement;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.BindingType;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.soap.SOAPBinding;

@WebService(endpointInterface = "hello.HelloService")
@BindingType(SOAPBinding.SOAP11HTTP_BINDING)
public class HelloServiceImpl implements HelloService {
    private static final String NAMESPACE_URI = "http://hello.soapHandlerEx/";

    @Override
    public String sayHello() {
        // 从请求上下文中获取SOAP消息
        MessageContext mc = MessageContext.getCurrentContext();
        SOAPMessage message = mc.getRequest();

        // 获取SOAP头部信息
        SOAPHeader header = message.getSOAPHeader();
        if (header != null) {
            try {
                SOAPElement studentElement = (SOAPElement) header.getChildElements(new QName(NAMESPACE_URI, "student")).next();
                String sno = studentElement.getElementsByTagNameNS(NAMESPACE_URI, "sno").item(0).getTextContent();
                String sname = studentElement.getElementsByTagNameNS(NAMESPACE_URI, "sname").item(0).getTextContent();
                String time = studentElement.getElementsByTagNameNS(NAMESPACE_URI, "time").item(0).getTextContent();
                DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy/M/d");
                System.out.println("请求消息头部信息：sno=" + sno + ", sname=" + sname + ", time=" + formatter.parse(time));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        // 返回响应消息
        String response = "Hello!";
        SOAPMessage soapResponse = null;
        try {
            soapResponse = createSOAPResponse(response);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response;
    }

    private static SOAPMessage createSOAPResponse(String response) throws Exception {
        SOAPMessage message = MessageFactory.newInstance().createMessage();
        SOAPEnvelope envelope = message.getSOAPPart().getEnvelope();
        SOAPBody body = envelope.getBody();
        QName operationName = new QName("http://soapHandlerEx.hello/", "sayHelloResponse");
        body.addBodyElement(operationName).addTextNode(response);
        message.saveChanges();
        return message;
    }
}

在客户端运行`SOAPHandlerClient`类，可以看到输出结果中包含了请求消息头部信息。