您可以使用开源的Membrane SOA库（[ http://www.membrane-soa.org/soa-model-doc/1.4/java-api/create-soap-request-template.htm ]）为WSDL中定义的每个操作生成XML：

public void createTemplates(String url){

    WSDLParser parser = new WSDLParser();
    Definitions wsdl = parser.parse(url);   
    StringWriter writer = new StringWriter();
    SOARequestCreator creator = new SOARequestCreator();
    creator.setBuilder(new MarkupBuilder(writer));
    creator.setDefinitions(wsdl);

    for (Service service : wsdl.getServices()) {
        for (Port port : service.getPorts()) {
            Binding binding = port.getBinding();
            PortType portType = binding.getPortType();
            for (Operation op : portType.getOperations()) {
                creator.setCreator(new RequestTemplateCreator());
                creator.createRequest(port.getName(), op.getName(), binding.getName());
                System.out.println(writer);
                writer.getBuffer().setLength(0);
        }
    }
}

Soap UI还提供了Java Api，用于从WSDL创建请求和响应xml。

public static void main(String[] args) throws Exception {
        WsdlProject project = new WsdlProject();
        WsdlInterface[] wsdls = WsdlImporter.importWsdl(project, "http://localhost:8080/Service?wsdl");
        WsdlInterface wsdl = wsdls[0];
        for (Operation operation : wsdl.getOperationList()) {
            WsdlOperation wsdlOperation = (WsdlOperation) operation;
            System.out.println("Request:\n"+wsdlOperation.createRequest(true));
            System.out.println("\nResponse:\n"+wsdlOperation.createResponse(true));

        }
    }

Soap UI的Developer's corner有很好的指针用于与soap UI Api集成。

了解AXIS
http://axis.apache.org/axis2/java/core/

如果您有SOAPHandler请求，您可以如下打印xml：

public static String getRawXml(SOAPMessageContext context) {
        try {
            ByteArrayOutputStream byteOS = new ByteArrayOutputStream();
            context.getMessage().writeTo(byteOS);
            return byteOS.toString("UTF-8");
        } catch (SOAPException | IOException e) {
            throw new RuntimeException(e);
        }
}

并在handleMessage和handleFault中调用此方法。
另一方面，如果您不使用apache或其他库来调用soap服务，则可以手动查看jdk中MessageWrapper类构造函数，并在packet变量上添加断点，然后在调试模式中查看p.toString()：）

MessageWrapper(Packet p, Message m) {
        super(m.getSOAPVersion());
        this.packet = p;
        this.delegate = m;
        this.streamDelegate = m instanceof StreamMessage ? (StreamMessage)m : null;
        this.setMessageMedadata(p);
    }