在Python中，我可以轻松地使用Web服务：
from suds.client import Client
client = Client('http://www.example.org/MyService/wsdl/myservice.wsdl') #create client
result = client.service.myWSMethod("Bubi", 15) #invoke method
print result #print the result returned by the WS method
我想用Java实现这么简单的用法。
使用Axis或CXF，您必须创建一个Web服务客户端，即一个包复制所有Web服务方法的包，以便我们可以像使用普通方法一样调用它们。我们称之为 代理类 ;通常它们是由wsdl2java工具生成的。
有用且用户友好。但是每当我添加/修改Web服务方法并且我想在客户端程序中使用它时，我需要重新生成代理类。
所以我找到了 CXF DynamicClientFactory ，这种技术避免了使用代理类：
import org.apache.cxf.endpoint.Client;
import org.apache.cxf.endpoint.dynamic.DynamicClientFactory;
//...
//create client
DynamicClientFactory dcf = DynamicClientFactory.newInstance();
Client client = dcf.createClient("http://www.example.org/MyService/wsdl/myservice.wsdl");
//invoke method
Object[] res = client.invoke("myWSMethod", "Bubi");
//print the result
System.out.println("Response:\n" + res[0]);
但不幸的是，它创建并编译代理类运行时，因此需要生产机器上的JDK 。我必须避免这种情况，或者至少我不能依赖它。
我的问题：
是否有另一种方法可以在Java中以动态方式调用Web服务的任何方法，而无需在运行时使用JDK并且不生成“静态”代理类？也许有一个不同的图书馆？谢谢！
答案 0 :(得分：1)
我知道这是一个非常古老的问题，但如果您仍然感兴趣，可以使用 soap-ws github项目：https://github.com/reficio/soap-ws
这里有一个非常简单的示例用法：
Wsdl wsdl = Wsdl.parse("http://www.webservicex.net/CurrencyConvertor.asmx?WSDL");
SoapBuilder builder = wsdl.binding()
.localPart("CurrencyConvertorSoap")
.find();
SoapOperation operation = builder.operation()
.soapAction("http://www.webserviceX.NET/ConversionRate")
.find();
Request request = builder.buildInputMessage(operation)
SoapClient client = SoapClient.builder()
.endpointUrl("http://www.webservicex.net/CurrencyConvertor.asmx")
.build();
String response = client.post(request);
你可以看到它真的很简单。
答案 1 :(得分：0)
使用CXF 3.x可以使用StaxDataBinding。按照以下步骤获取基础知识。当然，这可以根据您的需求进行改进。
创建类似下面的StaxDataBinding。请注意下面的代码可以增强您的复杂程度。
class StaxDataBinding extends AbstractInterceptorProvidingDataBinding {
private XMLStreamDataReader xsrReader;
private XMLStreamDataWriter xswWriter;
public StaxDataBinding() {
super();
this.xsrReader = new XMLStreamDataReader();
this.xswWriter = new XMLStreamDataWriter();
inInterceptors.add(new StaxInEndingInterceptor(Phase.POST_INVOKE));
inFaultInterceptors.add(new StaxInEndingInterceptor(Phase.POST_INVOKE));
inInterceptors.add(RemoveStaxInEndingInterceptor.INSTANCE);
inFaultInterceptors.add(RemoveStaxInEndingInterceptor.INSTANCE);
}
static class RemoveStaxInEndingInterceptor
extends AbstractPhaseInterceptor<Message> {
static final RemoveStaxInEndingInterceptor INSTANCE = new RemoveStaxInEndingInterceptor();
public RemoveStaxInEndingInterceptor() {
super(Phase.PRE_INVOKE);
addBefore(StaxInEndingInterceptor.class.getName());
}
public void handleMessage(Message message) throws Fault {
message.getInterceptorChain().remove(StaxInEndingInterceptor.INSTANCE);
}
}
public void initialize(Service service) {
for (ServiceInfo serviceInfo : service.getServiceInfos()) {
SchemaCollection schemaCollection = serviceInfo.getXmlSchemaCollection();
if (schemaCollection.getXmlSchemas().length > 1) {
// Schemas are already populated.
continue;
}
new ServiceModelVisitor(serviceInfo) {
public void begin(MessagePartInfo part) {
if (part.getTypeQName() != null
|| part.getElementQName() != null) {
return;
}
part.setTypeQName(Constants.XSD_ANYTYPE);
}
}.walk();
}
}
@SuppressWarnings("unchecked")
public <T> DataReader<T> createReader(Class<T> cls) {
if (cls == XMLStreamReader.class) {
return (DataReader<T>) xsrReader;
}
else {
throw new UnsupportedOperationException(
"The type " + cls.getName() + " is not supported.");
}
}
public Class<?>[] getSupportedReaderFormats() {
return new Class[] { XMLStreamReader.class };
}
@SuppressWarnings("unchecked")
public <T> DataWriter<T> createWriter(Class<T> cls) {
if (cls == XMLStreamWriter.class) {
return (DataWriter<T>) xswWriter;
}
else {
throw new UnsupportedOperationException(
"The type " + cls.getName() + " is not supported.");
}
}
public Class<?>[] getSupportedWriterFormats() {
return new Class[] { XMLStreamWriter.class, Node.class };
}
public static class XMLStreamDataReader implements DataReader<XMLStreamReader> {
public Object read(MessagePartInfo part, XMLStreamReader input) {
return read(null, input, part.getTypeClass());
}
public Object read(QName name, XMLStreamReader input, Class<?> type) {
return input;
}
public Object read(XMLStreamReader reader) {
return reader;
}
public void setSchema(Schema s) {
}
public void setAttachments(Collection<Attachment> attachments) {
}
public void setProperty(String prop, Object value) {
}
}
public static class XMLStreamDataWriter implements DataWriter<XMLStreamWriter> {
private static final Logger LOG = LogUtils
.getL7dLogger(XMLStreamDataWriter.class);
public void write(Object obj, MessagePartInfo part, XMLStreamWriter writer) {
try {
if (!doWrite(obj, writer)) {
// WRITE YOUR LOGIC HOW you WANT TO HANDLE THE INPUT DATA
//BELOW CODE JUST CALLS toString() METHOD
if (part.isElement()) {
QName element = part.getElementQName();
writer.writeStartElement(element.getNamespaceURI(),
element.getLocalPart());
if (obj != null) {
writer.writeCharacters(obj.toString());
}
writer.writeEndElement();
}
}
}
catch (XMLStreamException e) {
throw new Fault("COULD_NOT_READ_XML_STREAM", LOG, e);
}
}
public void write(Object obj, XMLStreamWriter writer) {
try {
if (!doWrite(obj, writer)) {
throw new UnsupportedOperationException("Data types of "
+ obj.getClass() + " are not supported.");
}
}
catch (XMLStreamException e) {
throw new Fault("COULD_NOT_READ_XML_STREAM", LOG, e);
}
}
private boolean doWrite(Object obj, XMLStreamWriter writer)
throws XMLStreamException {
if (obj instanceof XMLStreamReader) {
XMLStreamReader xmlStreamReader = (XMLStreamReader) obj;
StaxUtils.copy(xmlStreamReader, writer);
xmlStreamReader.close();
return true;
}
else if (obj instanceof XMLStreamWriterCallback) {
((XMLStreamWriterCallback) obj).write(writer);
return true;
}
return false;
}
public void setSchema(Schema s) {
}
public void setAttachments(Collection<Attachment> attachments) {
}
public void setProperty(String key, Object value) {
}
}
}
准备输入以匹配预期输入，如下所示
private Object[] prepareInput(BindingOperationInfo operInfo, String[] paramNames,
String[] paramValues) {
List<Object> inputs = new ArrayList<Object>();
List<MessagePartInfo> parts = operInfo.getInput().getMessageParts();
if (parts != null && parts.size() > 0) {
for (MessagePartInfo partInfo : parts) {
QName element = partInfo.getElementQName();
String localPart = element.getLocalPart();
// whatever your input data you need to match data value for given element
// below code assumes names are paramNames variable and value in paramValues
for (int i = 0; i < paramNames.length; i++) {
if (paramNames[i].equals(localPart)) {
inputs.add(findParamValue(paramNames, paramValues, localPart));
}
}
}
}
return inputs.toArray();
}
现在设置正确的数据绑定并传递数据
Bus bus = CXFBusFactory.getThreadDefaultBus();
WSDLServiceFactory sf = new WSDLServiceFactory(bus, wsdl);
sf.setAllowElementRefs(false);
Service svc = sf.create();
Client client = new ClientImpl(bus, svc, null,
SimpleEndpointImplFactory.getSingleton());
StaxDataBinding databinding = new StaxDataBinding();
svc.setDataBinding(databinding);
bus.getFeatures().add(new StaxDataBindingFeature());
BindingOperationInfo operInfo = ...//find the operation you need (see below)
Object[] inputs = prepareInput(operInfo, paramNames, paramValues);
client.invoke("operationname", inputs);
如果需要，您可以匹配以下操作名称
private BindingOperationInfo findBindingOperation(Service service,
String operationName) {
for (ServiceInfo serviceInfo : service.getServiceInfos()) {
Collection<BindingInfo> bindingInfos = serviceInfo.getBindings();
for (BindingInfo bindingInfo : bindingInfos) {
Collection<BindingOperationInfo> operInfos = bindingInfo.getOperations();
for (BindingOperationInfo operInfo : operInfos) {
if (operInfo.getName().getLocalPart().equals(operationName)) {
if (operInfo.isUnwrappedCapable()) {
return operInfo.getUnwrappedOperation();
}
return operInfo;
}
}
}
}
return null;
}