与我之前的问题没什么不同。我想将这些保留为两个单独的问题(正如另一个问题的回答一样)。
我有一个网络服务,我想传回 Vector<Vector<Object>>
或ArrayList<ArrayList<Object>>
给客户。为此,我创建了一个简单的 POJO 类(感谢 Abhisek Bose),名为 VectorWS
。使用 Vector
的实现如下:
public class VectorWS {
private Vector vector;
public VectorWS() {
}
public VectorWS(Vector v) {
vector = v;
}
public Vector getVector() {
return vector;
}
public void setVector(Vector vector) {
this.vector = vector;
}
}
接口(interface)实现如下:
@WebService
@SOAPBinding(style = Style.RPC)
public interface ISQLServerConnectionWS {
@WebMethod
VectorWS executeSelectSQL(@WebParam(name = "sqlStatements") String sqlStatements);
}
服务端实现如下:
@WebService(endpointInterface="WebServices.ISQLServerConnectionWS")
public class SQLConnectionWSServer
implements ISQLServerConnectionWS {
@Override
public VectorWS executeSelectSQL(String sqlStatements) {
System.out.println("You are calling executeSelectSQL with " + sqlStatements );
Vector results = new Vector();
Vector row1 = new Vector();
Vector row2 = new Vector();
row1.add( "Name" );
row2.add( "Asamoah" );
results.add( row1 );
results.add( row2 );
VectorWS vws = new VectorWS(new ArrayList(results));
return vws;
}
}
客户端调用服务器服务方法为:
VectorWS results = server.executeSelectSQL( sqlStatements );
但是,当 vws
时,服务器会抛出异常。被返回。我已经尝试过这两个 Vector
和ArrayList
.
此实例中的异常(来自 ArrayList)可以在帖子末尾找到。
我的问题是我们是否无法返回 ArrayList<ArrayList<Object>>
有人会推荐什么?
唯一想到的就是 ArrayList<Object[]>
。有什么想法吗?
非常感谢,
安德兹
这是异常堆栈跟踪:
javax.xml.ws.WebServiceException: javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: class java.util.ArrayList nor any of its super class is known to this context.]
at com.sun.xml.internal.ws.message.jaxb.JAXBMessage.writePayloadTo(JAXBMessage.java:318)
at com.sun.xml.internal.ws.message.AbstractMessageImpl.writeTo(AbstractMessageImpl.java:131)
at com.sun.xml.internal.ws.encoding.StreamSOAPCodec.encode(StreamSOAPCodec.java:98)
at com.sun.xml.internal.ws.encoding.SOAPBindingCodec.encode(SOAPBindingCodec.java:249)
at com.sun.xml.internal.ws.transport.http.HttpAdapter.encodePacket(HttpAdapter.java:328)
at com.sun.xml.internal.ws.transport.http.HttpAdapter.access$100(HttpAdapter.java:82)
at com.sun.xml.internal.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:470)
at com.sun.xml.internal.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:233)
at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:95)
at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:80)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65)
at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:65)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:68)
at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:555)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65)
at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:527)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: class java.util.ArrayList nor any of its super class is known to this context.]
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:268)
at com.sun.xml.internal.bind.v2.runtime.BridgeImpl.marshal(BridgeImpl.java:89)
at com.sun.xml.internal.bind.api.Bridge.marshal(Bridge.java:130)
at com.sun.xml.internal.ws.message.jaxb.JAXBMessage.writePayloadTo(JAXBMessage.java:310)
... 18 more
Caused by: javax.xml.bind.JAXBException: class java.util.ArrayList nor any of its super class is known to this context.
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:234)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:249)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:641)
at com.sun.xml.internal.bind.v2.runtime.property.ArrayElementNodeProperty.serializeItem(ArrayElementNodeProperty.java:54)
at com.sun.xml.internal.bind.v2.runtime.property.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:157)
at com.sun.xml.internal.bind.v2.runtime.property.ArrayERProperty.serializeBody(ArrayERProperty.java:141)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:321)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:687)
at com.sun.xml.internal.bind.v2.runtime.BridgeImpl.marshal(BridgeImpl.java:136)
at com.sun.xml.internal.bind.v2.runtime.CompositeStructureBeanInfo.serializeBody(CompositeStructureBeanInfo.java:96)
at com.sun.xml.internal.bind.v2.runtime.CompositeStructureBeanInfo.serializeBody(CompositeStructureBeanInfo.java:44)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:687)
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:263)
... 21 more
Caused by: javax.xml.bind.JAXBException: class java.util.ArrayList nor any of its super class is known to this context.
at com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getBeanInfo(JAXBContextImpl.java:554)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:636)
... 31 more
最佳答案
您是否尝试过序列化对象,然后在序列化上运行 Base64,通过网络返回该对象,然后解码 Base64 并在收到时反序列化?
基本上,您的方法现在将返回一个字符串,即列表/vector 的 Base64 编码序列化,并且接收者需要取消编码字符串并解码对象。
我已经使用这种技术来序列化和反序列化复杂的列表和 vector 对象。
关于Java Web 服务并返回 Vector<Vector<Object>>,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6610608/