Java Axis2客户端在ServiceStub类中获取NullPointerException

我有一个客户端试图调用web服务-

public static void main(String[] args) throws RemoteException {
    SimpleServiceStub service = new SimpleServiceStub(
            "http://localhost:8080/axis2/services/SimpleService");
            ConcatRequest request = new ConcatRequest();
            request.setS1("abc");
            request.setS2("123");
            ConcatResponse response = service.concat(request);
            System.out.println(response.getConcatResponse());
}

异常stacktrace来自eclipse is中-

Exception in thread "main" org.apache.axis2.AxisFault
at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
at com.ttdev.ss.SimpleServiceStub.fromOM(SimpleServiceStub.java:1419)
at com.ttdev.ss.SimpleServiceStub.concat(SimpleServiceStub.java:190)
at com.ttdev.ss.SimpleClient.main(SimpleClient.java:15)
Caused by: java.lang.NullPointerException
at com.ttdev.ss.SimpleServiceStub.fromOM(SimpleServiceStub.java:1413)
... 2 more

*编辑*这是轴的堆栈跟踪

Exception in thread "HttpConnection-8080-1" java.lang.IllegalStateException: Response already committed
    at org.apache.axis2.transport.http.server.AxisHttpResponseImpl.assertNotCommitted(AxisHttpResponseImpl.java:75)
    at org.apache.axis2.transport.http.server.AxisHttpResponseImpl.sendError(AxisHttpResponseImpl.java:110)
    at org.apache.axis2.transport.http.server.AxisHttpService.doService(AxisHttpService.java:315)
    at org.apache.axis2.transport.http.server.AxisHttpService.handleRequest(AxisHttpService.java:187)
    at org.apache.axis2.transport.http.server.HttpServiceProcessor.run(HttpServiceProcessor.java:82)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

调试代码时，我看到在生成的存根类中传递了null参数（第一个参数）-

private  java.lang.Object fromOM(
    org.apache.axiom.om.OMElement param,
    java.lang.Class type,
    java.util.Map extraNamespaces) throws org.apache.axis2.AxisFault{

    try {

            if (com.ttdev.ss.SimpleServiceStub.ConcatRequest.class.equals(type)){

                       return com.ttdev.ss.SimpleServiceStub.ConcatRequest.Factory.parse(param.getXMLStreamReaderWithoutCaching());


            }

            if (com.ttdev.ss.SimpleServiceStub.ConcatResponse.class.equals(type)){

                       return com.ttdev.ss.SimpleServiceStub.ConcatResponse.Factory.parse(param.getXMLStreamReaderWithoutCaching());


            }

    } catch (java.lang.Exception e) {
    throw org.apache.axis2.AxisFault.makeFault(e);
    }
       return null;
    }

WSDL2Code.main(new String[] {       
    "-S", "src/main/java",
    "-R", "src/main/resources/META-INF",
    "-ns2p", "http://ttdev.com/ss=com.ttdev.ss",
    "-uri", "src/main/resources/SimpleService.wsdl" });

我尝试使用axis2版本1.5.1和1.6.2，服务器是本地服务器，版本是1.6.2

我不能在这里发布wsdl代码。它就是不出现 但下面是用于生成存根类的代码-

private  java.lang.Object fromOM(
    org.apache.axiom.om.OMElement param,
    java.lang.Class type,
    java.util.Map extraNamespaces) throws org.apache.axis2.AxisFault{

    try {

            if (com.ttdev.ss.SimpleServiceStub.ConcatRequest.class.equals(type)){

                       return com.ttdev.ss.SimpleServiceStub.ConcatRequest.Factory.parse(param.getXMLStreamReaderWithoutCaching());


            }

            if (com.ttdev.ss.SimpleServiceStub.ConcatResponse.class.equals(type)){

                       return com.ttdev.ss.SimpleServiceStub.ConcatResponse.Factory.parse(param.getXMLStreamReaderWithoutCaching());


            }

    } catch (java.lang.Exception e) {
    throw org.apache.axis2.AxisFault.makeFault(e);
    }
       return null;
    }

WSDL2Code.main(new String[] {       
    "-S", "src/main/java",
    "-R", "src/main/resources/META-INF",
    "-ns2p", "http://ttdev.com/ss=com.ttdev.ss",
    "-uri", "src/main/resources/SimpleService.wsdl" });

---

感谢您的帮助。顺便说一句，当我尝试使用CXF时，它是有效的。这要么是一个bug，要么是我从有效的WSDL生成java代码时出错了。

这是1.6.2版的bug！我把服务器版本降到了1.5.1，它可以正常工作了！我希望这能帮助其他在axis2中苦苦寻找答案的人（就像我一样）。

即使在1.6.1中，错误仍然存在，但在1.5.1中仍然可以完美地工作。1.5.1是没有出现错误的最新版本吗？这就是我降级到的版本。它可以使用1.5.x+