菜鸟初学，请大虾指点啊！
使用MyEclipse的web services explorer浏览器的WSDL页面直接调用web service服务，
或者使用axis2自动生成客户端stub类代理TermInfoStub和JUnit Test类TermInfoTest,调用web service服务时
1、客户端报错空指针异常：
[ERROR] Exception occurred while trying to invoke service method getTermInfoById
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194)
at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:98)
at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at dataAccess.TermInfo.getTermInfoById(TermInfo.java:450)
... 25 more
2、如果使用axis2自动生成Client端的代理类TermInfoStub和JUnit Test类TermInfoTest,调用web service服务时，（详细代码见3），
debug跟踪,执行到_operationClient.execute(true);时出现上面的空指针异常,
如果debug跟进去的话，会执行调用，连接数据库调用到getStatement()时，报错:
[INFO] Unable to sendViaPost to url[http://localhost:8080/axis2/services/TermInfo]
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413)
at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
at org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:542)
at org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:189)
at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:75)
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:364)
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:208)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:448)
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:401)
at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:228)
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:163)
at dataaccess.TermInfoStub.ifTheTermIsExistByLabelCh(TermInfoStub.java:5900)
at dataaccess.TermInfoTest.testifTheTermIsExistByLabelCh(TermInfoTest.java:791)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
3./**
* Auto generated method signature
*
* @see dataaccess.TermInfo#ifTheTermIsExistById
* @param ifTheTermIsExistById23
*
* @throws dataaccess.ExceptionException0 :
*/
public dataaccess.TermInfoStub.IfTheTermIsExistByIdResponse ifTheTermIsExistById(
dataaccess.TermInfoStub.IfTheTermIsExistById ifTheTermIsExistById23)
throws java.rmi.RemoteException
, dataaccess.ExceptionException0 {
org.apache.axis2.context.MessageContext _messageContext = null;
try {
org.apache.axis2.client.OperationClient _operationClient = _serviceClient
.createClient(_operations[12].getName());
_operationClient.getOptions().setAction("urn:ifTheTermIsExistById");
_operationClient.getOptions().setExceptionToBeThrownOnSOAPFault(
true);
addPropertyToOperationClient(
_operationClient,
org.apache.axis2.description.WSDL2Constants.ATTR_WHTTP_QUERY_PARAMETER_SEPARATOR,
"&");
// create a message context
_messageContext = new org.apache.axis2.context.MessageContext();
// create SOAP envelope with that payload
org.apache.axiom.soap.SOAPEnvelope env = null;
env = toEnvelope(getFactory(_operationClient.getOptions()
.getSoapVersionURI()), ifTheTermIsExistById23,
optimizeContent(new javax.xml.namespace.QName(
"http://dataAccess", "ifTheTermIsExistById")));
// adding SOAP soap_headers
_serviceClient.addHeadersToEnvelope(env);
// set the message context with that soap envelope
_messageContext.setEnvelope(env);
// add the message contxt to the operation client
_operationClient.addMessageContext(_messageContext);
_serviceClient.getOptions().setProperty(HTTPConstants.SO_TIMEOUT,new Integer(600000));
_serviceClient.getOptions().setProperty(HTTPConstants.CONNECTION_TIMEOUT,new Integer(600000));
// execute the operation client
[color=#FF0000] _operationClient.execute(true);
/*执行到此处时停止，捕捉到异常，如果跟进去的话，会执行连接数据库操作，但出现问题：[INFO] Unable to sendViaPost to url[http://localhost:8080/axis2/services/TermInfo]
java.net.SocketTimeoutException: Read timed out */[/color]
org.apache.axis2.context.MessageContext _returnMessageContext = _operationClient
.getMessageContext(org.apache.axis2.wsdl.WSDLConstants.MESSAGE_LABEL_IN_VALUE);
org.apache.axiom.soap.SOAPEnvelope _returnEnv = _returnMessageContext
.getEnvelope();
java.lang.Object object = fromOM(_returnEnv.getBody()
.getFirstElement(),
dataaccess.TermInfoStub.IfTheTermIsExistByIdResponse.class,
getEnvelopeNamespaces(_returnEnv));
return (dataaccess.TermInfoStub.IfTheTermIsExistByIdResponse) object;
} catch (org.apache.axis2.AxisFault f) {
org.apache.axiom.om.OMElement faultElt = f.getDetail();
if (faultElt != null) {
if (faultExceptionNameMap.containsKey(faultElt.getQName())) {
// make the fault by reflection
try {
java.lang.String exceptionClassName = (java.lang.String) faultExceptionClassNameMap
.get(faultElt.getQName());
java.lang.Class exceptionClass = java.lang.Class
.forName(exceptionClassName);
java.lang.Exception ex = (java.lang.Exception) exceptionClass
.newInstance();
// message class
java.lang.String messageClassName = (java.lang.String) faultMessageMap
.get(faultElt.getQName());
java.lang.Class messageClass = java.lang.Class
.forName(messageClassName);
java.lang.Object messageObject = fromOM(faultElt,
messageClass, null);
java.lang.reflect.Method m = exceptionClass.getMethod(
"setFaultMessage",
new java.lang.Class[] { messageClass });
m.invoke(ex, new java.lang.Object[] { messageObject });
if (ex instanceof dataaccess.ExceptionException0) {
throw (dataaccess.ExceptionException0) ex;
}
throw new java.rmi.RemoteException(ex.getMessage(), ex);
} catch (java.lang.ClassCastException e) {
// we cannot intantiate the class - throw the original
// Axis fault
throw f;
} catch (java.lang.ClassNotFoundException e) {
// we cannot intantiate the class - throw the original
// Axis fault
throw f;
} catch (java.lang.NoSuchMethodException e) {
// we cannot intantiate the class - throw the original
// Axis fault
throw f;
} catch (java.lang.reflect.InvocationTargetException e) {
// we cannot intantiate the class - throw the original
// Axis fault
throw f;
} catch (java.lang.IllegalAccessException e) {
// we cannot intantiate the class - throw the original
// Axis fault
throw f;
} catch (java.lang.InstantiationException e) {
// we cannot intantiate the class - throw the original
// Axis fault
throw f;
}
} else {
throw f;
}
} else {
throw f;
}
} finally {
_messageContext.getTransportOut().getSender().cleanup(
_messageContext);
}
}
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2008/5/23 9:31:00
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请教客户端调用web service服务异常！
