我正在使用axis2来创建Web服务 . 我想使用自己的wsdl文件而不是使用生成的wsdl文件 . 当我将自己的wsdl文件放在META-INF目录中并部署我的Web服务时，他们正在成功部署 . 但问题是，当我尝试使用soapui测试这些Web服务时，它会抛出空指针异常 .
例如，我在soap ui中调用以下操作 .
public String testWebService(String a, String b)
{
LogHelper.info("Value of a is:"+a);
LogHelper.info("Value of b is :"+b);
String c=a.trim()+b.Trim();
return "suceess"
}
output in console:
value of a is:
value of b is:null
19:58:47,781 ERROR [RPCMessageReceiver] Exception occurred while trying to invoke service method testWebService
Sun.reflect.DeativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）的java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke在org.apache.axis2.rpc.receivers.RPCMessageReceiver（Method.java:597）在org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass（RPCUtil.java:194） . invokeBusinessLogic（RPCMessageReceiver.java:102）在org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic（AbstractInOutMessageReceiver.java:40）在org.apache.axis2.receivers.AbstractMessageReceiver.receive（AbstractMessageReceiver.java:114）在org.apache .axis2.engine.AxisEngine.receive（AxisEngine.java:173）在org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest（HTTPTransportUtils.java:173）在org.apache.axis2.transport.http.AxisServlet.doPost （AxisServlet.java:142）位于javax.servlet.http.HttpSe rvlet.service（HttpServlet.java:637）处org.apache在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:290）javax.servlet.http.HttpServlet.service（HttpServlet.java:717）位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain）的org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter（ReplyHeaderFilter.java:96）.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）的.java：235）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:235）在org.apache.catalina . core.StandardContextValve.invoke（StandardContextValve.java:191）在org.jboss.web.tomcat.security.SecurityAssociationValve.invoke（SecurityAssociationValve.java:190）在org.jboss.web.tomcat.security.JaccContextValve.invoke（JaccContextValve . java：92）at o ............................................ ..........
所以我理解的是，我得到的值是空白，b的值是空的 .
任何人都可以给我任何建议 .
谢谢，
纳伦德拉