尝试调用服务方法时发生Axis2异常

Question

我的网络服务是

public List getRes(int a, int b) throws Exception { 

List list = new ArrayList(); 

list.add("ddd"); 

list.add("ddd"); 

list.add("ddd"); 

System.out.println(list);
return list;

}

我正在使用axis2代码生成器来生成存根。 我正在使用客户端

HelloWorldStub stublist=new HelloWorldStub();

HelloWorldStub.GetRes requestlist = new HelloWorldStub.GetRes();

requestlist.setA(1);

requestlist.setB(2);

GetResResponse responselist = stublist.getRes(requestlist);

System.out.println("Response : " + responselist.get_return());

但是这项服务正在抛出异常

Exception in thread "main" org.apache.axis2.AxisFault: Exception occurred while trying to invoke service method getRes
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:271)
at org.apache.axis2.description.OutInAxisOperationClient.execute(OutInAxisOperation.java:202)
at com.HelloWorldStub.getRes(HelloWorldStub.java:246)
at com.Client.main(Client.java:51)

此异常是否有任何解决方案

提前致谢