Web 服务客户端从 getMyWSPort 获取 NullPointerException

Question

I have created a simple web service called TimeServerBean . It's working properly, the GlassFish server is running and I can access the WSDL file from browser. Note this is done on local host.

Next I created a new project and made a web service client and provided the URL to the WSDL file. Then I got some classes generated (JAX-WS). On my client class I have this code:

public class SimpleClient {

    @WebServiceRef(wsdlLocation = "wsdl url here")
    static TimeServerBean_Service service;
    private TimeServerBean bean;

    public SimpleClient() {
         bean = service.getTimeServerBeanPort();
    }
    //methods here
}

Although I get null when I call the getTimeServerBeanPort . During that time the server is up and running. Is there some obvious mistake? TimeServerBean and TimeServerBean_Service are generated classes from the WSDL.

Answer 1

Two suggestions:

1. DEFINITELY put your method in a try / catch block

2. Assuming that service itself is null, then try doing an explicit service.create() instead of using the @WebServiceRef annotation. Here's a good example (Websphere, but same principle):

http://www-01.ibm.com/support/docview.wss?uid=swg21264135

Answer 2

The @WebServiceRef annotation is only supported in certain class types. Examples are JAX-WS endpoint implementation classes, JAX-WS handler classes, Enterprise JavaBeans classes, and servlet classes. This annotation is supported in the same class types as the @Resource annotation. See the Java Platform, Enterprise Edition (Java EE) 5 specification for a complete list of supported class types.

Answer 3

I generally do it by creating an instance using the interface and the class.

public class SimpleClient {

    // interface TimeServerBean_Service class TimeServerBean
    @WebServiceRef(wsdlLocation = "wsdl url here")
    static TimeServerBean_Service port = new TimeServerBean.getTimeServerBeanPort();

    public static void main(String[] args) {
        try {
            System.out.println(port);
            System.out.println(port.methodWS("args"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //methods here
}