Error: java.lang.NullPointerException in Client with WebService. How fixed it? - spring

Question

I'm doing a example about jax-ws-spring-integration. My project have following structure.
In Client
Here file UserClient.java
public class UserClient {
static UserService service;
public static void main(String[] args) {
// TODO Auto-generated method stub
// System.out.println("From webservice"
// + service.sayHello("Nguyen van a"));
service = new UserService();
User user = service.getUser("hoaipham");
System.out.println("Hello" + user.getUserName());
System.out.println("Email" + user.getAge());
}
}
Here file UserService.java
#WebService
#Component
public class UserService {
#Autowired
private UserBo userBo;
#WebMethod(operationName = "getUser")
public User getUser(String username){
return userBo.loadUser(username);
}
#WebMethod(operationName = "say")
public String sayHello(String name){
return "Hanoi Java say hello to" + name;
}
}
When i run "main" in Client then occur following error:
Exception in thread "main" java.lang.NullPointerException at
edu.java.spring.ws.UserService.getUser(UserService.java:19) at
Client.UserClient.main(UserClient.java:14)

Answer 1

Hm, it looks like Spring not working in the Client (in a different jvm).
Try to create a instance of AnnotationConfigApplicationContext and add your class to the Context (or let the instance scan the package).
EDIT:
Try
public class UserClient {
static UserService service;
public static void main(String[] args) {
// TODO Auto-generated method stub
// System.out.println("From webservice"
// + service.sayHello("Nguyen van a"));
service = new AnnotationConfigApplicationContext(UserService.class)
.getBean(UserService.class);
User user = service.getUser("hoaipham");
System.out.println("Hello" + user.getUserName());
System.out.println("Email" + user.getAge());
}
}