<context:component-scan base-package="com.xiaohao">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
</context:component-scan>
在loginAction中
@Autowired
private UserService userService;
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
String username = loginForm.getUsernmae();
String password = loginForm.getPassword();
String val = userService.user_login(username, password);
System.out.println(val);
return null;
}
然后 String val = userService.user_login(username, password);这一句空指针异常
UserService.java
@Service(value="userService")
public class UserServiceImp implements UserService{
@Autowired
private UserDao userdao;
public String user_login(String username, String password) {
// TODO Auto-generated method stub
System.out.println("======"+username);
return userdao.user_login(username, password);
}
}
UserDao
@Repository(value = "UserDao")
public class UserDaoImp implements UserDao{
public String user_login(String username, String password) {
// TODO Auto-generated method stub
if(username.equals("xiaohao")||password.equals("123")){
return "success";
}
else return "failed";
}
}
请问下错误原因。
