Question

我在单独的弹簧启动模块中具有控制器，服务和DAO。我尝试使用JPA API StoredProcedureQuery方法从DAO模块调用存储过程，因为这需要自动装配EntityManager。如果我将DAO作为弹簧启动应用程序单独运行，则此设置有效。但是当我从控制器调用此DAO类时，我得到了NullPointerException。

我在DAO项目中的LoginDAO

@Repository
public class LoginDAO implements ILoginDAO {

@Autowired
EntityManager entityManager;
@Transactional
public LoginEntity getLoginCheck(String[] loginfo) {
    StoredProcedureQuery storedProcedure =entityManager.createStoredProcedureQuery("DPR_LOGIN_CHECK");
    }
}

我在Controller Module中的LoginController类

@Controller
public class LoginController {

@Autowired
LoginDAO loginDAO;

@RequestMapping(value = "/LoginAction", method = RequestMethod.POST)
public @ResponseBody
String getLoginCheck(@RequestParam(value = "dataString") String dataString,
        HttpSession session, HttpServletRequest request,
        HttpServletResponse response) {
loginDAO.getLoginCheck(null,loginDetails);
    }
}

我的控制器项目依赖于DAO。这是我的主控制器类

@SpringBootApplication(scanBasePackages={"com.mars.presentation","com.mars.UserManagementControllers","com.mars","com.mars.CommonDAO"})
public class MarsApplication extends SpringBootServletInitializer {

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
    return application.sources(MarsApplication.class);
}

public static void main(String[] args) throws Exception {
    SpringApplication.run(MarsApplication.class, args);
    }
}

和主要的DAO类

@SpringBootApplication(scanBasePackages={"com.mars.CommonDAO"}) 
@EntityScan(basePackages={"com.mars.CommonEntities"})
@EnableJpaRepositories
public class CommonDao {

public static void main(String[] args) {
    ApplicationContext ctx = SpringApplication.run(CommonDao.class, args);
    String[] loginfo = new String[] {"cjva", "Banaacvdvna", "Orange", "Grapes"};
    LoginDAO loginDAO = ctx.getBean(LoginDAO.class);
    loginDAO.getLoginCheck(null,loginfo);
    }
}

如何将一个项目的EntityManager自动连线到另一个项目

0 个答案: