Question

我设计了一个包装结构。

控制器
Delegates（帮助类） - 此类执行所有业务并将值返回给控制器。
服务
服务实施
DAO
DAO实施。

我想实现autowired（Annotation）概念，并希望在spring-bean.xml上避免使用xml配置，例如服务和DAO配置。

如果我想避免xml配置，此代码无效。

我做了那些改变

bean id：loginDelegate，userService，userDao
添加了@Service＆amp; @Repository注释到相应的服务＆amp; DAO实施。

@Controller("loginController")
public class LoginController {

    @Autowired
    private LoginDelegate loginDelegate;

    public LoginDelegate getLoginDelegate() {
        return this.loginDelegate;
    }
    public void setLoginDelegate(LoginDelegate tLoginDelegate) {
        this.loginDelegate = tLoginDelegate;
    }
    @RequestMapping(value="/login.do",method=RequestMethod.GET)
    public ModelAndView displayLogin(HttpServletRequest request, HttpServletResponse response) {
        log.info("<---displayLogin()--->");
        ModelAndView model = new ModelAndView("login");
        LoginBean loginBean = new LoginBean();
        model.addObject("loginBean", loginBean);
        return model;
    }
}   

public class LoginDelegate {
     @Autowired
     private IUserService userService;

     public IUserService getUserService() {
         return this.userService;
     }

     public void setUserService(IUserService userService) {
         this.userService = userService;
     }

     public boolean isValidUser(String username, String password) throws Exception {
         return userService.isValidUser(username, password);
     }
}

public interface IUserService {
    public boolean isValidUser(UserBean userObj);
    public int addUsers(UserBean userObj);
}

public class UserServiceImpl implements IUserService {
    @Autowired
    private IUserDao userDao;

    public IUserDao getUserDao()  {
        return this.userDao;
    }

    public void setUserDao(IUserDao userDao) {
        this.userDao = userDao;
    }

    public boolean isValidUser(UserBean userObj) {
        return userDao.isExistUser(userObj);
    }

    @Override
    public int addUser(final UserBean userObj) {
        return userDao.saveUserDetails(userObj);    
    }
}

public interface IUserDao {
    public boolean isExistUser(UserBean userObj);
    public int saveUserDetails(UserBean userObj);
}

public class UserDaoImpl implements IUserDao {
    @Autowired
    UserBean userObj;

    @Autowired
    DataSource dataSource ;

    public DataSource getDataSource(){
        return this.dataSource;
    }

    public void setDataSource(DataSource dataSource){
        this.dataSource = dataSource;
    }

Answer 1

如果要完全摆脱基于XML的配置，请使用基于Java的配置

@Configuration
@ComponentScan(basePackages = "com.acme")
public class AppConfig  {
    ...
}

使用@Configuration注释时，上面的普通Java类使其成为“Spring配置类”（类似于基于XML的配置）。
@ComponentScan注释扫描从启动时定义的包中使用@ Component，@ Controller，@ Service，@ Repository类注释的类，以使它们注册为Spring bean。这可以使用<context:component-scan base-package="com.acme" />

参见：http://docs.spring.io/spring-framework/docs/current/spring-framework-reference/html/beans.html#beans-java-instantiating-container-scan

如何在spring框架

1 个答案: