@Scope（“ prototype”）bean范围未创建新bean

Z时代
2024-01-10
分类：问答

我想在控制器中使用带注释的原型bean。但是春天正在创建一个单例豆。这是该代码：

@Component
@Scope("prototype")
public class LoginAction {
  private int counter;
  public LoginAction(){
    System.out.println(" counter is:" + counter);
  }
  public String getStr() {
    return " counter is:"+(++counter);
  }
}

控制器代码：

@Controller
public class HomeController {
    @Autowired
    private LoginAction loginAction;
    @RequestMapping(value="/view", method=RequestMethod.GET)
    public ModelAndView display(HttpServletRequest req){
        ModelAndView mav = new ModelAndView("home");
        mav.addObject("loginAction", loginAction);
        return mav;
    }
    public void setLoginAction(LoginAction loginAction) {
        this.loginAction = loginAction;
    }
    public LoginAction getLoginAction() {
        return loginAction;
    }
    }

速度模板：

 LoginAction counter: ${loginAction.str}

Spring config.xml已启用组件扫描：

    <context:annotation-config />
    <context:component-scan base-package="com.springheat" />
    <mvc:annotation-driven />

每次我都会增加计数。无法弄清楚我要去哪里错了！

更新资料

正如@gkamal所建议的那样，我使-awareHomeController webApplicationContext可以解决问题。

更新的代码：

@Controller
public class HomeController {
    @Autowired
    private WebApplicationContext context;
    @RequestMapping(value="/view", method=RequestMethod.GET)
    public ModelAndView display(HttpServletRequest req){
        ModelAndView mav = new ModelAndView("home");
        mav.addObject("loginAction", getLoginAction());
        return mav;
    }
    public LoginAction getLoginAction() {
        return (LoginAction) context.getBean("loginAction");
    }
}