为Spring MVC / AOP应用程序实现动态菜单 [英] Implementing dynamic menu for Spring MVC/AOP application

问题描述

我希望为我的Spring MVC应用程序实现动态可更改的菜单（无论何时添加带注释的方法或控制器）。

I wish to implement dynamically changeable menu (updating whenever annotated method or controller added) for my Spring MVC application.

我想要的是引入新的注释（ @RequestMenuMapping ）这将转到 @Controller bean及其方法（就像 @RequestMapping 工作）。

What i want is to introduce new annotation (@RequestMenuMapping) which will go to @Controller beans and their methods (just like @RequestMapping works).

Heres是我想要的，用户类，生成菜单如

Heres is what i want, User class, producing menu like

Users
    Index | List | Signup | Login

：

@Controller
@RequestMapping("user")
@RequestMenuMapping("Users")
public class User {

    @RequestMapping("")
    @RequestMenuMapping("Index")
    public String index(/* no model here - just show almost static page (yet with JSP checks for authority)*/) {
        return "user/index.tile";
    }

    @RequestMapping("list")
    @RequestMenuMapping("List")
    public String list(Model model) {

        model.addAttribute("userList",/* get userlist from DAO/Service */);

        return "user/list.tile";
    }

    @RequestMapping("signup")
    @RequestMenuMapping("Signup")
    public String signup(Model model) {

        model.addAttribute("user",/* create new UserModel instance to be populated by user via html form */);

        return "user/signup.tile";
    }

    @RequestMapping("login")
    @RequestMenuMapping("Login")
    public String login(Model model) {

        model.addAttribute("userCreds",/* create new UserCreds instance to be populated via html form with login and pssword*/);

        return "user/login.tile";
    }
}

我认为Spring AOP可以帮助我切入方法使用 @RequestMenuMapping 注释并通过 @AfterReturning 将代表网站菜单的内容添加到模型中。

I think that Spring AOP may help me to pointcut methods with @RequestMenuMapping annotation and via @AfterReturning add something representing web-site menu to model.

但这提出了两个问题：

1. 我如何获得模型实例 @AfterReturning 通知方法，以防顾问方法中缺少（如 .index（））？


2. 我如何获得所有方法（如java反射方法）和类（如java反射<$） c $ c> Class ）用 @RequestMenuMapping 注释以构建完整的菜单索引？

1. How do i get Model instance in @AfterReturning advice method in case it is missing in adviced method (as in .index())?
2. How do i get all methods (as in java reflection Method) and classes (as in java reflection Class) annotated with @RequestMenuMapping in order to build complete menu index?

推荐答案

InterceptorDemo：

InterceptorDemo:

@Aspect
@Component
public class InterceptorDemo {

  @Pointcut("@annotation(org.springframework.web.bind.annotation.RequestMapping)")
  public void requestMapping() {
  }
  @Pointcut("@annotation(you.package.RequestMenuMapping)")
  public void requestMenuMapping() {
  }


  @AfterReturning("requestMapping() && equestMenuMapping()")
  public void checkServer(JoinPoint joinPoint,Object returnObj) throws Throwable {
      Object[] args = joinPoint.getArgs();
      Model m = (Model)args[0];
      // use joinPoint get class or methd...
  }
}

如果你想用自己的方法拦截控制器，你可以用另一个切入点和 ProceedingJoinPoint 对象来获得你想要的东西。

If you want to intercept Contoller with you own, you can wirte another pointcut and ProceedingJoinPoint object can get what you want.

这篇关于为Spring MVC / AOP应用程序实现动态菜单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！