Spring MVC @RequestMapping 继承

问题描述

来自 Struts2 我习惯于在超类(或 package-info.java)上声明 @Namespace 注释并且继承类随后会获取该值在其祖先的 @Namespace 注释中，并将其添加到 Action 的请求路径中.我现在正在尝试使用 @RequestMapping 注释在 Spring MVC 中做类似的事情(代码为简洁起见):

Coming from Struts2 I'm used to declaring @Namespace annotation on super classes (or package-info.java) and inheriting classes would subsequently pick up on the value in the @Namespace annotation of its ancestors and prepend it to the request path for the Action. I am now trying to do something similar in Spring MVC using @RequestMapping annotation as follows (code trimmed for brevity):

package au.test

@RequestMapping(value = "/")
public abstract class AbstractController {
    ...
}

au.test.user

@RequestMapping(value = "/user")
public abstract class AbstractUserController extends AbstractController {

    @RequestMapping(value = "/dashboard")
    public String dashboard() {
        ....
    }
}

au.test.user.twitter

@RequestMapping(value = "/twitter")
public abstract class AbstractTwitterController extends AbstractUserController {
    ...
}

public abstract class TwitterController extends AbstractTwitterController {

    @RequestMapping(value = "/updateStatus")
    public String updateStatus() {
        ....
    }
}

• / 按预期工作
• /user/dashboard 按预期工作
• 然而，当我期望 /user/twitter/updateStatus 正常工作时，它并没有运行，并且检查日志我可以看到一个类似于以下内容的日志条目:
• / works as expect
• /user/dashboard works as expected
• However when I would have expected /user/twitter/updateStatus to work it does not and checking the logs I can see a log entry which looks something like:

org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping- 将 URL 路径 [/tweeter/updateStatus] 映射到处理程序'推特控制器'

是否有我可以启用的设置来扫描 @RequestMapping 注释的超类并构建正确的路径?

Is there a setting I can enable that will scan the superclasses for @RequestMapping annotations and construct the correct path?

我也认为在 package-info.java 中的包上定义 @RequestMapping 是非法的?

Also I take it that defining @RequestMapping on a package in package-info.java is illegal?

推荐答案

下面基本上变成了 /tweeter/updateStatus 而不是 /user/推特/更新状态

The following basically becomes /tweeter/updateStatus and not /user/tweeter/updateStatus

public abstract class TwitterController extends AbstractTwitterController {

    @RequestMapping(value = "/updateStatus")
    public String updateStatus() {
        ....
    }
}

这是预期的行为，因为您已经覆盖了您在 AbstractController 和 AbstractUserController 中声明的原始 @RequestMapping.

That's the expected behavior since you've overriden the original @RequestMapping you've declared in the AbstractController and AbstractUserController.

事实上，当您声明AbstractUserController 时，它也覆盖了AbstractController 的@RequestMapping.它只是让你错觉 AbstractController 中的/已经被继承了.

In fact when you declared that AbstractUserController it also overriden the @RequestMapping for AbstractController. It just gives you the illusion that the / from the AbstractController has been inherited.

有没有我可以启用的设置来扫描 @RequestMapping 注释的超类并构建正确的路径?"从来没听说过.

"Is there a setting I can enable that will scan the superclasses for @RequestMapping annotations and construct the correct path?" Not that I know of.

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