使用 Spring 的 @RequestMapping 和通配符

Using Spring's @RequestMapping with wildcards

提问by Tony R

This is similar to this question, but I am still confused about my situation. I want to map this ant-style pattern to a controller method:

这与this question类似，但我仍然对我的情况感到困惑。我想将此蚂蚁样式的模式映射到控制器方法：

/results/**

That is, I want any URL like www.hostname.com/MyServlet/results/123/abc/456/def/to go to this method. I have:

也就是说，我希望任何 URL 都www.hostname.com/MyServlet/results/123/abc/456/def/可以转到此方法。我有：

<servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/results/*</url-pattern>
</servlet-mapping>

and:

和：

@RequestMapping(value="/**", method=RequestMethod.GET)
public ModelAndView handleRequest() {...}

This works to guide the request to my method, but leads me to several questions:

这可以将请求引导到我的方法，但会导致我提出几个问题：

1. What if I add another servlet mapping, like <url-pattern>/another-mapping/*</url-pattern>??? It will also get mapped to that method! How can I separate the two?
2. Why does the url-pattern /results/*work, whereas /results/**doesn't? According to ant path styles, **means to include nested /characters, whereas *stops at the next /. So, it should only successfully map a URL like /results/123, bot NOT /results/123/abc/. Right?

1. 如果我添加另一个 servlet 映射，比如<url-pattern>/another-mapping/*</url-pattern>??? 它也将映射到该方法！我怎样才能将两者分开？
2. 为什么 url-pattern/results/*有效，而/results/**无效？根据蚂蚁路径样式，**意味着包含嵌套/字符，而*在下一个/. 因此，它应该只成功映射一个 URL，如/results/123, bot NOT /results/123/abc/。对？

回答by nicholas.hauschild

Perhaps in your servlet mapping you would want to direct all traffic to '/*'. This way, you can distinguish in your controller what method to use with different @RequestMapping's.

也许在您的 servlet 映射中，您希望将所有流量定向到“/*”。通过这种方式，您可以在控制器中区分使用不同 @RequestMapping 的方法。

<servlet-mapping>
  <servlet-name>MyServlet</servlet-name>
  <url-pattern>/*</url-pattern>
</servlet-mapping>

and

和

@RequestMapping(value="/results/**", method=RequestMethod.GET)
public ModelAndView handleResults() {...}

@RequestMapping(value="/another-mapping/**", method=RequestMethod.GET)
public ModelAndView handleAnotherMapping() {...}

Hopefully the above will help with number 1. As far as number 2 goes, I do not think that you can use 'ant-style' pattern matchers (specifically **) in your web.xml domain descriptor.

希望以上内容对第 1 点有所帮助。就第 2 点而言，我认为您不能在 web.xml 域描述符中使用“ant-style”模式匹配器（特别是 **）。

回答by axtavt

What if I add another servlet mapping, like /another-mapping/*??? It will also get mapped to that method! How can I separate the two?

如果我添加另一个 servlet 映射，比如 /another-mapping/*??? 它也将映射到该方法！我怎样才能将两者分开？

With your current configuration you cannot. If you want to map DispatcherServletto multiple URL patterns and distinguish between them, you can declare DefaultAnnotationHandlerMappingwith alwaysUseFullPath = "true"and use full path in @RequestMapping.

使用您当前的配置，您不能。如果你想映射DispatcherServlet到多个URL模式以及它们之间的区别，你可以声明DefaultAnnotationHandlerMapping与alwaysUseFullPath = "true"和使用的完整路径@RequestMapping。

Alternatively, you can map DispatcherServletas <url-pattern>/*</url-pattern>and use full path in @RequestMappingwithout reconfiguring DefaultAnnotationHandlerMapping. Though in this case you'll need to configre exclusions for static content.

或者，您可以映射DispatcherServlet为<url-pattern>/*</url-pattern>并使用完整路径，@RequestMapping而无需重新配置DefaultAnnotationHandlerMapping. 尽管在这种情况下，您需要为静态内容配置排除项。

Why does the url-pattern /results/* work, whereas /results/** doesn't? According to ant path styles, ** means to include nested / characters, whereas * stops at the next /. So, it should only successfully map a URL like /results/123, bot NOT /results/123/abc/. Right?

为什么 url-pattern /results/* 有效，而 /results/** 无效？根据蚂蚁路径样式，** 表示包含嵌套的 / 字符，而 * 停止在下一个 /。所以，它应该只成功映射一个像 /results/123 这样的 URL，而不是 /results/123/abc/。对？

URL patterns in web.xmlare not ant-style patterns, so that only .../*and *.xxxwildcards are allowed in them.

中的 URL 模式web.xml不是 ant 风格的模式，因此它们中只允许使用.../*和*.xxx通配符。