java - 在 spring mvc 3 中使用路径变量

Question

我正在从Spring in Action 3rd Edition学习Spring MVC并遇到了路径变量的使用。根据书中给出的示例，我不清楚它是如何工作的，请帮助我理解这里的概念:

@RequestMapping(method=RequestMethod.POST)
public String addSpitterFromForm(@Valid Spitter spitter, BindingResult bindingResult) {
   if(bindingResult.hasErrors()){
       return"spitters/edit";
   }
   spitterService.saveSpitter(spitter);
   return "redirect:/spitters/" + spitter.getUsername();
}

As for the path that it’s redirecting to, it’ll take the form of /spitters/{username} where {username} represents the username of the Spitter that was just submitted. For example, if the user registered under the name habuma, then they’d be redirected to /spitters/habuma after the form submission.

在上面的语句中，它表示请求被重定向到 /spitters/habuma，其中 habuma 是用户名。

@RequestMapping(value="/{username}",method=RequestMethod.GET)
public String showSpitterProfile(@PathVariable String username, Model model){
    model.addAttribute(spitterService.getSpitter(username));
    return "spitters/view";
}

For example, if the request path is /username/habuma, then habuma will be passed in to showSpitterProfile() for the username.

这里说 showSpitterProfile() 方法处理 /username/habuma 的请求，这与前面提到的语句相矛盾。

看起来第一个语句本身是正确的，但请告诉我方法 showSpitterProfile 是否处理两个 URL，即 /splitters/habuma 和 /username/habuma 或/spitters/用户名/habuma？

Answer 1

如果类级别上的@RequestMapping(您的问题中未显示)仅是@RequestMapping("/spitter)，则没有/username路径组件“)。书上可能有错别字。正确的句子是:

For example, if the request path is /spitter/habuma, then habuma will be passed in to showSpitterProfile() for the username.