java 在 Spring 3.0 GET 请求中，@PathVariable 和 @RequestParam 有什么区别
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In a Spring 3.0 GET request, what's the difference between a @PathVariable and a @RequestParam
提问by August
In an example such as the following, what's the difference between a @PathVariableand a @RequestParam?
在如下示例中， a@PathVariable和 a之间有什么区别@RequestParam？
@RequestMapping(value = "/portfolio/{portfolioIdPath}", method = RequestMethod.GET)
public final String portfolio(HttpServletRequest request, ModelMap model,
@PathVariable long portfolioIdPath, @RequestParam long portfolioIdRequest)
回答by benw
@RequestParambinds a request parameter to a parameter in your method. In your example, the value of the parameter named "portfolioIdRequest" in the GET request will be passed as the "portfolioIdRequest" argument to your method. A more concrete example - if the request URL is
@RequestParam将请求参数绑定到方法中的参数。在您的示例中，GET 请求中名为“portfolioIdRequest”的参数的值将作为“portfolioIdRequest”参数传递给您的方法。一个更具体的例子 - 如果请求 URL 是
http://hostname/portfolio/123?portfolioIdRequest=456
then the value of the parameter "portfolioIdRequest" will be "456".
那么参数“portfolioIdRequest”的值将是“456”。
More info here: http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/mvc.html#mvc-ann-requestparam
更多信息：http: //static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/mvc.html#mvc-ann-requestparam
@PathVariablesimilarly binds the value of the URI template variable "portfolioIdPath" to the method parameter "portfolioIdPath". For example, if your URI is
@PathVariable类似地将 URI 模板变量“portfolioIdPath”的值绑定到方法参数“portfolioIdPath”。例如，如果您的 URI 是
/portfolio/123
then the value of "portfolioIdPath" method parameter will be "123".
那么“portfolioIdPath”方法参数的值将是“123”。
More info here: http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/mvc.html#mvc-ann-requestmapping-uri-templates
更多信息：http: //static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/mvc.html#mvc-ann-requestmapping-uri-templates
回答by Erhan Bagdemir
@RequestParam identifies the HTTP GET or POST parameter which is sent by the client(user), And @RequestMapping extracts a segment of URL which varies from request to request:
@RequestParam 标识客户端（用户）发送的 HTTP GET 或 POST 参数，@RequestMapping 提取一段 URL，该段因请求而异：
http://host/?var=1
In the above URL "var"is a requestparam.
在上面的 URL 中，“var”是一个请求参数。
http://host/registration/{which}
and above URL's {which}is a request mapping. You could call your service like :
和上面的 URL 的{which}是一个请求映射。你可以像这样调用你的服务：
http://host/registration/user
OR like
或喜欢
http://host/registration/firm
In your application you can access the value of {which}(In first case which="user" and in second which="firm".
在您的应用程序中，您可以访问{which}的值（第一种情况 which="user" 和第二种情况 which="firm"。
回答by sina
It depends the way you want to handle your request
这取决于您想要处理请求的方式
@RequestParam example
(request)http://something.com/owner?ownerId=1234
@PathVariable example
(request) http://something.com/owner/1234
(in tour code) /owner/{ownerId}
