JSP、GET 和 POST 参数
我需要用JSP做一些小任务；作为 JSP 的新手，我想知道是否有可能从 HTTP 请求中仅获取 GET 或仅 POST 参数。
我见过 ServletRequest.getParameter （以及类似的），但是似乎这些方法同时获取 GET 和 POST 参数。有没有一种方法可以只获取其中一个，而无需自己解析 URL 或请求正文？如果没有，是否存在任何优先规则，哪些值会覆盖哪些值（例如 POST 参数总是覆盖 GET 参数）？
I am required to do some small tasks with JSP; being very new to JSP I was wondering if there was any possibility to get only GET or only POST parameters from the HTTP request.
I have seen ServletRequest.getParameter (and alikes) but it seems that those methods get both GET and POST parameters. Is there a way to get only one of them, without parsing the URL or the request body myself? And if not, is there any precedence rule which values overwrite which (like POST parameters always overwriting GET parameters)?
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一般来说，请求最好在 servlet 中处理。它们有
doGet(request, response)和doPost(request, response)方法来区分两者。如果您确实坚持在 JSP 中执行此操作，则可以使用
request.getMethod()。它将返回GET或POST。由于这是家庭作业，我想重点是学习如何使用 servlet 及其
doX方法，所以就这样做吧。更新：您可以获取查询字符串（
request.getQueryString())，这只是获取参数，并解析它，但我不会说这是一种常见且良好的做法。Generally, requests should better be handled in servlets. They have
doGet(request, response)anddoPost(request, response)methods, to differentiate the two.If you really insist on doing it in a JSP, you can differentiate the methods using
request.getMethod(). It would returnGETorPOST.Since this is homework, I guess the point is to learn how to use servlets and their
doXmethods, so do it that way.Update: You can get the query string (
request.getQueryString()), which is only the get parameters, and parse it, but I wouldn't say that's a common and good practice.在 JSP 中，您可以查看请求对象来确定它是什么类型的请求（GET 或 POST），但只有一个参数映射。
In JSP, you can look at the request object to determine what kind of request it was (GET or POST), but there's only one parameter map.
尝试[Servlet + JSP]。在 Servlet 中，您可以选择 doPost() 或 doGet()
Try [Servlet + JSP]. At Servlet you can choose between doPost() or doGet()