从mJSP页面获取URL [英] Get the URL from mJSP page

问题描述

我将使用其设置获取当前JSP网页的URL 例如:index.jsp?参数= 12

I would grab the URL of the current JSP web page with its settings example: index.jsp? param = 12

你有什么想法吗? 谢谢

Have you any idea? Thank you

推荐答案

您可以从 EL 中的HttpServletRequest.html"rel =" noreferrer> HttpServletRequest 对象>. ?之前的部分可通过 getRequestURL() 方法和?之后的部分可通过

You can get it from the HttpServletRequest object which is in EL available by ${pageContext.request}. The part before the ? is available by getRequestURL() method and the part after the ? is available by getQueryString() method. So, in a nutshell:

<p>Request URL: ${pageContext.request.requestURL}</p>
<p>Query string: ${pageContext.request.queryString}</p>
<p>Full URL: ${pageContext.request.requestURL}?${pageContext.request.queryString}</p>

如果要使用普通的Java代码执行此操作，则最好为此使用 Servlet .

If you want to do this using normal Java code, you'd better use a Servlet for this.

String requestURL = request.getRequestURL().toString();
String queryString = request.getQueryString();
if (queryString != null) requestURL += "?" + queryString;
// ...

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