request.getParameter()方法传递的数据，会从Web客户端传到Web服务器端，代表HTTP请求数据。request.getParameter()方法返回String类型的数据。

String title = "HttpServletRequest Method Values";
Map entries = new TreeMap();
entries.put("getCharacterEncoding", request.getCharacterEncoding());
entries.put("getContentLength", "" + request.getContentLength());
entries.put("getContentType", request.getContentType());
entries.put("getLocale", request.getLocale());
entries.put("getProtocol", request.getProtocol());
entries.put("getRemoteAddr", request.getRemoteAddr());
entries.put("getRemoteHost", request.getRemoteHost());
entries.put("getScheme", request.getScheme());
entries.put("getServerName", request.getServerName());
entries.put("getServerPort", "" + request.getServerPort());
entries.put("isSecure", "" + request.isSecure());
request.setAttribute("_table_title", title);
request.setAttribute("_table_entries", entries);

out.println(request.getCharacterEncoding());
%>

request.getParameter()取得是通过容器的实现来取得通过类似post，get等方式传入的数据

Request Information

JSP request method:


URL for the request:


Protocol of the request:


Server name:


Path:


Server port:


Remote address:


Remote host:


Locale:


User agent:

来自get 数据

In ShowPath1.jsp教程:
   request.getRequestURI() =

      
   request.getServletPath() =

      

jsp:include page="ShowPath2.jsp" flush="true"/>