new URL(
	request.getScheme(), 
    request.getServerName(), 
    request.getServerPort(), 
    request.getContextPath()
    );		
		

		
<%=request.getServerName() %>
		
		

页面跳转

response.sendRedirect("/content/test.jsp");			
			

			
<%
   Enumeration paramNames = request.getParameterNames();

   while(paramNames.hasMoreElements()) {
      String paramName = (String)paramNames.nextElement();
      String paramValue = request.getParameter(paramName);
      out.println(paramName + ": " + paramValue + "<br/>\n");
   }
%>			
			
			

			
<%= request.getParameter("first_name")%>

<c:set var="UA" value="${param.first_name}" />
<c:out value="${param.first_name}"/>