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发信人: agents (智能代理), 信区: Java
标  题: JSP 语法（6）
发信站: BBS 水木清华站 (Tue Jan  2 14:49:24 2001)

6 【Include Directive】
   Includes a file of text or code when the JSP page is translated.

▲ ［JSP Syntax］

<%@ include file="relativeURL" %>

▲［Examples］

include.jsp:

<html>
<head><title>An Include Test</title></head>
<body bgcolor="white">
<font color="blue">
   The current date and time are
<%@ include file="date.jsp" %>
</font>
</body>
</html>

date.jsp:

<%@ page import="java.util.*" %>
<%= (new java.util.Date() ).toLocaleString() %>

Displays in the page:

The current date and time are
Aug 30, 1999 2:38:40

▲［Description］

  The include directive inserts a file of text or code in a JSP file at
  translation time, when the JSP file is compiled. The include process
  is static. A static include means that the text of the included file
  is added to the JSP file. The included file can be a JSP file,  HTML
  file, or text file. If the included file is a JSP file, its JSP tags
  are parsed and their results included (along with any other text) in
  the JSP file.

  You can only use include to include static files. This means that the
  parsed  result of the included file is added to the JSP file where the
  include directive is placed. Once the included file is parsed and included,
  processing resumes with the next line of the calling JSP file.

  The included file can be an HTML file, a JSP file, a text file, or a code
  file written in the Java programming language. Be careful, though, that
  the included file does not contain <html>, </html>, <body>, or </body> tags.
  Because the entire content of the included file is added at that location
  in the JSP file, these tags would conflict with similar tags in the JSP file.
  Some of the behaviors of the include directive depend on the JSP engine, for
  example:
  The included file may be open and available to all requests, or it may have
  security restrictions.
  The JSP page may be recompiled if the included file changes.

▲［Attributes］

    file="relativeURL"

     The pathname to the included file, which can contain any text or code that
     is valid in a JSP file. The value of file is always a relative URL.
     Simply put, a relative URL is just the path segment of an URL, without the
     protocol, port, or domain:
     "error.jsp"
    "/templates/onlinestore.html"
    "/beans/calendar.jsp"
    If the relative URL starts with /, the path is relative to the JSP
    application's context, which is a javax.servlet.ServletContext object
    that is in turn stored in the application object. If the relative URL starts
    with a directory or file name, the path is relative to the JSP file.

    Tip
    If you are including a text file and do not want the text to be displayed
    in the JSP page, place comment tags around the text in the text file.

--

※ 修改:·agents 於 Jan  2 15:48:49 修改本文·[FROM:   166.111.54.22]
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