引用放置在 JSP 文件中的 WEB-INF 文件夹中的资源会在资源上返回 HTTP 404 [英] Referencing a resource placed in WEB-INF folder in JSP file returns HTTP 404 on resource
问题描述
我在eclipse中创建了一个名为BookShopWeb的动态Web项目，目录结构如下
I have a dynamic web project called BookShopWeb which I created in eclipse, with the following directory structure
/BookShopWeb/|
|--src
|---WebContent
|
|---META-INF
|----WEB-INF---web.xml
|
|--css--styles.css
|--jsp---index.jsp
在 web.xml 中，我将起始页设置为
In web.xml I set the start page as
<welcome-file-list>
<welcome-file>/WEB-INF/jsp/index.jsp</welcome-file>
在 index.jsp 中，我将 css 包含为
In the index.jsp I am including the css as
<head>
<link rel="stylesheet" type="text/css" href="../css/styles.css" />
</head>
加载时的索引页没有显示 css 信息.我用 firebug 检查了元素，它显示了一个错误报告
The index page when loaded however does not show the css info.I checked the element with firebug and it shows an error report
Apache Tomcat/6.0.29 - Error report..
The requested resource (/css/styles.css) is not available.
知道为什么会发生这种情况吗?我该如何纠正?谢谢标记
Any idea why this occurs?How can I correct this? thanks mark
推荐答案
/WEB-INF 文件夹中的文件不可公开访问.将 CSS 文件上一层，放在 WebContent 文件夹中，并通过在浏览器地址栏中直接输入其 URL 来确保可以访问它们.此外，您在 中指定的 URL 必须相对于请求 URL(您在打开 JSP 时在浏览器地址栏中看到的)，而不是它在服务器上的位置磁盘文件系统.最好的方法是以正斜杠 / 开头，使其与域相关.
Files in /WEB-INF folder are not public accessible. Put the CSS files one level up, in the WebContent folder, and ensure that they are accessible by entering their URL straight in the browser address bar. Also, the URL which you specify in the <link href> must be relative to the request URL (which you see in the browser address bar when opening the JSP), not to its location on the server disk file system. The best approach is to make it domain-relative by starting with a forward slash /.
<link rel="stylesheet" href="/BookShopWeb/css/styles.css" />
或者更动态一点，这样您就不需要每次更改上下文路径时都更改 JSP
or a bit more dynamically so that you don't need to change your JSPs everytime whenever you change the context path
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/styles.css" />
JSP 文件可以保存在 /WEB-INF 中，但这样它们只能通过调度 servlet 访问，要么通过扩展 HttpServlet 本地生成，要么由 servletcontainer 隐式例如
JSP files can be kept in /WEB-INF, but this way they are only accessible through a dispatching servlet, either homegrown by extending HttpServlet or implicitly by the servletcontainer such as the <welcome-file>.
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