Analysis of External Resource Relative Path Problem in jsp and css

Add base to the jsp page, using relative paths:

<%

    String path = request.getContextPath();

    String basePath = request.getScheme() + "://"

            + request.getServerName() + ":" + request.getServerPort()

            + path + "/";

%> 

And then < head > Add base to Label

< base href=" < %=basePath% > " > < /base >

When introducing external files "directly" on this page, you can do so directly

<script src="js/common/jquery-1.11.1.min.js" language="javascript"

    type="text/javascript"></script>

<script src="js/common/frame.js" language="javascript"

    type="text/javascript"></script>

<link href="css/common/frame.css"

    rel="stylesheet" type="text/css" />

<link rel="shortcut icon" href="images/favicon.ico" type="image/x-icon" />

Similarly, the css class on this page

.top {

    position: absolute;

    left: 0;

    top: 95px;

    right: 0;

    height: 120px;

    background: url(images/common/title.jpg) repeat-x

}

=========================Exceptions: when introducing external css, js files and introducing image, etc. ===========================

If relative paths are also used at this time, since they are no longer in the jsp page, relative paths are relative to the directory where this css file is located:

For example: Begong New System, css file introduced in index.jsp page

< link href="css/common/frame.css" rel="stylesheet" type="text/css" / > On the jsp page, js/common/frame.js was introduced, starting from the website and directory, and that's OK.

However, in frame.js, the following css exists

.show_menu{

    background-image: url(images/left_bg.gif);

    background-repeat: repeat-y;

    background-position:285px 51px;

}

In this case, direct url (images/left_bg.gif;Is the default from the directory where this css file is located (/css/common/frame.css) +url (images/left_bg.gif), so the image needed here needs to be configured separately.

Change to

.show_menu{

    background-image: url(../../images/left_bg.gif);

    background-repeat: repeat-y;

    background-position:285px 51px;

}