JSP not detecting the javascript file_问答_开发者

开发者 https://www.devze.com 2023-01-18 00:59 出处：网络

From a servlet, I\'m forwarding the request to a JSP page which renders a FusionChart. But I\'ve a problem in loading the chart. The JSP file is not detecting the JavaScript file. The folder structure

From a servlet, I'm forwarding the request to a JSP page which renders a FusionChart. But I've a problem in loading the chart. The JSP file is not detecting the JavaScript file. The folder structure is:

axis
 |
 WebContent
      |
     WEB-INF
        |
       classes
         |_ com 
         |_FusionCharts.js
         |_MyChartJsp.jsp
         |_Line.swf

And the JSP code:

<html>
<head>
<script language="text/javascript" src="/WEB-INF/classes/FusionCharts.js"></script>
</head>
<body bgcolor="#ffffff">
<div id="chartdiv" align="left">The chart will appear within
this DIV. This text will be replaced by the chart.</div>
<script type="text/javascript">

var foo = //value fetched from DAO
var myChart = new FusionCharts("/WEB-INF/classes/Line.swf",
            "myChartId", "1000", "500");

    myChart
            .setDataXML("<graph caption='aCaption' xAxisName='xAxis' yAxisName='yAxis' showNames='1' decimalPreci开发者_如何学运维sion='0' formatNumberScale='0'>"+foo+"</graph>");
    myChart.render("chartdiv");
</script>

</body>
</html>

The Servlet code to forward the request:

final RequestDispatcher requestDispatcher = request.getRequestDispatcher("/WEB-INF/classes/MyChartJsp.jsp");
requestDispatcher.forward(request, response);

The request is getting forwarded to the JSP. But the chart is not getting displayed because it is unable to figure out what FusionCharts is in the line

var myChart = new FusionCharts("/WEB-INF/classes/Line.swf",
                "myChartId", "1000", "500");

I tried

src="/FusionCharts.js"

src="FusionCharts.js"

but no luck.

Has it something to do with the request being forwarded??

You cannot have .js (or .swf, .jpg, etc.) files in WEB-INF - they are not publically accessible.
Move it to /js/

There is no reason to hide static resources (like scripts and css) in WEB-INF. If you insist on that, you should make a servlet that, given the name of the js/css, would read it from its location and will serve it as a response. This is what the default servlet does when you access static resources.

The flow of the page loading is as follows: the browser sends a request to the servlet; the servlet forwards internally to the JSP, and the JSP is rendered as a response; then the browser parses the <script> tag and fires another request to the script. If the script is not accessible via URL, it's not loaded.

Then, to make the script url fixed to the servlet context root, use

src="<c:url value="/js/script.js" />"

This will work regardless of what is the current url

Not the cause of your problem, but also note that your <script> element is incorrect. It should be <script type="text/javascript"....

(I tried to post this as a comment, but for some reason it wouldn't let me.)

I was facing same issue. In my case when I calling the myFile.jsp directly its reading the myFile.js;

But when calling through login-> myFile.jsp, its not reading the myFile.js;

After analyzing the path through the Developer tools :=> console, I found that its inserting the uri, so final path was incorrect.

Final Solution:

I'd used the absolute path for all .js and .css. Now its called from everywhere.

My Project Structure is:

In my servlet-context.xml

i) <context:component-scan base-package="com.SBP.SHWeb" />

ii) <resources mapping="/resources/**" location="/resources/" />

My old path for including .js was: /resources/MyJs/myfile.js ===> Its not get called sometimes.

My Absolute path, which get called from all places is like this:

/SHweb/resources/MyJs/myfile.js ==> Its get called from everywhere.

Hope it help you.

JSP not detecting the javascript file

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