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Editorial Team
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Asked: 2026-05-31T05:25:26+00:00

:) So I’ve bought my hosting finally, and I am trying to deploy my

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So I’ve bought my hosting finally, and I am trying to deploy my tomcat project on it.
Server is mochahost.com, JSP and Tomcat support is enabled. My project runs fine on local machine, however when I deploy it on web-server it says:

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Exception in JSP: /List/index.jsp:38

35: <br>    
36: <%
37: String file = application.getRealPath("/") + "default_list.txt";
38: FileReader filereader = new FileReader(file);
39: BufferedReader br = new BufferedReader(filereader);
40: String eachLine = br.readLine();
41: while (eachLine != null) {

What can be wrong? My guess is that it cant access the file, but how do I fix it? Thanks!

Update: problem was caused by server pathing, solved by using Server.MapPath method.

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1 Answer

  1. Editorial Team

    Right, this is a problem with trying to use file paths in web apps: you can’t know where you’ll be deployed.

    You have a few things you can try:

    1. Write the real path out to the log so you can see it. How else can you know what to do?
    2. Read files from the CLASSPATH using getResourceAsStream() from the servlet context.
    3. “default_list” suggests that this is reference data. You might try embedding it as JSON or XML since it’s constant.
    4. You shouldn’t be using scriptlet code in JSPs. Have a servlet pass that data to the JSP.
    5. Learn JSTL. You’ll be glad you did.
    6. Put the reference data in a database and read it from there.
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