Hi. New to Servlets....
I have written a simple java CGI that sorts about 260 rows of a table as read in
from a tab-delimited text file generated by Excel.
The CGI works fine. I have since then attempted to convert it into a Servlet
but with little luck. My servlet references classes created for my CGI that
reads from the text file and creates an HTMLTable object from the
HTMLTable("filename") constructor I created. The printHTML() method then
returns a string containing the necessary code for the proper browser display.
Again, everything works fine in the CGI implementation. But when I create my
Servlet and test it using the servletrunner utility, all I get is blank output
in my browser window! My servlet also reads from another file to collect a
header and footer for the page i wish to display. Then once it reads the <TABLE
border> tag in the file, it replaces the table with the servlet generated sorted
table.
I realize that a JDBC- Servlet-SSI solution may be better but I do not have an
RDBMS at my disposal and am presently familiarizing myself with SSI's. I will
be moving to in the near future however to DB2. So once I learn the JDBC API
and SSI's, I will also need to read from the DB2 table and sort the results.
Here is a sample of my (very simplistic) source code...
Is it a servlet configuration error that I have commited? I simply altered the
servlet.properties file to reflect the addition of my new servlet. The
following lines where added to the servlet.properties file...
# toolbox servlet
servlet.session.code = ToolboxServlet
Here is a sample of my (very simplistic) source code...
public class ToolboxServlet extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException{
PrintWriter out;
response.setContentType("text/html");
out = response.getWriter();
HTMLTable me = new HTMLTable("tab_delimited_table_content.txt");
me.loadTable("tab_delimited_table_content.txt");
String HTMLCode = printBody("header_footer.html", me);
out.println(HTMLCode);
out.close();
}
public String printBody(String filename, HTMLTable table){
TextInputStream inFile = new TextInputStream(filename);
String s=inFile.readLine();
boolean withinTable = false;
String me = "<!-- HTML Code generated by ToolbBoxServlet --> ";
while (! inFile.fail()){
s=inFile.readLine();
if (0 <= s.indexOf("<Table border>") && ! withinTable){
me = me.concat(table.printTable());
withinTable = true;
}
if (0 <= s.indexOf("</Table>") && withinTable) withinTable =
false;
if (! withinTable) me = me.concat(s + "\n");
}
return me;
}
}
Thanks for you time.
A.
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