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Connecting to URL (another jsp) and parse info (IN JSP ONLY)

Posted on 2002-06-18
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Last Modified: 2010-04-01
Relatively new to Java.  Understand how to do jsp, have located java code to conect to site using URLConnection object.  Can this java code be placed in jsp?  When I do this I get many errors.  I just want to be able to return the content of the page and parse the information that I want.  If I cannot place only in jsp, how do I compile servlet and call from jsp?

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Question by:joelettuce
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6 Comments
 
LVL 6

Expert Comment

by:kotan
ID: 7091475
That can be done in jsp.
What is the errors you got?

0
 
LVL 19

Expert Comment

by:cheekycj
ID: 7092787
of course you can place java code in a jsp.. just put the code btw <% .... %>

e.g.

<%
  int myInt = 0;
%>

Now if you are Using URLConnection make sure you are importing the appropriate classes.

<%@ page import="java.net.*,java.io.*" %>

<%
        try {
            URL ee = new URL("http://www.experts-exchange.com/");
            URLConnection conn = ee.openConnection();
            DataInputStream dis = new DataInputStream(conn.getInputStream());
            String inputLine;

            while ((inputLine = dis.readLine()) != null) {
                // code that handles each line as it is read in
            }
            dis.close();
        } catch (MalformedURLException me) {
            // handle bad urls
        } catch (IOException ioe) {
            // handle IO errors when making connection or retrieve info etc
        }
%>

HTH,
CJ
0
 

Author Comment

by:joelettuce
ID: 7096757
Kotan, the error I receive is the following:

org.apache.jasper.compiler.ParseException: /home/fantasy/java/scraping.jsp(3,26) Attribute  has no value


cheekyci, when I enter the code you provided into the "Body"?  (Is this correct), I get the same error above.  The for the quick response, should be simple.

Here is the code:

<HTML>

<HEAD>
<jsp:include flush="/true"/  page="/components/header.html"/ >
</HEAD>

<BODY>

<%@ page import="java.net.*,java.io.*" %>

<%
       try {
           URL ee = new URL("http://www.experts-exchange.com/");
           URLConnection conn = ee.openConnection();
           DataInputStream dis = new DataInputStream(conn.getInputStream());
           String inputLine;

Alert(inputLine);

           while ((inputLine = dis.readLine()) != null) {
               // code that handles each line as it is read in
           }
           dis.close();
       } catch (MalformedURLException me) {
           // handle bad urls
       } catch (IOException ioe) {
           // handle IO errors when making connection or retrieve info etc
       }
%>

</BODY>
</HTML>
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LVL 19

Accepted Solution

by:
cheekycj earned 75 total points
ID: 7096838
IMHO, I think this is the line causing the problem:

<jsp:include flush="/true"/  page="/components/header.html"/ >

try this:
<%@ page import="java.net.*,java.io.*" %>
<HTML>

<HEAD>
<jsp:include flush="true"  page="/components/header.html" />
</HEAD>

<BODY>



<%
      try {
          URL ee = new URL("http://www.experts-exchange.com/");
          URLConnection conn = ee.openConnection();
          DataInputStream dis = new DataInputStream(conn.getInputStream());
          String inputLine;

Alert(inputLine);

          while ((inputLine = dis.readLine()) != null) {
              // code that handles each line as it is read in
          }
          dis.close();
      } catch (MalformedURLException me) {
          // handle bad urls
      } catch (IOException ioe) {
          // handle IO errors when making connection or retrieve info etc
      }
%>

</BODY>
</HTML>
0
 

Author Comment

by:joelettuce
ID: 7105668
Thank you for the quick response.  The information provided was exactly as required.
0
 
LVL 19

Expert Comment

by:cheekycj
ID: 7105805
Glad I could help and Thanx for the "A".

CJ
0

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