Solved

how to check if an image exist in another application

Posted on 2006-07-19
11
1,104 Views
Last Modified: 2011-10-03
I am trying to check if an image exists inanother application, if yes then show it otherwise don't show it.
I tried the below code but it is not working. It jst shows no image for all.

Any help will be greatly appreciated

<%
      file = new File("http://www.ccim.com/services/member/profile/pictures/"+next_record.getMember_ID()+".jpg");
      out.print(file);
      if(file.exists()){
%>
           <td nowrap width = '33%' align = 'right'>
                   <img src ="http://www.ccim.com/services/member/profile/pictures/<%=next_record.getMember_ID()%>.jpg" width="52" height="75">
           </td>
<%
       }else{
%>
                                                             
             <td nowrap width = '33%' align = 'right'>
           </td>
                                                            
<%
       }
%>
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
when I print the file it prints this out.print(file)
http:\www.ccim.com\services\member\profile\pictures\08914062.jpg (this is an image)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
http:\www.ccim.com\services\member\profile\pictures\00008477.jpg 
http:\www.ccim.com\services\member\profile\pictures\04688171.jpg 
http:\www.ccim.com\services\member\profile\pictures\06264205.jpg 
http:\www.ccim.com\services\member\profile\pictures\08901225.jpg 
http:\www.ccim.com\services\member\profile\pictures\08914062.jpg
0
Comment
Question by:huzefaq
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 5
11 Comments
 
LVL 12

Accepted Solution

by:
enachemc earned 350 total points
ID: 17138825
Try to Open a HTTP connection to that file. If you receive a 404 status response, it means that the image does not exist.
0
 
LVL 19

Assisted Solution

by:Kuldeepchaturvedi
Kuldeepchaturvedi earned 150 total points
ID: 17138967
instead of doing
file = new File("http://www.ccim.com/services/member/profile/pictures/"+next_record.getMember_ID()+".jpg");

you should do..

URL img = new URL("http://www.ccim.com/services/member/profile/pictures/"+next_record.getMember_ID()+".jpg");
try{
HttpURLConnection con = img.getConnection();
if(con.getResponseCode!=HttpURLConnection.HTTP_NOT_FOUND)
//image exist
else
//image does not exist
}
catch(IOException e)
{
//image does not exist
}

P.S. Please note that it is just an elaboration of what enachemc is saying in previous post.
0
 

Author Comment

by:huzefaq
ID: 17139356
Thanks guys but I am getting an error when i try this code

this is what I tried
----------------------------------------------------------------------------------------------------
<%@ page import="java.net.URL" %>
.
.
.

<%
URL img = new URL("http://www.ccim.com/services/member/profile/pictures/"+next_record.getMember_ID()+".jpg");
      try{
            HttpURLConnection con = img.getConnection();
            if(con.getResponseCode!=HttpURLConnection.HTTP_NOT_FOUND){ %>
                  <td nowrap width = '33%' align = 'right'>
                        <img src ="http://www.ccim.com/services/member/profile/pictures/<%=next_record.getMember_ID()%>.jpg" width="52" height="75">
                  </td>
            <%}else{ %>
                  <td nowrap width = '33%' align = 'right'></td>
            <% }
        }
      catch(IOException e)
      { %>
              <td nowrap width = '33%' align = 'right'></td>  
       <% }%>

------------------------------------------------------------------------------------------------------------------------------------------------------------------
I get this error
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
Unable to compile class for JSP

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
HttpURLConnection cannot be resolved to a type

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
The method getConnection() is undefined for the type URL

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
HttpURLConnection.HTTP_NOT_FOUND cannot be resolved to a type

An error occurred at line: 139 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
IOException cannot be resolved to a type

0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 12

Expert Comment

by:enachemc
ID: 17139410
it's java.net.HttpURLConnection.
0
 

Author Comment

by:huzefaq
ID: 17139444
I changed the import to

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

but I still get these error

--------------------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
The method getConnection() is undefined for the type URL

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
con.getResponseCode cannot be resolved or is not a field

An error occurred at line: 139 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
IOException cannot be resolved to a type

0
 
LVL 12

Expert Comment

by:enachemc
ID: 17139493
HttpURLConnection con = new HttpURLConnection(img);
0
 

Author Comment

by:huzefaq
ID: 17139719
Thanks, I changed the line but it still gives error

---------------------------------------------------------------------------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
Cannot instantiate the type HttpURLConnection

An error occurred at line: 127 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
con.getResponseCode cannot be resolved or is not a field

An error occurred at line: 139 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
IOException cannot be resolved to a type

-----------------------------------------------------------------------------------------------------------
0
 
LVL 12

Expert Comment

by:enachemc
ID: 17139767
sorry about that. Use :

HttpURLConnection con = (HttpURLConnection )img.openConnection();
0
 

Author Comment

by:huzefaq
ID: 17139866
no pro.

but it still gives this error. It looks like I need to import a java class for IOException. Would you know which one to import. thanks

-------------------------------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 139 in the jsp file: /templates_public/member_search_results.jsp
Generated servlet error:
IOException cannot be resolved to a type



0
 
LVL 12

Expert Comment

by:enachemc
ID: 17139892
java.io.IOException
0
 

Author Comment

by:huzefaq
ID: 17140006
it works.  Thanks
0

Featured Post

[Webinar] How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Let's recap what we learned from yesterday's Skyport Systems webinar.
Part One of the two-part Q&A series with MalwareTech.
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question