?
Solved

Uploading a file

Posted on 2004-03-21
14
Medium Priority
?
228 Views
Last Modified: 2010-03-31
I need to store a file in database. How can I do this using java?
0
Comment
Question by:subysri
[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
  • 7
  • 4
14 Comments
 
LVL 30

Accepted Solution

by:
Mayank S earned 100 total points
ID: 10647429
You can get the contents into a byte array and store it. Have a look at:

http://javaalmanac.com/egs/java.sql/InsertBinary.html

- for storing/ reading binary data to/ from databases.
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10647537
You can make a FileInputStream and read from the file into a byte[] array.

File f = new File ( "filename" ) ;
FileInputStream fis = new FileInputStream ( f ) ; // or new FileInputStream ( "filename" ) ;
byte[] array = new byte[f.length ()] ;
fis.read ( array ) ;
0
 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 100 total points
ID: 10648062
You would be better to treat the insert as a stream, as in addition to not being an efficient way of making an insert, you may get out of memory errors if the file is too big if you try to load it all into memory as above. See

http://java.sun.com/j2se/1.4.2/docs/api/java/sql/PreparedStatement.html#setBinaryStream(int, java.io.InputStream, int)
0
Optimize your web performance

What's in the eBook?
- Full list of reasons for poor performance
- Ultimate measures to speed things up
- Primary web monitoring types
- KPIs you should be monitoring in order to increase your ROI

 
LVL 30

Expert Comment

by:Mayank S
ID: 10860205
Please proceed with that recommendation.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10860432
>>Accept: mayankeagle {http:#10647429}

Not the correct way to do it IMO
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10860537
Well, the main problem was to know how to insert the data - not about performance, I guess.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10860583
It's not a performance issue - it's about a potentially fatal memory problem. The approach i suggested doesn't suffer from this drawback
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10860654
Well - memory problems may or may not come. That's about optimizing your approach - the difference between "how to do it" and "how to do it best". I agree that your method is more efficient, but I assumed that this one only asks "how to do it" because it said nothing else ;-) So I didn't go into the details. The questioner should have responded if he faced memory problems, too.... anyways, I would be glad with a split.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10860754
>>The questioner should have responded if he faced memory problems,

That error may well occur only rarely, and may well be quite difficult to debug
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10865970
Yes, and yes ;-)
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 11683347
Please proceed with that recommendation.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…
Suggested Courses
Course of the Month12 days, 6 hours left to enroll

752 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