How to store file content in BLOB field MySql database using java

Hi!
i want to store the file content in a BLOB field in MySql database using java.
Please help me out..........
thanx in advance...
bye

i stored images in db, and retrieved them. like that cant i store pdf file in db, and retrieve it back using oracle db?
Plz help me out how to put a file in db. i need complete code. thanks in advance.

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How to save file content in BLOB using ODI?

We have unix server where the files are stored in a particular directory.
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One column will have filename & in another column i need to store file content(whatever that file has) which should be a BLOB type.
There is no restriction on file type,it could be .txt,.xls,.jpg.
Need help
Edited by: user11090018 on Jun 9, 2010 4:24 AM
Edited by: user11090018 on Jun 10, 2010 10:22 PM

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How to Convert the content in BLOB field into a PDF file...

Hi,
I am having PDF files stored in BLOB column of a table in Oracle Database (11G R2).
I want to retrieve the files back and store them in hard disk. I am successful in storing the content as a file with '.doc' but if I store the file as '.pdf', adobe fails to open the file with error
Adobe Reader could not open file 'xxx.pdf' because it is either not a supported file type or because the file has been damaged (for example it was sent as an email attachment and wasn't correctly decoded)
I am using following example code to achieve my goal...
Declare
b blob;
c clob;
buffer VARCHAR2(32767);
buffer_size CONSTANT BINARY_INTEGER := 32767;
amount BINARY_INTEGER;
offset NUMBER(38);
file_handle UTL_FILE.FILE_TYPE;
begin
select blob_data into b from blobdata where id=1;
c := blob2clob(b);
file_handle := UTL_FILE.FOPEN('BLOB2FILE','my_file.pdf','w',buffer_size);
     amount := buffer_size;
     offset := 1;
     WHILE amount >= buffer_size
     LOOP
          DBMS_LOB.READ(c,amount,offset,buffer);
          -- buffer:=replace(buffer,chr(13),'');
          offset := offset + amount;
          UTL_FILE.PUT(file_handle,buffer);
          UTL_FILE.FFLUSH(file_handle);
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     UTL_FILE.FCLOSE(file_handle);
end;
create or replace FUNCTION BLOB2CLOB ( p_blob IN BLOB ) RETURN CLOB
-- typecasts BLOB to CLOB (binary conversion)
IS
|| Purpose : To Convert a BLOB File to CLOB File
|| INPUT : BLOB File
|| OUTPUT : CLOB File
|| History: MB V5.0 24.09.2007 RCMS00318572 Initial version
ln_file_check NUMBER;
ln_file_size NUMBER;
v_text_file CLOB;
v_binary_file BLOB;
v_dest_offset INTEGER := 1;
v_src_offset INTEGER := 1;
v_warning INTEGER;
lv_data CLOB;
ln_length NUMBER;
csid VARCHAR2(100) := DBMS_LOB.DEFAULT_CSID;
V_LANG_CONTEXT NUMBER := DBMS_LOB.DEFAULT_LANG_CTX;
BEGIN
DBMS_LOB.createtemporary (v_text_file, TRUE);
SELECT dbms_lob.getlength(p_blob) INTO ln_file_size FROM DUAL;
DBMS_LOB.converttoclob (v_text_file, p_blob, ln_file_size, v_dest_offset, v_src_offset, 0, v_lang_context, v_warning);
SELECT dbms_lob.getlength(v_text_file) INTO ln_length FROM DUAL;
RETURN v_text_file;
END;

user755667 wrote:
Hi,
I am having PDF files stored in BLOB column of a table in Oracle Database (11G R2).
I want to retrieve the files back and store them in hard disk. I am successful in storing the content as a file with '.doc' but if I store the file as '.pdf', adobe fails to open the file with error
Adobe Reader could not open file 'xxx.pdf' because it is either not a supported file type or because the file has been damaged (for example it was sent as an email attachment and wasn't correctly decoded)
I am using following example code to achieve my goal...
Declare
b blob;
c clob;
buffer VARCHAR2(32767);
buffer_size CONSTANT BINARY_INTEGER := 32767;
amount BINARY_INTEGER;
offset NUMBER(38);
file_handle UTL_FILE.FILE_TYPE;
begin
select blob_data into b from blobdata where id=1;
c := blob2clob(b);
file_handle := UTL_FILE.FOPEN('BLOB2FILE','my_file.pdf','w',buffer_size);
     amount := buffer_size;
     offset := 1;
     WHILE amount >= buffer_size
     LOOP
          DBMS_LOB.READ(c,amount,offset,buffer);
          -- buffer:=replace(buffer,chr(13),'');
          offset := offset + amount;
          UTL_FILE.PUT(file_handle,buffer);
          UTL_FILE.FFLUSH(file_handle);
     END LOOP;
     UTL_FILE.FCLOSE(file_handle);
end;
create or replace FUNCTION BLOB2CLOB ( p_blob IN BLOB ) RETURN CLOB
-- typecasts BLOB to CLOB (binary conversion)
IS
|| Purpose : To Convert a BLOB File to CLOB File
|| INPUT : BLOB File
|| OUTPUT : CLOB File
|| History: MB V5.0 24.09.2007 RCMS00318572 Initial version
ln_file_check NUMBER;
ln_file_size NUMBER;
v_text_file CLOB;
v_binary_file BLOB;
v_dest_offset INTEGER := 1;
v_src_offset INTEGER := 1;
v_warning INTEGER;
lv_data CLOB;
ln_length NUMBER;
csid VARCHAR2(100) := DBMS_LOB.DEFAULT_CSID;
V_LANG_CONTEXT NUMBER := DBMS_LOB.DEFAULT_LANG_CTX;
BEGIN
DBMS_LOB.createtemporary (v_text_file, TRUE);
SELECT dbms_lob.getlength(p_blob) INTO ln_file_size FROM DUAL;
DBMS_LOB.converttoclob (v_text_file, p_blob, ln_file_size, v_dest_offset, v_src_offset, 0, v_lang_context, v_warning);
SELECT dbms_lob.getlength(v_text_file) INTO ln_length FROM DUAL;
RETURN v_text_file;
END;I skimmed this and stopped reading when i saw the BLOB to CLOB function.
You can't convert binary data into character based data.
So very likely this is your problem.

How to store images in BLOB field in MySql database using java

Hi....
Currently am able to store character string into BLOB using byte array....in MySql.
but i cannot store images or pictures.......
to do this.........please help me out...............
Thanx..........:)Bye...........

Hello,
I have done this for Oracle but it should be similar in MySQL also. Try reading thru these links below. Mail us if you have succeeded or not.
http://forum.java.sun.com/thread.jspa?forumID=48&threadID=654086
http://forum.java.sun.com/thread.jspa?forumID=48&threadID=384768
http://forum.java.sun.com/thread.jspa?forumID=48&threadID=549705
Thanks and regards,
Pazhanikanthan. P

How to verify if user already exists in MySQL database using JSP?

Hi, I am trying to create a website that allows users to register and then login. All regsitration details are stored in a MySQL table and I am attempting to have a java bean check that a new user does not already exist by looking up the username. However, I cannot get this to work, the bean is allowing anyone through. I believe there may be a problem with my while loop as the bean checks through the stored usernames in the database. Any suggestions appreciated thanks. See my code below:[
code]package foo;
import java.sql.*;
import java.util.*;
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userName="";
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Hmm, tried that and now have more build errors in the finally section.
init:
deps-jar:
Compiling 1 source file to C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\build\classes
C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\test\FormBean.java:57: cannot resolve symbol
symbol : variable rst
location: class foo.FormBean
          if (rst != null) rst.close();
C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\test\FormBean.java:57: cannot resolve symbol
symbol : variable rst
location: class foo.FormBean
          if (rst != null) rst.close();
C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\test\FormBean.java:58: cannot resolve symbol
symbol : variable stat
location: class foo.FormBean
          if (stat != null) stat.close();
C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\test\FormBean.java:58: cannot resolve symbol
symbol : variable stat
location: class foo.FormBean
          if (stat != null) stat.close();
C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\test\FormBean.java:59: cannot resolve symbol
symbol : variable conn
location: class foo.FormBean
          if (conn != null) conn.close();
C:\resin-2.1.11\doc\examples\basic\WEB-INF\classes\JavaLibrary1\test\FormBean.java:59: cannot resolve symbol
symbol : variable conn
location: class foo.FormBean
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6 errors
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How do you query Oracle RDF database using Java program?

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How to store the contents of a file

Hi,
I'm using forms6i and database 10g.
Through forms if a user selects a filename , and clicks a button or something,
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Please help me do this..
Thanks

Do you really want to save the "Content" of a file or the file itself? If you try to save the contents of a .doc or .pdf in a column with a VARCHAR2 datatype, you are going to corrupt the contents of the file since these file types have binary data in them as well as text. I think you would have greater success storing the actual file in a BLOB column.
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If someone's response is helpful or correct, please mark it accordingly.

How To Store pdf or doc file in Oracle Database using Java Jdbc?

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Hi.. i am not getting error, But i am not getting the original contents from my file. i am getting all ASCII vales, instead of my original data. here i am including my code.
for Adding PDF in DB i used image.jsp
Database table structure (table name. pictures )
Name Null? Type
ID NOT NULL NUMBER(11)
IMAGE BLOB
<%@ page language="java" import="java.util.*,java.sql.*,java.io.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
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<%
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File file =
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O/P: PDF inserted successfully
i tried to display that pdf using servlet. i am giving the code below.
import java.io.IOException;
import java.sql.*;
import java.io.*;
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import javax.servlet.http.HttpServletRequest;
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OP
PDF-1.4 %âãÏÓ 2 0 obj <>stream x+är á26S°00SIá2PÐ5´1ôÝ BÒ¸4Ü2KüsSSS4C²ê Pkø$VãGÒU×713CkW )(Ü endstream endobj 4 0 obj <>>>/MediaBox[0 0 595 842]>> endobj 1 0 obj <> endobj 3 0 obj <> endobj 5 0 obj <> endobj 6 0 obj <> endobj xref 0 7 0000000000 65535 f 0000000325 00000 n 0000000015 00000 n 0000000413 00000 n 0000000168 00000 n 0000000464 00000 n 0000000509 00000 n trailer <<01b2fa8b70ac262bfa939cc786f8770c>]/Root 5 0 R/Size 7/Info 6 0 R>> startxref 641 %%EOF
plz help me out.

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Are you looking for something like this?
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I have a problem to transfer a XML file content to a MS SQL database by a given/fixed stored procedure. I'm able to transfer the content of the file by using following method ...
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resCode = DBClosePreparedSQL (hstmt);
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KR Cake
Solved!
Go to Solution.

After some additional trials I found a solution by calling the stored procedure in this way
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2. Where on the server that files can be stored?
3. How to let clients download files when they are asked to be viewed?

Look at the Jakarta Commons FileUpload package.

How to display and save a picture stored as BLOB in MySQL database in Jsp?

Hello i am doing a dataentry form where in i will display the picture stored as Blob in MySQL database to the browser. The form also allow changing the picture and updating the picture Blob in the database.
How can i do it? I try this
<img src'"<%=rs.getBlob("picture")%> but it doesn't display the picture.
another thing, how can i save it in the database, if is use the file field in the html form?
thanks in advance for your help.

Hello i am doing a dataentry form where in i will display the picture stored as Blob in MySQL database to the browser. The form also allow changing the picture and updating the picture Blob in the database.
How can i do it? I try this
<img src'"<%=rs.getBlob("picture")%> but it doesn't display the picture.
another thing, how can i save it in the database, if is use the file field in the html form?
thanks in advance for your help.

Uploading the file as a blob to oracle database

Hi..I wrote a program to upload the files as a blob to the database. It works fine for JSP files but when i try to upload a css file...it gives "No more data to read from socket" exception. I have tried all combinations like trying to upload css file first and then a jsp file and then multiple jsp file and then a css file and so on, thinking that it might be a storage problem. But it gives an error only for the css files...could there be any delimiter kind of symbol or something in the css file which make the oracle think that it is the end of file? Just a guess...any help is appreciated...
n btw i upload the file using the file input stream and then i use preparedStatement.setBinaryStream method ....
TIA

Damn it...I cant believe that i took this long to figure it out...the maximum size of the file that my blob can store is 4 kb...and all my css files are bigger than that...wasted so many hours on this...:(

How to store images in database using java

hii
how to store images in database using java..........
Message was edited by:
naveennaga

I asked a similar question once and the answer I got was - Don't.
Instead, store the images on a drive somewhere and store the path in the database.
But I'm no expert - that's just what I was told by someone who does this kind of stuff a lot.
Hope that helps.

How to store file content in BLOB field MySql database using java

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