Now, i can put blob into file, but ...............

Question

Hi
At first, Thanks Lawrence Guros , from his hint, i did it(put blob into file) using JDBC.
In addition i find that, using sql*loader "load" a file(150Mb) into database ,need 3 minutes . Using jdbc "take out" the same file ,need 1.5 minutes. Does jdbc is better than sql*loader ?
So that i tried to load a file using jdbc, i got a problem.......
My environment:windows 2000pro,JBuilder 5.0 enterprise,oracle 8.1.6,(not install oracle jdbc driver )
a part of program(my program is very uglily,if anyone want,later i paste it ba....~_~)
// Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
// Statement stmt2=null;
// Resultset rs2;
//opa1 is the blob data
void saveBlobTableToDisk(Connection con) {
try {
stmt2=con.createStatement();
sqlStr2="SELECT * FROM emp3 where id=1004";
rs2=stmt2.executeQuery(sqlStr2);
while (rs2.next()) {
Blob aBlob=rs2.getBlob("opa1");
i got the exception :
" null
java.lang.UnsupportedOperationException
     at sun.jdbc.odbc.JdbcOdbcResultSet.getBlob(JdbcOdbcResultSet.java:4174)
     at test3.Frame1.saveBlobTableToDisk(Frame1.java:48)
     at test3.Frame1.<init>(Frame1.java:26)
     at test3.Application1.<init>(Application1.java:5)
     at test3.Application1.main(Application1.java:8) "
and the windows pop up a messagebox said that(about) my memory "0x09af007f" could not read, error in javaw.exe .
Later i used (ResultSet)getBinaryStream() to solve it. but getBinaryStream() only return a InputStream,so that i can make blob to a file,but i can't make a file to blob using jdbc.....
I am very stupid that installing sun java, oracle jdbc driver etc....(because i must set a lot of thing such as classpath,java_home etc), Can i only use JBuilder to do that ?
Or i must install oracle jdbc driver ?
Thanks.
D.T.

Answer 1

I would think that SQl*Loader would be faster, but you may want to ask in the SQL*Loader forum for more expert advice.
I can't tell from your code what you are doing. Is the "opa1" column a image folumn or a straight blob? Which line is 48?
I only have experience with the oracle JDBC driver. You should be able to use it with jBuilder.
there is an example of loading an image into an ordimage type at:
http://otn.oracle.com/training/products/intermedia/media_dev_kit/java_samples_readme.html
and a more extensive web based photo album:
http://otn.oracle.com/sample_code/products/intermedia/htdocs/intermedia_servlet_jsp_samples/imedia_servlet_jsp_readme.htm
And for bulk loading:
http://otn.oracle.com/sample_code/products/intermedia/htdocs/avi_bulk_loading.html