java.lang.ClassCastException: oracle.sql.BLOB cannot be cast to oracle.sql.BLOB

Question

I have problem retrieving a blob object from oracle DB to java API with jdbc. The problem is when I execute a Collable statement with a function from the db which return me

Answer 1

I got this error while generating a jasper report.

I replaced the class=oracle.jdbc.OracleBlob with class=java.sql.Blob in the jrxml file of that report. It worked for me.

Answer 2

Sometime one JAR is in the application classpath and another is in the application server classpath (eg.: in Tomcat $CATALINA_HOME/lib)

Answer 3

Two oracle jar files may be in your classpath. Please remove one jar and deploy again.

Answer 4

Dont Cast again like:

BLOB tempBlob = (oracle.sql.BLOB)cstmt.getObject(1);

Solution :

OutputStream outstrm =(rs.getBlob(1)).setBinaryStream(1L);