CREATE TABLE test_blob(bf BLOB);
/
CREATE PROCEDURE ins_blob(P_BLOB BLOB)
IS
BEGIN
   INSERT INTO test_blob (bf) VALUES (P_BLOB);
END;
/

    public static void main(String[] args) throws SQLException, IOException {
        dbconn = DriverManager.getConnection(baseAdress, baseUser, basePassword);
        callStms = dbconn.prepareCall("{call ins_blob(?)}");                
        
        oracle.sql.BLOB b = oracle.sql.BLOB.createTemporary(dbconn, true, oracle.sql.BLOB.DURATION_SESSION);
        
        OutputStream os = b.setBinaryStream(0L);
        try {       
            os.write("test12345".getBytes());                    
            callStms.setBlob(1, b);
            callStms.executeQuery();
        } finally {
            os.flush();
            os.close();
        } 
    }