从Oracle中读取Job_Data参数

    protected Object getObjectFromBlob(ResultSet rs, String colName)
        throws ClassNotFoundException, IOException, SQLException {
        Object obj = null;
        Blob blobLocator = rs.getBlob(colName);
        if (blobLocator != null && blobLocator.length() != 0) {
            InputStream binaryInput = blobLocator.getBinaryStream();
            if (null != binaryInput) {
                if (binaryInput instanceof ByteArrayInputStream
                    && ((ByteArrayInputStream) binaryInput).available() == 0 ) {
                    //do nothing
                } else {
                    ObjectInputStream in = new ObjectInputStream(binaryInput);
                    try {
                        obj = in.readObject();
                    } finally {
                        in.close();
                    }
                }
            }
        }
        return obj;
    }