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POgetting null pointer exception exporting data from database to xml
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2013-03-29T19:30:16.020
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2014-05-27T09:36:11.923
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2013-03-29T20:49:50.890
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Body
Im trying this java code to export data from database using sql query, But getting a null pointer exception. getting no clue to remove it . Im getting this exception at the line in Bold font. <pre><code>try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.newDocument(); Element results = doc.createElement("Results"); doc.appendChild(results); Class.forName("oracle.jdbc.OracleDriver"); Connection con = DriverManager .getConnection("jdbc:oracle:thin:@localhost:1521:XE", "hr", "hr"); ResultSet rs = con.createStatement().executeQuery("select * from departments"); ResultSetMetaData rsmd = rs.getMetaData(); int colCount = rsmd.getColumnCount(); while (rs.next()) { Element row = doc.createElement("Row"); results.appendChild(row); for (int i = 1; i <= colCount; i++) { String columnName = rsmd.getColumnName(i); Object value = rs.getObject(i); Element node = doc.createElement(columnName); row.appendChild(node); **node.appendChild(doc.createTextNode(value.toString()));** } } DOMSource domSource = new DOMSource(doc); TransformerFactory tf = TransformerFactory.newInstance(); Transformer transformer = tf.newTransformer(); transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); transformer.setOutputProperty(OutputKeys.METHOD, "xml"); transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1"); StringWriter sw = new StringWriter(); StreamResult sr = new StreamResult(sw); transformer.transform(domSource, sr); System.out.println(sw.toString()); con.close(); rs.close(); } catch (Exception e) { e.printStackTrace(); } </code></pre> Stack trace : <pre><code>java.lang.NullPointerException at org.ProjectXML.ui.DataBaseToXML.main(DataBaseToXML.java:61) </code></pre> Any ideas?
Tags
<java><sql><xml><dom><jdbc>
Title
getting null pointer exception exporting data from database to xml
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Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.