i made a call to download() method to save json into xml with extension ".svg". The jsondata is global variable store json.
public void download(){
File file = exportFile(jsondata);
HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
writeOutContent(response, file, file.getName());
FacesContext.getCurrentInstance().responseComplete();
FacesContext.getCurrentInstance().renderResponse();
}
and the exportFile(jsondata) is
public File exportFile(String jsonData){
File xmlFile = null;
try {
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
JSONObject jsonObject = new JSONObject(jsonData);
Element root = doc.createElement("web");
doc.appendChild(root);
Element rootElement1 = doc.createElement("class");
rootElement1.appendChild(doc.createTextNode(jsonObject.getString("class")));
root.appendChild(rootElement1);
JSONArray jsonArray1 = (JSONArray) jsonObject.get("nodes");
Element rootElement2 = doc.createElement("nodes");
root.appendChild(rootElement2);
for (int i = 0; i < jsonArray1.length(); i++) {
Element staff = doc.createElement("node");
rootElement2.appendChild(staff);
JSONObject childObject = (JSONObject) jsonArray1.get(i);
Iterator<String> keyItr = childObject.keys();
while (keyItr.hasNext()) {
String key = keyItr.next();
Element property = doc.createElement(key);
property.appendChild(doc.createTextNode(childObject.getString(key)));
staff.appendChild(property);
}
}
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
//for pretty print
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
DOMSource source = new DOMSource(doc);
xmlFile = new File("file.svg");
//write to console or file
// StreamResult console = new StreamResult(System.out);
StreamResult file = new StreamResult(xmlFile);
//write data
// transformer.transform(source, console);
transformer.transform(source, file);
} catch (Exception pce) {
pce.printStackTrace();
}
return xmlFile;
}
finally to write this one file writeOutContent()
public void writeOutContent(final HttpServletResponse res, final File content, final String theFilename) {
if (content == null) {
System.out.println("content is null");
return;
}
try {
res.setHeader("Content-Disposition", "attachment; filename=\"" + theFilename + "\"");
System.out.println("res " + res.getHeader("attachment; filename=\"" + theFilename + "\""));
res.setContentType("application/octet-stream");
FileInputStream fis = new FileInputStream(content);
OutputStream os = res.getOutputStream();
int bt = fis.read();
while (bt != -1) {
os.write(bt);
bt = fis.read();
}
os.flush();
fis.close();
os.close();
} catch (Exception ex) {
Logger.getLogger(DownloadFile.class.getName()).log(Level.SEVERE, null, ex);
}
}
i can see the xml in console but what am doing wrong that its not downloading?? please help me. thanks in advance.
