Develop Reference

Special characteres error on saving XML file in Java ("<" and ">")

I am trying to edit a specific key inside an XML file. The problem is that after the file is saved, the '<' and '>' characters are transformed in coded characters (respectively: "& lt;" and "& gt;").
XML File:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
</configSections>
<system.web>
<httpRuntime targetFramework="X.X"/>
</system.web>
<connectionStrings>
<add connectionString="Data Source=XXXX;user Id=YYYYY;password=ZZZZZ;" name="Entities" providerName="Oracle.ManagedDataAccess.Client"/>
</connectionStrings>
</configuration>
I'm updating the value of the entire connectionStrings key:
package br.com.sedna.bitbucket.plugin.enviromentsetup.utils;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.xml.sax.InputSource;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class ModifyXmlFile {
private File _inputFile;
private String _filePath;
private DocumentBuilderFactory _docFactory;
private DocumentBuilder _docBuilder;
private Document _doc;
private Node _xmlObject;
private String CONNECTION_STRINGS = "<add connectionString=\"Data Source=XXXX;user Id=%s;password=ZZZZZ;\" name=\"Entities\" providerName=\"Oracle.ManagedDataAccess.Client\"/>";
public ModifyXmlFile(String xmlPath){
try {
this._filePath = xmlPath;
this._inputFile = new File(this._filePath);
this._docFactory = DocumentBuilderFactory.newInstance();
this._docBuilder = _docFactory.newDocumentBuilder();
this._doc = _docBuilder.parse(_inputFile);
this._xmlObject = _doc.getFirstChild();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public ModifyXmlFile setNodeValue(String nodeName, String nodeValue){
Node nodeNameObject = this._doc.getElementsByTagName(nodeName).item(0);
try {
// updating the value of connectionStrings key
nodeNameObject.setTextContent(String.format(CONNECTION_STRINGS, nodeValue));
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer;
transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
DOMSource source = new DOMSource(this._doc);
StreamResult consoleResult = new StreamResult(new File(this._filePath));
transformer.transform(source, consoleResult);
System.out.println("Done");
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return this;
}
}
Running this class:
ModifyXmlFile xmlHelper = new ModifyXmlFile("C:\\Web.config");
xmlHelper.setNodeValue("connectionStrings", "NEWVALUE");
The result:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
</configSections>
<system.web>
<httpRuntime targetFramework="X.X"/>
</system.web>
<connectionStrings><add connectionString="Data Source=XXXX;user Id=NEWVALUE;password=ZZZZZ;" name="Entities" providerName="Oracle.ManagedDataAccess.Client"/></connectionStrings>
</connectionStrings>
</configuration>
I have tried changing the encode type without success.

I have modified the setNodeValue method. The relevant part follows:
public ModifyXmlFile setElementAttributeValue(String nodeXPath, String attributeName, String newAttributeValue) throws XPathExpressionException{
try {
XPath xPath = XPathFactory.newInstance().newXPath();
Node node = (Node)xPath.evaluate(nodeXPath, _doc, XPathConstants.NODE);
node.getAttributes().getNamedItem(attributeName).setNodeValue(String.format(CONNECTION_STRINGS, newAttributeValue));
Calling this via
setElementAttributeValue("/configuration/connectionStrings/add", "connectionString", "NEWVALUE" );
changes the value of the attribute connectionString on the element add.
There are several problems in the original code:
the consoleResult is named confusingly - the StreamResult points to a file
the parameter nodeName actually stands for parent node of the element to be edited and this is indeed what is retrieved per this._doc.getElementsByTagName(nodeName).item(0) - at least when setNodeValue is called with "connectionStrings" for nodeName.
the name of the attribute to be edited is hard-wired into the code.
as T.J. Crowder mentioned, the setTextContent method the original code is calling is used to set text content, i.e. the text between >< of some element. It is neccessary to distinguish between elements, attributes and text content and be aware of the fact that these are not interchangeable. It is not possible to add new element by adding text content which looks like (is formatted like) an element.
Please note that the new code is not production ready as at the very least the handling of potential null values would need to be added, e.g. on the result of getNamedItem(attributeName).

Can't make Java created XML work with XSL

I'm creating an XML using DOM, I open the XML with explorer and it seems fine.
After that I created an XSL for it, add the reference to it programatically to the XML and boom, it works no longer.
I inspect the code in the browser and save the file as XML.
I open the XML with notepad++ and noticed the npp shows the XML file is encoded in "UCS-2 LE BOM" even though the XML header sais it's in "UTF-8", I don't know if this has to do with being saved from the browser or it's because of Java transformer.File encoding according to npp
Anyway, I change the file encoding in npp to "UTF-8", open it again and it works flawlessly.
I've tried changing the transformer's encoding property transformer.setOutputProperty("encoding", "ISO-8859-1") to different values but it will just change the XML header.
I googled around but I haven't found anything that's worked so far.
This is the code where the XML is created
package modelo;
import java.awt.Desktop;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
public class DAOXML {
private static final String rutaUno = ".\\VerLibro.xml";
private static final String rutaListado = ".\\listado.xml";
public static boolean toXML(ArrayList<Libro> libros2) {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
final String rutaActual = libros2.size()>1?rutaListado:rutaUno;
try {
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.newDocument();
doc.setDocumentURI(rutaActual);
doc.setXmlStandalone(true);
Element libros = doc.createElement("libros");
for(Libro l : libros2) {
Element libro = doc.createElement("libro");
Element isbn = doc.createElement("isbn");
isbn.setTextContent(l.getISBN());
libro.appendChild(isbn);
Element editorial = doc.createElement("editorial_apellidos");
editorial.setTextContent(l.getEditorial_apellidos());
libro.appendChild(editorial);
Element autor = doc.createElement("autor");
autor.setTextContent(l.getAutor());
libro.appendChild(autor);
Element categoria = doc.createElement("categoria");
categoria.setTextContent(l.getCategoria());
libro.appendChild(categoria);
Element titulo = doc.createElement("titulo");
titulo.setTextContent(l.getTitulo());
libro.appendChild(titulo);
Element ubicacion = doc.createElement("ubicacion");
ubicacion.setTextContent(l.getUbiacion());
libro.appendChild(ubicacion);
libros.appendChild(libro);
}
doc.appendChild(libros);
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
// transformer.setOutputProperty("encoding", "ISO-8859-1");
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File(rutaActual));
//result.setWriter(new PrintWriter(new File(rutaActual), "UTF-8"));
transformer.transform(source, result);
if(rutaActual == rutaUno) {
Node pi = doc.createProcessingInstruction("xml-stylesheet", "type=\"text/xsl\" href=\"VerLibro.xsl\"");
doc.insertBefore(pi, libros);
}
else {
Node pi = doc.createProcessingInstruction("xml-stylesheet", "type=\"text/xsl\" href=\"listado.xsl\"");
doc.insertBefore(pi, libros);
}
Desktop.getDesktop().open(new File(rutaActual));
return true;
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
}
Thanks in advance.

Try adding this line before you call transform():
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");

update xml with xpath

I want to change the rating of jojo restaurant only , i tried this code but didn't work please help. Below is my xml document and the code I have.
<city>
<beirut>
<restaurant>
<name>sada</name>
</restaurant>
</beirut>
<jbeil>
<restaurant>
<name>toto</name>
<rating>4.3/5</rating>
</restaurant>
<restaurant>
<name>jojo</name>
<rating>4.3/5</rating>
</restaurant>
</jbeil>
<sour>
<restaurant>
<name>sada</name>
</restaurant>
</sour>
</city>
Code:
try {
File inputFile = new File("src/xpath/josephXml.xml");
DocumentBuilderFactory dbFactory
= DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder;
dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
XPath xPath = XPathFactory.newInstance().newXPath();
String expression = "/City/Jbeil/Restaurants/Restaurant[name='Feniqia']/rating";
Element e = (Element)xPath.evaluate(expression, doc, XPathConstants.NODE);
if (e != null){
e.setTextContent("5/5");
}
} catch (ParserConfigurationException | SAXException | IOException e) {
}

if you only need to write the result (there are other ways):
import java.io.File;
import org.w3c.dom.Document;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
try
{
Transformer trans = TransformerFactory.newInstance().newTransformer();
Result out = new StreamResult(new File("result.xml"));
Source in = new DOMSource(doc);
trans.transform(in, out);
}
catch (Exception exe)
{
System.err.println(exe.getMessage());
}

First, your XPath did not align to your posted XML (no <restaurants> or Feniqia name) and all should have been lower case. Possibly you extracted a piece from large xml document. For demonstration, I used the jojo restaurant.
Second, XPath does not itself update an XML, you will need to create a new document. Simply add a transformation at end:
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import javax.xml.xpath.*;
import java.io.File;
import java.io.IOException;
import org.xml.sax.*;
import org.w3c.dom.*;
public class RatingUpdate {
public static void main(String [] args) {
try {
File inputFile = new File("src/xpath/josephXml.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder;
dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
XPath xPath = XPathFactory.newInstance().newXPath();
String expression = "/city/jbeil/restaurant[name='jojo']/rating";
Element e = (Element)xPath.evaluate(expression, doc, XPathConstants.NODE);
if (e != null){
e.setTextContent("5/5");
}
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(new DOMSource(doc), new StreamResult(new File("src/xpath/josephXml_update.xml")));
} catch (ParserConfigurationException | SAXException | IOException | XPathExpressionException |
TransformerException e) {
}
}
}

Writing (overriding) same XML file that I read

I made a method to read XML files, but now I need to write or override that same XML file with the same tags, nodes and objects, but with different data inside child nodes.
First I want to make read and write working and then I have some ideas to maybe put the whole XML file into a buffer. Then I could put the whole XML under one class and just write that class again into the same XML this is just an idea, any suggestion or idea is welcome.
My XML file looks like this:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Document Root -->
<DATA>
<Settings USERNAME="test" PASSWORD="test" STATUS="active" / >
</DATA>
This is my code for reading:
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
public class Read {
private final static String SETTINGS_LINE = Settings;
public void readXML() {
try {
File xmlFile = new File("Test.xml");
DocumentBuilderFactory documentFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentFactory.newDocumentBuilder();
Document doc = documentBuilder.parse(xmlFile);
// Normalize the XML file
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getDocumentElement().getChildNodes();
for(int temp = 0; temp < nodeList.getLength(); temp++) {
Node node = nodeList.item(temp);
if(node instanceof Element && node.getNodeName() == SETTINGS_LINE) {
Element settings = (Element) node;
System.out.println("User" +settings.getAttribute("USERNAME"));
System.out.println("Password" +settings.getAttribute("PASSWORD"));
System.out.println("Status" +settings.getAttribute("STATUS"));
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
And this is the code for writing that is not working:
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class Modify {
private final static String SETTINGS_LINE = "Settings";
public static void main(String argv[]) {
try {
String filepath = "test.xml";
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
// Normalize the XML File
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getDocumentElement().getChildNodes();
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
if (node instanceof Element && node.getNodeName() == SETTINGS_LINE) {
Element settings = (Element) node;
if("USERNAME".equals(node.getChildNodes())){
node.setTextContent("mivnadic");
}
}
// Write the content into xml file
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File(filepath));
transformer.transform(source, result);
}
System.out.println("File saved");
} catch (ParserConfigurationException pce) {
pce.printStackTrace();
} catch (TransformerException tfe) {
tfe.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (SAXException sae) {
sae.printStackTrace();
}
}
}

Storing sql query in xml file

I want to store sql query in tree format in xml file.I wrote a code which split the code into different tokens and store it in xml file.I am storing keywords like "select",from,where etc as xmlelements and the values of these keywords as textnodes inside corresponding elements.When the query contains single single statement it works as i need.but when nested query occurs i want to store the nested query inside "where" element.In that case the code didn't works properly.I am hereby attaching the code.
Can anyone point out logical mistakes in my code????
Second problem is that when i try to store the xmldata in "CreateFiles.xml" file ,the file is not displaying in the corresponding folder.what is the reason for that?
CreateXml.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package Work;
import java.io.File;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
*
* #author user
*/
public class Createxmls {
public void CreateXML() throws ParserConfigurationException, TransformerConfigurationException, TransformerException {
DocumentBuilderFactory documentFactory = DocumentBuilderFactory
.newInstance();
DocumentBuilder documentBuilder = documentFactory
.newDocumentBuilder();
Document document = documentBuilder.newDocument();
Element rootElement = document.createElement("SQLStatement");
document.appendChild(rootElement);
Element stmt = document.createElement("SQLStatement");
rootElement.appendChild(stmt);
Element Element = document.createElement("null");
String tokens[] = {"select", "max(id)", "from", "facedictionary", "where", "id = (",
"select", "id", "from", "facedetails", "where", "id like 34 group by id)"};
for (int i = 0; i < tokens.length; i++) {
System.out.println("tok:" + tokens[i]);
if (tokens[i].equalsIgnoreCase("select") || tokens[i].equalsIgnoreCase("from") || tokens[i].equalsIgnoreCase("where")) {
Element = document.createElement(tokens[i]);
stmt.appendChild(Element);
} else {
Element.appendChild(document.createTextNode(tokens[i]));
stmt.appendChild(Element);
}
}
String xmlstring = "";
TransformerFactory transformerFactory = TransformerFactory
.newInstance();
Transformer transformer = transformerFactory.newTransformer();
StreamResult streamResult = new StreamResult(new File(
"createFile.xml"));
StringWriter sw = new StringWriter();
Transformer serializer = TransformerFactory.newInstance().newTransformer();
serializer.transform(new DOMSource(document), new StreamResult(sw));
xmlstring = sw.toString();
System.out.println(xmlstring);
DOMSource domSource = new DOMSource(stmt);
transformer.transform(domSource, streamResult);
System.out.println("File saved to specified path!");
}
public static void main(String arg[]) {
try {
Createxmls xml = new Createxmls();
xml.CreateXML();
} catch (ParserConfigurationException ex) {
Logger.getLogger(Createxmls.class.getName()).log(Level.SEVERE, null, ex);
} catch (TransformerConfigurationException ex) {
Logger.getLogger(Createxmls.class.getName()).log(Level.SEVERE, null, ex);
} catch (TransformerException ex) {
Logger.getLogger(Createxmls.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
When i displayed the contents of xml file for the query:
"select max(id) from facedictionary where id = (select id from facedetails where id like 34 group by id))
The result i got
<?xml version="1.0" encoding="UTF-8"?>
-<SQLStatement>
<select>max(id)</select>
<from>facedictionary</from>
<where>id = (</where>
<select>id</select>
<from>facedetails</from>
<where>id like 34 group by id)</where>
</SQLStatement>
The result i need:
<?xml version="1.0" encoding="UTF-8"?>
-<SQLStatement>
<select>max(id)</select>
<from>facedictionary</from>
<where>id = (
<select>id</select>
<from>facedetails</from>
<where>id like 34 group by id)</where>
</where>
</SQLStatement>