Java XPath umlaut/vowel parsing

问题

I want to parse the following xml structure:

<?xml version="1.0" encoding="utf-8"?>
<documents>
  <document>
    <element name="title">
      <value><![CDATA[Personnel changes: Müller]]></value>
    </element>
  </document>
</documents>

For parsing this element name="????? structure I use XPath in the following way:

XPath xPath = XPathFactory.newInstance().newXPath();

String currentString = (String) xPath.evaluate("/documents/document/element[@name='title']/value",pCurrentXMLAsDOM, XPathConstants.STRING);

The parsing itself works fine, but there are just some problems with german umlauts (vowels) like "Ü", "ß" or something like this. When I print out currentString the String is:

Personnel changes: MÃ¼ller

But I want to have the String like in the Xml:

Personnel changes: Müller

Just to add: I cant change the content of the xml file, I have to parse it like I get it, so I definitely have to parse everey String in the correct way.

回答1:

Sounds like an encoding problem. The XML is UTF-8 encoded Unicode which you seem to print encoded as ISO-8859-1. Check the encoding settings of your Java source.

Edit: See Setting the default Java character encoding? for how to set file.encoding.

回答2:

I found a good and fast solution now:

public static String convertXMLToString(File pCurrentXML) {

        InputStream is = null;
        try {
            is = new FileInputStream(pCurrentXML);
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        }
        String contents = null;
         try {

                try {
                    contents = IOUtils.toString(is, "UTF-8");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } finally {
                IOUtils.closeQuietly(is);
            }

        return contents;

    }

Afterwars I convert the String to a DOM object:

static Document convertStringToXMLDocumentObject(String string) {

        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = null;
        Document document = null;

        try {
            builder = factory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }

        try {
            document = builder.parse(new InputSource(new StringReader(string)));
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return document;

    }

And then I can just parse the DOM with XPath for example and all element values are in UTF-8!! Demonstration:

currentString = (String) xPath.evaluate("/documents/document/element[@name='title']/value",pCurrentXMLAsDOM, XPathConstants.STRING);
System.out.println(currentString);

Output:

Personnel changes: Müller

回答3:

if you know file is utf8 encoded try something like :

    FileInputStream fis = new FileInputStream("yourfile.xml");
    InputStreamReader in = new InputStreamReader(fis, "UTF-8");

    InputSource pCurrentXMLAsDOM = new InputSource(in);

来源：https://stackoverflow.com/questions/11861630/java-xpath-umlaut-vowel-parsing

标签

java

parsing

xpath