Validate string as XML in Java

Question

String strXML ="<?xml version='1.0' encoding='UTF-8' standalone='yes'?><custDtl><name>abc</name><mobNo>9876543210</mobNo></custDtl>"

how to validate whether the string is a proper XML String.

Configuration

possible duplicate from #6363426 – Quote

With a validating XML parser, of course. – Introvert

I am able to validate a XML File using SAXParserFactory and SAXParserException. but unable to parse String XML – Configuration

Also I tried JAXB UnMarshaller for String XML Parsing & it is throwing SAXParserException i am not able to handle.. – Configuration

Validating a string is not the same as validating a file, not a duplicate. – Coursing

Answer 1

You just need to open an InputStream based on the XML String and pass it to the SAX Parser:

try {
    String strXML ="<?xml version='1.0' encoding='UTF-8' standalone='yes'?><custDtl><name>abc</name><mobNo>9876543210</mobNo></custDtl>";
    SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
    InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
    saxParser.parse(stream, ...);
} catch (SAXException e) {
    // not valid XML String
}

Neutralism

Thank You. just had to add SAX handler part. – Configuration

Answer 2

public class XmlValidator {
    private static final SAXParserFactory SAX_PARSER_FACTORY = SAXParserFactory.newInstance();

    static {
        // Configure factory for performance and/or security, as needed
        SAX_PARSER_FACTORY.setNamespaceAware(true);
        // Additional configurations as necessary
    }

    public static boolean isXMLValid(String xmlContent) {
        try {
            SAXParser saxParser = SAX_PARSER_FACTORY.newSAXParser();
            saxParser.parse(new InputSource(new StringReader(xmlContent)), new DefaultHandler());
            return true;
        } catch (ParserConfigurationException | SAXException | IOException ex) {
            // Optionally handle or log exceptions differently based on type
            return false;
        }
    }
}

Paramedical