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Both, Java and XML are spread widely and used intensively.This post sheds some light onto the possibilities on validating XML files with the JAVA API.W3C_XML_SCHEMA_NS_URI); // load a WXS schema, represented by a Schema instance Source schema File = new Stream Source(new File("my Schema.xsd")); Schema schema = Schema(schema File); // create a Validator instance, which can be used to validate an instance document Validator validator = Validator(); // validate the DOM tree try catch (SAXException e) on a parser factory.The former technique will cause parsers to use the new validation API; the latter will cause parsers to use their own internal validation facilities.This is the reason why (most of the) XML parser implementations do not support XML Namespaces by default, to handle the validation of XML documents with namespaces correctly it is therefore necessary to configure the underlying parsers to provide support for XML Namespaces.

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Next, it is possible to validate the XML file against a XML schema.Or you can set your own via set Resource Resolver, ex: Source xml File = new Stream Source(xml File Location); Schema Factory schema Factory = Schema Factory Instance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = schema Schema(); Validator validator = Validator(); Resource Resolver(new LSResource Resolver() ); validator.validate(xml File); // parse an XML document into a DOM tree Document Builder parser = Document Builder Instance()Document Builder(); Document document = parser.parse(new File("instance.xml")); // create a Schema Factory capable of understanding WXS schemas Schema Factory factory = Schema Instance(XMLConstants.This article shows five ways of how to configure different Java APIs (including DOM, SAX, dom4j and XOM) using JAXP 1.3 for checking and validating XML with DTD and Schema(s).To report errors, it is necessary to provide an Error Handler to the underlying implementation.This might depends on the library you use but googling around with "how to validate xml file in java" gave me these results where you might find your answer: first interesting result second interesting result Validator v = Language(Languages.// parse an XML document into a DOM tree Document Builder parser = Document Builder Instance()Document Builder(); Document document = parser.parse(new File("instance.xml")); // create a Schema Factory capable of understanding WXS schemas Schema Factory factory = Schema Instance(XMLConstants.As quite some XML files do use multiple XML Schemas, the code above will always fail. SAXException; public class XMLValidation Employee validates against Employee.xsd? true Exception: cvc-elt.1: Cannot find the declaration of element ' Employee'. Source xml File = new Stream Source(new File("web.xml")); Schema Factory schema Factory = Schema Factory Instance(XMLConstants. URL schema File = new URL(" // webapp example xsd: // URL schema File = new URL(" // local file example: // File schema File = new File("/location/to/localfile.xsd"); // etc.

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  1. Processor in Java DSL. Validate the specified xml against the schema. * @param schema The resource schema for validation. * @param xml The XML to validate.

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