Java HTML / XML How to - Validate XML against xsd's

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Question

We would like to know how to validate XML against xsd's.

Answer

import java.io.File;
/*  ww w. j a  va  2  s .  c  o m*/
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;

import org.w3c.dom.Document;

public class Main {
    public static void main(String[] args) throws Exception{
        SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        documentBuilderFactory.setNamespaceAware(true);
        DocumentBuilder parser = documentBuilderFactory.newDocumentBuilder();
        Document document = parser.parse(new File("NewFile.xml"));

        Schema schema = schemaFactory.newSchema(new File("NewFile.xsd"));
        Validator validator = schema.newValidator();
        validator.validate(new DOMSource(document));
    }
}

NewFile.xml:

<tns:fundamo xmlns:p="http://www.java2s.com/xsd/gen_fin"
    xmlns:tns="http://www.java2s.com/xsd/accList" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.java2s.com/xsd/accList AccountList.xsd ">
    <tns:response>
        <p:code>p:code</p:code>
        <p:description>p:description</p:description>
    </tns:response>
</tns:fundamo>

NewFile.xsd:

<xs:schema/*from www.j a  va  2s  .com*/
    version="1.0"
    elementFormDefault="qualified"
    attributeFormDefault="unqualified"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:tns="http://www.java2s.com/xsd/accList"
    targetNamespace="http://www.java2s.com/xsd/accList"
    xmlns:common="http://www.java2s.com/xsd/gen_fin">

    <xs:import namespace="http://www.java2s.com/xsd/gen_fin" schemaLocation="common.xsd" />
    <xs:element name="fundamo">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="response" type="common:response"
                    minOccurs="1" maxOccurs="1" />
                <xs:element name="transaction" type="tns:transaction"
                    minOccurs="0" maxOccurs="1" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:complexType name="transaction">
        <xs:sequence>
            <xs:element name="transactionRef" type="xs:string" />
            <xs:element name="dateTime" type="xs:string" />
            <xs:element name="userName" type="xs:string" />
        </xs:sequence>
    </xs:complexType>
</xs:schema>

common.xsd

<xs:schema/*w ww  .j  a  v  a2 s  .  com*/
    version="1.0"
    elementFormDefault="qualified"
    attributeFormDefault="unqualified"
    xmlns="http://www.java2s.com/xsd/gen_fin"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.java2s.com/xsd/gen_fin">

    <xs:complexType name="response">
        <xs:sequence>
            <xs:element name="code" type="xs:string" />
            <xs:element name="description" type="xs:string" />
        </xs:sequence>
    </xs:complexType>
</xs:schema>

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