Java load local xsd file in <import namespace>

I try to load my local xsd file (import...schemaLocation="gml.xsd" but it seems nothing working because I got always same error :

org.xml.sax.SAXParseException; lineNumber: 6; columnNumber: 122; src-resolve: Cannot resolve the name 'gml:AbstractFeature' to a(n) 'element declaration' component.

config.xsd :

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:pcrs="http://cnig.gouv.fr/pcrs" xmlns:pcrs-i="http://cnig.gouv.fr/pcrs-information" targetNamespace="http://cnig.gouv.fr/pcrs" elementFormDefault="qualified" version="2.0beta2">
	<import namespace="http://cnig.gouv.fr/pcrs-information" schemaLocation="CNIG_PCRS-INFO_v2.0.xsd"/>
	<import namespace="http://www.opengis.net/gml/3.2" schemaLocation="gml.xsd"/>
	<!--XML Schema document created by ShapeChange - http://shapechange.net/-->
	<element name="AffleurantEnveloppePCRS" type="pcrs:AffleurantEnveloppePCRSType" substitutionGroup="gml:AbstractFeature">

java :

    ClassLoader classloader = Thread.currentThread().getContextClassLoader();
    InputStream xsd = classloader.getResourceAsStream("gml/config.xsd");
    InputStream gml = classloader.getResourceAsStream("gml/test.gml");

    public boolean validateXSD() {
            try {
                SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
                Schema schema = factory.newSchema(new StreamSource(xsd));
                Validator validator = schema.newValidator();
                validator.validate(new StreamSource(gml));
                return true;
            } catch (Exception error) {
                System.out.println(error);
                return false;
            }
        }

Since you're supplying a byte stream, the XML library has no idea where the file is located, so it cannot resolved relative paths.

As a fall-back, it likely resolved the relative paths relative to the current directory, but since the files are not there, they are not found.

Specify the XSD as a URI.

public boolean validateXSD() {
    ClassLoader classloader = Thread.currentThread().getContextClassLoader();
    URL xsd = classloader.getResource("gml/config.xsd");
    URL gml = classloader.getResource("gml/test.gml");
    try {
        SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = factory.newSchema(xsd); // Pass URL to XML library
        Validator validator = schema.newValidator();
        validator.validate(new StreamSource(gml.toString())); // Pass URL as a string
        return true;
    } catch (Exception error) {
        System.out.println(error);
        return false;
    }
}

Advantage: You don't have to remember to close the streams, which you seemed to have forgot.