要解决Adobe CQ / AEM Link Checker Transformer不会剥离HTML扩展名的问题，您可以通过自定义Transformer来处理。

以下是一个示例代码，演示如何自定义Link Checker Transformer以剥离HTML扩展名：

import org.apache.sling.rewriter.Transformer;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Service;
import org.apache.sling.rewriter.TransformerFactory;
import org.apache.sling.rewriter.TransformerType;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;

import javax.xml.transform.TransformerConfigurationException;

@Component(immediate = true)
@Service
@Properties({
        @Property(name = "pipeline.type", value = "custom-link-checker")
})
public class CustomLinkCheckerTransformerFactory implements TransformerFactory {

    @Override
    public Transformer createTransformer() throws TransformerConfigurationException {
        return new CustomLinkCheckerTransformer();
    }

    @Override
    public TransformerType[] getTypes() {
        return new TransformerType[]{TransformerType.HTML};
    }
}

class CustomLinkCheckerTransformer implements Transformer {

    private ContentHandler contentHandler;
    private Locator locator;

    @Override
    public void setXMLReader(XMLReader xmlReader) {
        if (xmlReader != null) {
            xmlReader.setContentHandler(contentHandler);
            xmlReader.setEntityResolver(contentHandler);
            xmlReader.setErrorHandler(contentHandler);

            try {
                xmlReader.setProperty("http://xml.org/sax/properties/lexical-handler", contentHandler);
            } catch (SAXException e) {
                // Handle exception
            }
        }
    }

    @Override
    public void setContentHandler(ContentHandler contentHandler) {
        this.contentHandler = contentHandler;
    }

    @Override
    public void setLocator(Locator locator) {
        this.locator = locator;
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        contentHandler.characters(ch, start, length);
    }

    @Override
    public void startDocument() throws SAXException {
        contentHandler.startDocument();
    }

    @Override
    public void endDocument() throws SAXException {
        contentHandler.endDocument();
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
        if (localName.equalsIgnoreCase("a")) {
            String href = atts.getValue("href");
            if (href != null && href.endsWith(".html")) {
                // Remove .html extension
                href = href.substring(0, href.length() - 5);
                atts.setValue("href", href);
            }
        }

        contentHandler.startElement(uri, localName, qName, atts);
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        contentHandler.endElement(uri, localName, qName);
    }
}

要使用此自定义Transformer，请按照以下步骤操作：

1. 创建一个Java类，并将代码粘贴到该类中。
2. 将代码中的包名称和类名称更改为适合您的项目。
3. 将自定义Transformer类注册为OSGi组件，确保添加适当的注解和属性。
4. 将生成的jar文件部署到AEM实例的bundle目录中或通过Maven进行安装。
5. 在AEM配置中启用Link Checker，并将其配置为使用自定义Transformer。

这样，Link Checker将在检查链接时剥离HTML扩展名。