在AEM中，安装无需注册可以通过以下代码示例实现：

import org.apache.sling.jcr.api.SlingRepository;
import org.apache.sling.commons.osgi.PropertiesUtil;
import org.osgi.framework.BundleContext;
import org.osgi.service.component.ComponentContext;
import javax.jcr.Repository;
import javax.jcr.Session;
import javax.jcr.SimpleCredentials;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;

@Component(
    label = "AEM Installation without Registration",
    description = "This component installs AEM without registration",
    immediate = true
)
public class AemInstallationComponent {
    private static final Logger LOG = LoggerFactory.getLogger(AemInstallationComponent.class);

    @Property(
        label = "Admin Username",
        description = "Username of the admin user",
        value = "admin",
        propertyPrivate = true
    )
    private static final String PROP_ADMIN_USERNAME = "admin.username";

    @Property(
        label = "Admin Password",
        description = "Password of the admin user",
        value = "admin",
        propertyPrivate = true
    )
    private static final String PROP_ADMIN_PASSWORD = "admin.password";

    private BundleContext bundleContext;
    private SlingRepository slingRepository;

    @Activate
    protected void activate(ComponentContext componentContext, Map config) {
        bundleContext = componentContext.getBundleContext();
        slingRepository = getService(SlingRepository.class);
        String adminUsername = PropertiesUtil.toString(config.get(PROP_ADMIN_USERNAME), "admin");
        String adminPassword = PropertiesUtil.toString(config.get(PROP_ADMIN_PASSWORD), "admin");

        try {
            Session adminSession = slingRepository.login(new SimpleCredentials(adminUsername, adminPassword.toCharArray()));
            // Perform AEM installation tasks here
            adminSession.save();
            adminSession.logout();
        } catch (Exception e) {
            LOG.error("Error during AEM installation", e);
        }
    }

    @Deactivate
    protected void deactivate() {
        // Clean up resources if needed
    }

    private  T getService(Class clazz) {
        ServiceReference serviceReference = bundleContext.getServiceReference(clazz);
        return bundleContext.getService(serviceReference);
    }
}

上述代码是一个示例的AEM组件，它在激活时会尝试使用指定的用户名和密码创建一个管理员会话。然后，在activate方法中的// Perform AEM installation tasks here注释下面，您可以编写执行AEM安装任务的代码。

请注意，这只是一个示例，实际的AEM安装任务将根据您的具体需求而变化。在执行实际的安装任务之前，请确保您已仔细阅读AEM的文档，并了解如何正确地安装和配置AEM。