使用AEM QueryBuilder可以获取引用的内容，以下是一个示例代码：

import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolverFactory;
import com.day.cq.search.QueryBuilder;

public class ReferenceContentFetcher {

    private ResourceResolverFactory resolverFactory;
    private QueryBuilder queryBuilder;

    public ReferenceContentFetcher(ResourceResolverFactory resolverFactory, QueryBuilder queryBuilder) {
        this.resolverFactory = resolverFactory;
        this.queryBuilder = queryBuilder;
    }

    public void fetchReferencedContent(String referencePath) {
        try (ResourceResolver resolver = resolverFactory.getServiceResourceResolver(null)) {
            String queryString = "/jcr:root" + referencePath + "//element(*, cq:PageContent)";
            Map queryMap = new HashMap<>();
            queryMap.put("path", queryString);
            queryMap.put("type", "nt:unstructured");
            queryMap.put("p.limit", "-1");

            Query query = queryBuilder.createQuery(PredicateGroup.create(queryMap), resolver.adaptTo(Session.class));
            SearchResult result = query.getResult();

            for (Hit hit : result.getHits()) {
                Resource resource = hit.getResource();
                // 处理引用的内容
                // ...
            }
        } catch (Exception e) {
            // 异常处理
        }
    }
}

上述代码中，referencePath是引用路径，例如/content/mysite/page1。首先，我们通过ResourceResolverFactory和QueryBuilder获取ResourceResolver和Query对象。然后，我们构建查询字符串，将引用路径作为根节点，并限定节点类型为cq:PageContent。接下来，我们执行查询并处理查询结果中的每个引用内容。你可以根据实际需求进行进一步的处理。请注意，上述代码仅供参考，你可能需要根据自己的需求进行适当的修改。