以下是一个使用 Alfresco Repo Side 处理文档上传的示例代码：

import org.alfresco.model.ContentModel;
import org.alfresco.repo.content.MimetypeMap;
import org.alfresco.repo.content.filestore.FileContentStore;
import org.alfresco.repo.model.Repository;
import org.alfresco.repo.node.NodeServicePolicies;
import org.alfresco.repo.node.NodeServicePolicies.OnCreateNodePolicy;
import org.alfresco.repo.policy.JavaBehaviour;
import org.alfresco.repo.transaction.RetryingTransactionHelper;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.repository.ContentWriter;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.namespace.QName;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class DocumentUploadHandler implements OnCreateNodePolicy {

    private static final Log logger = LogFactory.getLog(DocumentUploadHandler.class);

    private Repository repositoryHelper;
    private ServiceRegistry serviceRegistry;

    public void setRepositoryHelper(Repository repositoryHelper) {
        this.repositoryHelper = repositoryHelper;
    }

    public void setServiceRegistry(ServiceRegistry serviceRegistry) {
        this.serviceRegistry = serviceRegistry;
    }

    public void init() {
        // Register the behaviour
        this.repositoryHelper.registerPolicy(NodeServicePolicies.OnCreateNodePolicy.QNAME, this);
    }

    @Override
    public void onCreateNode(ChildAssociationRef childAssocRef) {
        NodeRef nodeRef = childAssocRef.getChildRef();
        NodeService nodeService = serviceRegistry.getNodeService();

        if (nodeService.exists(nodeRef) && nodeService.getType(nodeRef).equals(ContentModel.TYPE_CONTENT)) {
            RetryingTransactionHelper transactionHelper = repositoryHelper.getTransactionService().getRetryingTransactionHelper();
            RetryingTransactionHelper.RetryingTransactionCallback