深入理解Jackrabbit内容存储：JCR API实践指南

import javax.jcr.Repository;
import javax.jcr.Session;
import javax.jcr.SimpleCredentials;
import javax.jcr.RepositoryException;

// 假设你已经配置了Jackrabbit仓库，例如通过JNDI或直接创建
public class JcrConnection {

    public static Session getSession() throws RepositoryException {
        // 示例：通过JackrabbitStandaloneRepositoryFactory获取仓库实例
        // 实际应用中，你可能通过JNDI查找或Spring配置获取Repository
        Repository repository = new org.apache.jackrabbit.commons.JcrRepositoryFactory().getRepository();

        // 使用管理员凭据登录
        // 生产环境中应使用更安全的凭据管理方式
        return repository.login(new SimpleCredentials("admin", "admin".toCharArray()));
    }

    public static void closeSession(Session session) {
        if (session != null && session.isLive()) {
            session.logout();
        }
    }
}

import javax.jcr.Node;
import javax.jcr.RepositoryException;

public class JcrContentManager {

    public Node getOrCreateFolder(Session session, String path) throws RepositoryException {
        Node rootNode = session.getRootNode();
        Node currentNode = rootNode;
        String[] pathSegments = path.split("/");

        for (String segment : pathSegments) {
            if (segment.isEmpty()) continue;
            if (currentNode.hasNode(segment)) {
                currentNode = currentNode.getNode(segment);
            } else {
                currentNode = currentNode.addNode(segment, "nt:folder"); // 创建nt:folder类型的节点
            }
        }
        return currentNode;
    }
}

import javax.jcr.Binary;
import javax.jcr.Node;
import javax.jcr.Session;
import javax.jcr.RepositoryException;
import java.io.InputStream;
import java.util.Calendar;
import java.io.FileInputStream;
import java.io.IOException;

public class ImageUploader {

    public void uploadImage(Session session, String parentPath, String imageName, String mimeType, InputStream imageStream)
            throws RepositoryException, IOException {

        Node parentNode = new JcrContentManager().getOrCreateFolder(session, parentPath);

        // 创建nt:file节点
        Node fileNode = parentNode.addNode(imageName, "nt:file");

        // 创建jcr:content节点（nt:resource类型），用于存储实际内容
        Node resNode = fileNode.addNode("jcr:content", "nt:resource");

        // 将InputStream转换为JCR Binary类型
        Binary binary = session.getValueFactory().createBinary(imageStream);

        // 设置jcr:data属性来存储二进制数据
        resNode.setProperty("jcr:data", binary);
        // 设置jcr:mimeType属性，指明文件类型
        resNode.setProperty("jcr:mimeType", mimeType);
        // 设置jcr:lastModified属性，记录最后修改时间
        resNode.setProperty("jcr:lastModified", Calendar.getInstance());

        // 保存所有更改
        session.save();

        // 释放Binary资源
        binary.dispose(); 
        System.out.println("图片 '" + imageName + "' 已成功上传到 " + parentPath);
    }

    public static void main(String[] args) {
        Session session = null;
        InputStream imageInputStream = null;
        try {
            session = JcrConnection.getSession();
            ImageUploader uploader = new ImageUploader();

            // 示例图片文件路径和信息
            String imageFilePath = "path/to/your/image.jpg"; // 请替换为你的图片路径
            String parentFolder = "my-application/images";
            String fileName = "sample-image.jpg";
            String mimeType = "image/jpeg";

            imageInputStream = new FileInputStream(imageFilePath);
            uploader.uploadImage(session, parentFolder, fileName, mimeType, imageInputStream);

        } catch (RepositoryException | IOException e) {
            e.printStackTrace();
        } finally {
            if (imageInputStream != null) {
                try {
                    imageInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            JcrConnection.closeSession(session);
        }
    }
}