以 FOLDERID(32),SCENECODE(32),IMAGE(BLOB),IMAGENAME(255)为字段创建数据库表

可以使用以下 SQL 语句来创建这个数据库表：

CREATE TABLE ImageTable (
    FOLDERID VARCHAR(32),
    SCENECODE VARCHAR(32),
    IMAGE BLOB,
    IMAGENAME VARCHAR(255)
);

注意，这里使用了 VARCHAR 类型来存储 FOLDERID 和 SCENECODE，而使用了 BLOB 类型来存储 IMAGE。IMAGENAME 也使用了 VARCHAR 类型。这些数据类型的选择根据实际需求进行确定。

相关问题

java文件夹上传保存文件夹记录到数据库如何保证不被重复创建文件夹数据，给出例子

为避免重复创建文件夹数据，我们可以在数据库中为每个文件夹设置一个唯一的标识符。可以使用文件夹的名称或者路径来生成这个标识符。

在上传文件夹时，我们需要首先查询数据库中是否已经存在这个文件夹的记录。如果存在，就不需要创建新的记录了；如果不存在，我们就需要创建新的记录，并将文件夹的标识符保存到数据库中。

以下是一个示例代码，实现了文件夹上传时保存记录到数据库的功能（假设我们使用MySQL数据库）：

import java.sql.*;
import java.util.UUID;

public class FolderUploader {

    public static void uploadFolder(String folderPath) {
        // 首先查询数据库中是否已经存在这个文件夹的记录
        String folderId = queryFolderId(folderPath);
        if (folderId != null) {
            System.out.println("Folder already exists in database: " + folderPath);
            return;
        }

        // 如果不存在，就创建新的记录并保存到数据库中
        folderId = UUID.randomUUID().toString(); // 使用UUID作为文件夹的唯一标识符
        String folderName = folderPath.substring(folderPath.lastIndexOf('/') + 1);
        String insertSql = "INSERT INTO folders (id, name, path) VALUES (?, ?, ?)";
        try (Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "root", "password");
             PreparedStatement ps = conn.prepareStatement(insertSql)) {
            ps.setString(1, folderId);
            ps.setString(2, folderName);
            ps.setString(3, folderPath);
            ps.executeUpdate();
            System.out.println("Folder uploaded successfully: " + folderPath);
        } catch (SQLException e) {
            e.printStackTrace();
            System.out.println("Failed to upload folder: " + folderPath);
        }
    }

    private static String queryFolderId(String folderPath) {
        String selectSql = "SELECT id FROM folders WHERE path = ?";
        try (Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "root", "password");
             PreparedStatement ps = conn.prepareStatement(selectSql)) {
            ps.setString(1, folderPath);
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                return rs.getString("id");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        // 在这里调用 uploadFolder 方法上传文件夹
    }

}

请注意，这只是一个示例代码，实际情况下还需要考虑更多的细节和异常情况。

给下面代码添加注释：public Document breakpointUpload(@RequestPart("file") MultipartFile file, @RequestParam("chunkNumber") Integer chunkNumber, @RequestParam("totalChunks") Integer totalChunks, @RequestParam("identifier") String identifier, @RequestParam(name = "documentId",required = false) String documentId, @RequestParam(name = "folderId") String folderId, @RequestParam(name = "versionId",required = false) String versionId) { if (StringUtils.isBlank(folderId)) { throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "folderId不能为空"); } else { String fileName = file.getOriginalFilename(); fileName = fileName.substring(0, fileName.lastIndexOf(".")); if (fileName.length() > this.maxFileNameLength) { throw new BimdcException(400, "【" + fileName + "】文件长度为：" + fileName.length() + "字符，已超过" + this.maxFileNameLength + "字符长度！"); } else { try { log.info("DocumentServiceImpl breakpointUpload, upfile=[{}], chunkNumber=[{}], totalChunks=[{}], identifier=[{}], documentId=[{}], folderId=[{}], versionId=[{}]", new Object[]{file.getOriginalFilename(), chunkNumber, totalChunks, identifier, documentId, folderId, versionId}); double checkFileSize = (double)file.getSize() / 1048576.0; if (checkFileSize > this.maxbreakpointUploadFileSize) { throw new BimdcException(file.getOriginalFilename() + "文件大小不能超过" + this.maxbreakpointUploadFileSize + "M！"); } else { Map<String, Object> params = new HashMap(9); params.put("chunkNumber", chunkNumber); params.put("totalChunks", totalChunks); params.put("identifier", identifier); if (null != documentId) { params.put("documentId", documentId); } if (null != folderId) { params.put("folderId", folderId); } if (null != versionId) { params.put("versionId", versionId); } String url = this.serviceUrl + "document/v1/document/document/uploadResume"; String result = this.httpMultipartFormdata.postMultipartFile(url, params, file, "upfile"); log.info("upload result = [{}]", result); Document document = new Document(); if (result.contains("code")) { JSONObject jsonObject = JSONObject.fromObject(result); if ("0".equals(jsonObject.get("code"))) { jsonObject = JSONObject.fromObject(JSONObject.fromObject(result).get("data")); document.setDocumentId(jsonObject.getString("pathMd5")); document.setFileId(jsonObject.getString("id")); document.setVersionNo(Integer.parseInt(jsonObject.getString("updateNo"))); } } return document;

/**
* 从前端上传的文件中断点续传
* @param file 上传的文件
* @param chunkNumber 当前分片编号
* @param totalChunks 总分片数
* @param identifier 文件唯一标识符
* @param documentId 文档ID（可选）
* @param folderId 文件夹ID
* @param versionId 版本ID（可选）
* @return 返回上传成功的文档对象
*/
public Document breakpointUpload(@RequestPart("file") MultipartFile file,
@RequestParam("chunkNumber") Integer chunkNumber,
@RequestParam("totalChunks") Integer totalChunks,
@RequestParam("identifier") String identifier,
@RequestParam(name = "documentId",required = false) String documentId,
@RequestParam(name = "folderId") String folderId,
@RequestParam(name = "versionId",required = false) String versionId) {
// 检查文件夹ID是否为空
if (StringUtils.isBlank(folderId)) {
throw new BimdcException(HttpStatus.BAD_REQUEST.value(), "folderId不能为空");
} else {
String fileName = file.getOriginalFilename();
// 获取文件名（不含后缀名）
fileName = fileName.substring(0, fileName.lastIndexOf("."));
// 检查文件名长度是否超过最大长度限制
if (fileName.length() > this.maxFileNameLength) {
throw new BimdcException(400, "【" + fileName + "】文件长度为：" + fileName.length() + "字符，已超过" + this.maxFileNameLength + "字符长度！");
} else {
try {
// 记录上传日志
log.info("DocumentServiceImpl breakpointUpload, upfile=[{}], chunkNumber=[{}], totalChunks=[{}], identifier=[{}], documentId=[{}], folderId=[{}], versionId=[{}]", new Object[]{file.getOriginalFilename(), chunkNumber, totalChunks, identifier, documentId, folderId, versionId});
// 检查文件大小是否超过最大限制
double checkFileSize = (double)file.getSize() / 1048576.0;
if (checkFileSize > this.maxbreakpointUploadFileSize) {
throw new BimdcException(file.getOriginalFilename() + "文件大小不能超过" + this.maxbreakpointUploadFileSize + "M！");
} else {
// 构造上传参数
Map<String, Object> params = new HashMap(9);
params.put("chunkNumber", chunkNumber);
params.put("totalChunks", totalChunks);
params.put("identifier", identifier);
if (null != documentId) {
params.put("documentId", documentId);
}
if (null != folderId) {
params.put("folderId", folderId);
}
if (null != versionId) {
params.put("versionId", versionId);
}
// 构造上传URL
String url = this.serviceUrl + "document/v1/document/document/uploadResume";
// 调用HTTP上传工具类，上传文件
String result = this.httpMultipartFormdata.postMultipartFile(url, params, file, "upfile");
// 记录上传结果
log.info("upload result = [{}]", result);
// 解析上传结果，构造Document对象
Document document = new Document();
if (result.contains("code")) {
JSONObject jsonObject = JSONObject.fromObject(result);
if ("0".equals(jsonObject.get("code"))) {
jsonObject = JSONObject.fromObject(JSONObject.fromObject(result).get("data"));
document.setDocumentId(jsonObject.getString("pathMd5"));
document.setFileId(jsonObject.getString("id"));
document.setVersionNo(Integer.parseInt(jsonObject.getString("updateNo")));
}
}
return document;
}
}
catch (Exception e) {
// 记录错误日志
log.error("breakpointUpload error : {}", e.getMessage());
throw new BimdcException(400, "文件上传失败：" + e.getMessage());
}
}
}
}