feat(file):文件管理接口
Change-Id: I0ad3e90c49c47e2bf31a8ac2c3d14463cb65de38
diff --git a/ruoyi-admin/src/main/java/com/ruoyi/torrent/util/TorrentFileUtil.java b/ruoyi-admin/src/main/java/com/ruoyi/torrent/util/TorrentFileUtil.java
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+++ b/ruoyi-admin/src/main/java/com/ruoyi/torrent/util/TorrentFileUtil.java
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+package com.ruoyi.torrent.util;
+
+import org.springframework.web.multipart.MultipartFile;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.*;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class TorrentFileUtil {
+
+ /**
+ * 文件上传工具方法
+ *
+ * @param file 上传的文件对象
+ * @param savePath 文件保存路径
+ * @return 返回包含文件信息的Map
+ * @throws IOException 文件操作异常
+ */
+ public static Map<String, Object> uploadFile(MultipartFile file, String savePath) throws IOException {
+ if (file.isEmpty()) {
+ throw new IllegalArgumentException("上传文件不能为空");
+ }
+
+ // 确保目录存在
+ Path saveDir = Paths.get(savePath);
+ if (!Files.exists(saveDir)) {
+ Files.createDirectories(saveDir);
+ }
+
+ // 获取文件信息
+ String originalFilename = Objects.requireNonNull(file.getOriginalFilename());
+ String fileExtension = originalFilename.substring(originalFilename.lastIndexOf("."));
+ String storedFilename = System.currentTimeMillis() + "_" + UUID.randomUUID() + fileExtension;
+ long fileSize = file.getSize();
+
+ // 保存文件
+ Path targetPath = saveDir.resolve(storedFilename);
+ Files.copy(file.getInputStream(), targetPath, StandardCopyOption.REPLACE_EXISTING);
+
+ // 返回文件信息
+ Map<String, Object> fileInfo = new HashMap<>();
+ fileInfo.put("originalName", originalFilename);
+ fileInfo.put("storedName", storedFilename);
+ fileInfo.put("filePath", targetPath.toString());
+ fileInfo.put("fileSize", fileSize);
+ fileInfo.put("fileType", fileExtension.substring(1));
+ fileInfo.put("uploadTime", new Date());
+
+ return fileInfo;
+ }
+
+ /**
+ * 文件下载工具方法
+ *
+ * @param response HttpServletResponse对象
+ * @param filePath 要下载的文件路径
+ * @param fileName 下载时显示的文件名
+ * @param deleteAfterDownload 下载后是否删除原文件
+ * @throws IOException 文件操作异常
+ */
+ public static void downloadFile(HttpServletResponse response, String filePath,
+ String fileName, boolean deleteAfterDownload) throws IOException {
+ Path file = Paths.get(filePath);
+ if (!Files.exists(file)) {
+ throw new FileNotFoundException("文件不存在: " + filePath);
+ }
+
+ // 设置响应头
+ response.setContentType("application/octet-stream");
+ response.setHeader("Content-Disposition",
+ "attachment;filename=" + URLEncoder.encode(fileName, StandardCharsets.UTF_8));
+ response.setContentLength((int) Files.size(file));
+
+ // 使用NIO提高性能
+ try (InputStream is = Files.newInputStream(file);
+ OutputStream os = response.getOutputStream()) {
+ byte[] buffer = new byte[4096];
+ int bytesRead;
+ while ((bytesRead = is.read(buffer)) != -1) {
+ os.write(buffer, 0, bytesRead);
+ }
+ os.flush();
+ }
+
+ // 下载后删除原文件
+ if (deleteAfterDownload) {
+ Files.delete(file);
+ }
+ }
+
+ /**
+ * 文件下载工具方法（简化版，不删除原文件）
+ */
+ public static void downloadFile(HttpServletResponse response, String filePath, String fileName) throws IOException {
+ downloadFile(response, filePath, fileName, false);
+ }
+
+ /**
+ * 删除文件
+ *
+ * @param filePath 文件路径
+ * @return 是否删除成功
+ */
+ public static boolean deleteFile(String filePath) {
+ try {
+ return Files.deleteIfExists(Paths.get(filePath));
+ } catch (IOException e) {
+ return false;
+ }
+ }
+
+ /**
+ * 重命名文件
+ *
+ * @param oldPath 原文件路径
+ * @param newName 新文件名（不含路径）
+ * @return 新文件路径
+ * @throws IOException 文件操作异常
+ */
+ public static String renameFile(String oldPath, String newName) throws IOException {
+ Path source = Paths.get(oldPath);
+ Path target = source.resolveSibling(newName);
+ return Files.move(source, target, StandardCopyOption.REPLACE_EXISTING).toString();
+ }
+
+ /**
+ * 获取文件信息
+ *
+ * @param filePath 文件路径
+ * @return 包含文件信息的Map
+ * @throws IOException 文件操作异常
+ */
+ public static Map<String, Object> getFileInfo(String filePath) throws IOException {
+ Path path = Paths.get(filePath);
+ if (!Files.exists(path)) {
+ return null;
+ }
+
+ Map<String, Object> fileInfo = new HashMap<>();
+ fileInfo.put("fileName", path.getFileName().toString());
+ fileInfo.put("filePath", path.toString());
+ fileInfo.put("fileSize", Files.size(path));
+ fileInfo.put("lastModified", new Date(Files.getLastModifiedTime(path).toMillis()));
+ fileInfo.put("isDirectory", Files.isDirectory(path));
+
+ return fileInfo;
+ }
+
+ /**
+ * 获取目录下的文件列表
+ *
+ * @param dirPath 目录路径
+ * @return 文件信息列表
+ * @throws IOException 文件操作异常
+ */
+ public static List<Map<String, Object>> listFiles(String dirPath) throws IOException {
+ return Files.list(Paths.get(dirPath))
+ .map(path -> {
+ try {
+ Map<String, Object> fileInfo = new HashMap<>();
+ fileInfo.put("name", path.getFileName().toString());
+ fileInfo.put("path", path.toString());
+ fileInfo.put("size", Files.size(path));
+ fileInfo.put("lastModified", new Date(Files.getLastModifiedTime(path).toMillis()));
+ fileInfo.put("isDirectory", Files.isDirectory(path));
+ return fileInfo;
+ } catch (IOException e) {
+ return null;
+ }
+ })
+ .filter(Objects::nonNull)
+ .collect(Collectors.toList());
+ }
+
+ /**
+ * 复制文件
+ *
+ * @param sourcePath 源文件路径
+ * @param targetPath 目标文件路径
+ * @return 是否复制成功
+ */
+ public static boolean copyFile(String sourcePath, String targetPath) {
+ try {
+ Files.copy(Paths.get(sourcePath), Paths.get(targetPath), StandardCopyOption.REPLACE_EXISTING);
+ return true;
+ } catch (IOException e) {
+ return false;
+ }
+ }
+
+ /**
+ * 获取文件大小（格式化字符串）
+ *
+ * @param size 文件大小（字节）
+ * @return 格式化后的字符串
+ */
+ public static String formatFileSize(long size) {
+ if (size <= 0) return "0B";
+ String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};
+ int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
+ return String.format("%.2f %s", size / Math.pow(1024, digitGroups), units[digitGroups]);
+ }
+
+ /**
+ * 检查文件是否存在
+ *
+ * @param filePath 文件路径
+ * @return 是否存在
+ */
+ public static boolean fileExists(String filePath) {
+ return Files.exists(Paths.get(filePath));
+ }
+
+ /**
+ * 创建目录
+ *
+ * @param dirPath 目录路径
+ * @return 是否创建成功
+ */
+ public static boolean createDirectory(String dirPath) {
+ try {
+ Files.createDirectories(Paths.get(dirPath));
+ return true;
+ } catch (IOException e) {
+ return false;
+ }
+ }
+}
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