From ab849f796bdc17236a95ea5fe5c166fb8f24a75c Mon Sep 17 00:00:00 2001
From: sws <15810472099@163.com>
Date: 星期六, 26 十一月 2022 16:12:02 +0800
Subject: [PATCH] 1
---
src/main/java/com/lf/server/helper/FileHelper.java | 294 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 294 insertions(+), 0 deletions(-)
diff --git a/src/main/java/com/lf/server/helper/FileHelper.java b/src/main/java/com/lf/server/helper/FileHelper.java
new file mode 100644
index 0000000..85bfbd4
--- /dev/null
+++ b/src/main/java/com/lf/server/helper/FileHelper.java
@@ -0,0 +1,294 @@
+package com.lf.server.helper;
+
+import com.lf.server.entity.data.MetaFileEntity;
+import org.apache.commons.codec.digest.DigestUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.text.DecimalFormat;
+import java.util.List;
+
+/**
+ * 鏂囦欢甯姪绫�
+ * @author WWW
+ */
+public class FileHelper {
+ private final static String POINT = ".";
+
+ public static final double D1024 = 1024.0;
+
+ public static final double D1050 = 1050.0;
+
+ private final static Log log = LogFactory.getLog(FileHelper.class);
+
+ /**
+ * 鑾峰彇鏂囦欢鍚�
+ *
+ * @param file
+ * @return
+ */
+ public static String getFileName(String file) {
+ int idx = file.lastIndexOf(File.separator);
+ if (idx > -1) {
+ return file.substring(idx + 1);
+ }
+
+ return "";
+ }
+
+ /**
+ * 鑾峰彇鏂囦欢鎵╁睍鍚�
+ */
+ public static String getExtension(File file) {
+ if (file == null) {
+ return null;
+ }
+
+ String fileName = file.getName().toLowerCase();
+
+ int idx = fileName.lastIndexOf(POINT);
+ if (idx == -1) {
+ return "";
+ }
+
+ return fileName.substring(idx);
+ }
+
+ /**
+ * 鑾峰彇鏂囦欢鎵╁睍鍚�
+ */
+ public static String getExtension(String fileName) {
+ if (StringHelper.isEmpty(fileName)) {
+ return "";
+ }
+
+ int idx = fileName.lastIndexOf(POINT);
+ if (idx == -1) {
+ return "";
+ }
+
+ return fileName.substring(idx).toLowerCase();
+ }
+
+ /**
+ * 鑾峰彇澶氱敤閫斾簰鑱旂綉閭欢鎵╁睍绫诲瀷
+ *
+ * @param ext 鏂囦欢鎵╁睍鍚�
+ * @return
+ */
+ public static String getMime(String ext) {
+ switch (ext) {
+ // 鍥剧墖
+ case ".tif":
+ case ".tiff":
+ return "image/tiff";
+ case ".img":
+ return "application/x-img";
+ case ".gif":
+ return "image/gif";
+ case ".jpg":
+ case ".jpeg":
+ return "image/jpeg";
+ case ".png":
+ return "image/png";
+ // 闊�/瑙嗛
+ case ".mp3":
+ return "audio/mp3";
+ case ".mp4":
+ return "video/mpeg4";
+ case ".avi":
+ return "video/avi";
+ case ".mpg":
+ case ".mpeg":
+ return "video/mpg";
+ case ".wav":
+ return "audio/wav";
+ case ".wma":
+ return "audio/x-ms-wma";
+ case ".swf":
+ return "application/x-shockwave-flash";
+ case ".wmv":
+ return "video/x-ms-wmv";
+ case ".rm":
+ return "application/vnd.rn-realmedia";
+ case ".rmvb":
+ return "application/vnd.rn-realmedia-vbr";
+ // 缃戦〉
+ case ".js":
+ return "application/x-javascript";
+ case ".css":
+ return "text/css";
+ case ".asp":
+ return "text/asp";
+ case ".mht":
+ return "message/rfc822";
+ case ".jsp":
+ case ".htm":
+ case ".html":
+ case ".xhtml":
+ return "text/html";
+ case ".xml":
+ case ".svg":
+ return "text/xml";
+ // 鏂囦欢
+ case ".txt":
+ return "text/plain";
+ case ".dbf":
+ return "application/x-dbf";
+ case ".mdb":
+ return "application/msaccess";
+ case ".pdf":
+ return "application/pdf";
+ case ".ppt":
+ case ".pptx":
+ return "application/x-ppt";
+ case ".doc":
+ case ".docx":
+ return "application/msword";
+ case ".xls":
+ case ".xlsx":
+ return "application/vnd.ms-excel";
+ case ".dgn":
+ return "application/x-dgn";
+ case ".dwg":
+ return "application/x-dwg";
+ case ".ext":
+ return "application/x-msdownload";
+ // 榛樿
+ default:
+ return "application/octet-stream";
+ }
+ }
+
+ /**
+ * 瀛楄妭鍗曚綅鎹㈢畻
+ */
+ public static String formatByte(long byteNumber) {
+ double kbNumber = byteNumber / D1024;
+ if (kbNumber < D1024) {
+ return new DecimalFormat("#.##KB").format(kbNumber);
+ }
+ double mbNumber = kbNumber / D1024;
+ if (mbNumber < D1024) {
+ return new DecimalFormat("#.##MB").format(mbNumber);
+ }
+ double gbNumber = mbNumber / D1024;
+ if (gbNumber < D1024) {
+ return new DecimalFormat("#.##GB").format(gbNumber);
+ }
+ double tbNumber = gbNumber / D1024;
+
+ return new DecimalFormat("#.##TB").format(tbNumber);
+ }
+
+ /**
+ * byte杞琈B
+ */
+ public static double sizeToMb(long size) {
+ if (size < D1050) {
+ return 0.001;
+ }
+
+ String str = String.format("%.3f", size / D1024 / D1024);
+
+ return Double.parseDouble(str);
+ }
+
+ /**
+ * 鑾峰彇鏂囦欢 MD5 鐮�
+ */
+ public static String getFileMd5(String filePath) throws IOException {
+ FileInputStream fileStream = new FileInputStream(filePath);
+ String md5 = DigestUtils.md5Hex(fileStream);
+ fileStream.close();
+
+ return md5;
+ }
+
+ /**
+ * 鍒犻櫎鏂囦欢
+ */
+ public static void deleteFiles(List<MetaFileEntity> list) {
+ try {
+ for (MetaFileEntity mf : list) {
+ File f = new File(mf.getPath());
+ if (f.exists()) {
+ f.delete();
+ }
+ }
+ } catch (Exception ex) {
+ log.error(ex.getMessage(), ex);
+ }
+ }
+
+ /**
+ * 鍒犻櫎鏂囦欢澶�
+ *
+ * @param dir 鏂囦欢澶�
+ */
+ public static void deleteDir(String dir) {
+ File file = new File(dir);
+
+ deleteFiles(file);
+ }
+
+ /**
+ * 绾ц仈鍒犻櫎鏂囦欢
+ *
+ * @param file 鏂囦欢
+ */
+ public static void deleteFiles(File file) {
+ if (file == null || !file.exists()) {
+ return;
+ }
+
+ if (file.isDirectory()) {
+ File[] files = file.listFiles();
+ for (File f : files) {
+ if (f.isDirectory()) {
+ deleteFiles(f);
+ } else {
+ f.delete();
+ }
+ }
+ }
+
+ file.delete();
+ }
+
+ /**
+ * 鑾峰彇鐩稿璺緞
+ *
+ * @param file 鏂囦欢
+ * @return 鐩稿璺緞
+ */
+ public static String getRelativePath(String file) {
+ if (StringHelper.isEmpty(file)) {
+ return null;
+ }
+
+ int idx = file.lastIndexOf(File.separator);
+ int start = file.lastIndexOf(File.separator, idx - 1);
+
+ return file.substring(start + 1);
+ }
+
+ /**
+ * 鑾峰彇璺緞
+ *
+ * @param file 鏂囦欢
+ * @return 鏂囦欢璺緞
+ */
+ public static String getPath(String file) {
+ if (StringHelper.isEmpty(file)) {
+ return null;
+ }
+
+ int end = file.lastIndexOf(File.separator);
+
+ return file.substring(0, end);
+ }
+}
--
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