package com.se.simu.helper;
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import com.twmacinta.util.MD5;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.codec.digest.DigestUtils;
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import java.io.*;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.text.DecimalFormat;
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import java.util.List;
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/**
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* 文件帮助类
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*
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* @author WWW
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* @date 2024-07-16
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*/
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@Slf4j
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public class FileHelper {
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public final static String POINT = ".";
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public final static int I16 = 16;
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public static final double D1024 = 1024.0;
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public static final double D1050 = 1050.0;
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public final static int I1000000 = 1000000;
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public static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
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/**
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* 获取文件名
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*/
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public static String getFileName(String file) {
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int idx = file.lastIndexOf(File.separator);
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if (idx > -1) {
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return file.substring(idx + 1);
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}
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return "";
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}
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/**
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* 获取文件名称
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*/
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public static String getName(String file) {
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String fileName = getFileName(file);
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int idx = fileName.lastIndexOf(".");
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if (idx > -1) {
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return fileName.substring(0, idx);
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}
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return fileName;
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}
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/**
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* 获取文件扩展名
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*/
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public static String getExtension(File file) {
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if (file == null) {
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return null;
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}
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String fileName = file.getName().toLowerCase();
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int idx = fileName.indexOf(POINT);
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if (idx == -1) {
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return "";
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}
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return fileName.substring(idx);
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}
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/**
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* 获取文件扩展名
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*/
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public static String getExtension(String fileName) {
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if (StringHelper.isEmpty(fileName)) {
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return "";
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}
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int idx = fileName.lastIndexOf(POINT);
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if (idx == -1) {
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return "";
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}
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return fileName.substring(idx).toLowerCase();
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}
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/**
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* 获取多用途互联网邮件扩展类型
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*/
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public static String getMime(String ext) {
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switch (ext) {
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// 图片
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case ".tif":
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case ".tiff":
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return "image/tiff";
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case ".img":
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return "application/x-img";
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case ".gif":
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return "image/gif";
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case ".jpg":
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case ".jpeg":
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return "image/jpeg";
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case ".png":
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return "image/png";
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// 音/视频
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case ".mp3":
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return "audio/mp3";
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case ".mp4":
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return "video/mpeg4";
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case ".avi":
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return "video/avi";
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case ".mpg":
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case ".mpeg":
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return "video/mpg";
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case ".wav":
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return "audio/wav";
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case ".wma":
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return "audio/x-ms-wma";
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case ".swf":
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return "application/x-shockwave-flash";
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case ".wmv":
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return "video/x-ms-wmv";
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case ".rm":
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return "application/vnd.rn-realmedia";
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case ".rmvb":
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return "application/vnd.rn-realmedia-vbr";
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// 网页
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case ".js":
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return "application/x-javascript";
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case ".css":
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return "text/css";
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case ".asp":
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return "text/asp";
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case ".mht":
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return "message/rfc822";
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case ".jsp":
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case ".htm":
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case ".html":
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case ".xhtml":
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return "text/html";
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case ".xml":
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case ".svg":
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return "text/xml";
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// 文件
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case ".txt":
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return "text/plain";
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case ".dbf":
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return "application/x-dbf";
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case ".mdb":
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return "application/msaccess";
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case ".pdf":
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return "application/pdf";
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case ".ppt":
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case ".pptx":
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return "application/x-ppt";
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case ".doc":
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case ".docx":
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return "application/msword";
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case ".xls":
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case ".xlsx":
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return "application/vnd.ms-excel";
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case ".dgn":
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return "application/x-dgn";
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case ".dwg":
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return "application/x-dwg";
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case ".ext":
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return "application/x-msdownload";
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// 默认
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default:
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return "application/octet-stream";
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}
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}
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/**
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* 字节单位换算
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*/
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public static String formatByte(long byteNumber) {
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double kbNumber = byteNumber / D1024;
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if (kbNumber < D1024) {
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return new DecimalFormat("#.##KB").format(kbNumber);
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}
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double mbNumber = kbNumber / D1024;
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if (mbNumber < D1024) {
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return new DecimalFormat("#.##MB").format(mbNumber);
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}
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double gbNumber = mbNumber / D1024;
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if (gbNumber < D1024) {
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return new DecimalFormat("#.##GB").format(gbNumber);
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}
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double tbNumber = gbNumber / D1024;
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return new DecimalFormat("#.##TB").format(tbNumber);
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}
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/**
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* 获取平方米
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*/
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public static String getSquareMeter(double num) {
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if (num < I1000000) {
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return new DecimalFormat("#.##平方米").format(num);
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}
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double knum = num / I1000000;
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return new DecimalFormat("#.##平方千米").format(knum);
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}
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/**
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* byte转MB
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*/
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public static double sizeToMb(long size) {
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if (size < D1050) {
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return 0.001;
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}
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String str = String.format("%.3f", size / D1024 / D1024);
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return Double.parseDouble(str);
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}
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/**
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* 3.获取文件MD5码（JDK）
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*/
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public static String getMd5ByJdk(String filePath) throws IOException {
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FileInputStream fileStream = new FileInputStream(filePath);
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String md5 = DigestUtils.md5Hex(fileStream);
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fileStream.close();
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return md5;
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}
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/**
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* 2.获取快速 MD5 码
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*/
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public static String getFastMd5(String filePath) throws IOException {
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String hash = MD5.asHex(MD5.getHash(new File(filePath)));
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MD5 md5 = new MD5();
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md5.Update(hash, null);
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return md5.asHex();
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}
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/**
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* 删除文件夹
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*
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* @param dir 文件夹
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*/
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public static void deleteDir(String dir) {
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File file = new File(dir);
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deleteFiles(file);
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}
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/**
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* 级联删除文件
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*
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* @param file 文件
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*/
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public static void deleteFiles(File file) {
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if (null == file || !file.exists()) {
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return;
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}
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if (file.isDirectory()) {
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File[] files = file.listFiles();
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if (null != files && files.length > 0) {
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for (File f : files) {
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if (f.isDirectory()) {
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deleteFiles(f);
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} else {
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f.delete();
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}
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}
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}
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}
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file.delete();
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}
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/**
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* 获取相对路径
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*
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* @param file 文件
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* @return 相对路径
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*/
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public static String getRelativePath(String file) {
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if (StringHelper.isEmpty(file)) {
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return null;
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}
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int idx = file.lastIndexOf(File.separator);
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int start = file.lastIndexOf(File.separator, idx - 1);
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return file.substring(start + 1);
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}
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/**
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* 获取路径
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*
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* @param file 文件
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* @return 文件路径
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*/
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public static String getPath(String file) {
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if (StringHelper.isEmpty(file)) {
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return null;
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}
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int end = file.lastIndexOf(File.separator);
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return file.substring(0, end);
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}
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/**
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* 1.获取文件的MD5
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*/
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@SuppressWarnings("unused")
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public static String getFileMd5(String filePath) {
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FileInputStream fis = null;
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try {
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MessageDigest md = MessageDigest.getInstance("MD5");
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fis = new FileInputStream(new File(filePath));
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FileChannel fChannel = fis.getChannel();
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ByteBuffer buffer = ByteBuffer.allocateDirect(1024 * 1024);
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while (fChannel.read(buffer) != -1) {
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buffer.flip();
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md.update(buffer);
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buffer.compact();
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}
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byte[] b = md.digest();
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return byteToHexString(b);
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} catch (Exception ex) {
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ex.printStackTrace();
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return null;
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} finally {
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try {
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if (null != fis) {
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fis.close();
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}
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} catch (IOException ex) {
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ex.printStackTrace();
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}
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}
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}
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/**
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* 字节码转16进制
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*/
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public static String byteToHexString(byte[] tmp) {
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// 每个字节用 16 进制表示的话，使用两个字符，
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char[] str = new char[16 * 2];
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// 所以表示成 16 进制需要 32 个字符，表示转换结果中对应的字符位置
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int k = 0;
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// 从第一个字节开始，对 MD5 的每一个字节
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for (int i = 0; i < I16; i++) {
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// 转换成 16 进制字符的转换
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byte byte0 = tmp[i];
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// 取字节中高 4 位的数字转换
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str[k++] = HEX_DIGITS[byte0 >>> 4 & 0xf];
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// >>> 为逻辑右移，将符号位一起右移， 取字节中低 4 位的数字转换
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str[k++] = HEX_DIGITS[byte0 & 0xf];
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}
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// 换后的结果转换为字符串
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return new String(str);
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}
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/**
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* 获取字符串的MD5码
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*/
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public static String getStringMd5(String text) {
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StringBuilder builder = new StringBuilder();
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try {
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MessageDigest md5 = MessageDigest.getInstance("MD5");
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byte[] bytes = md5.digest(text.getBytes(StandardCharsets.UTF_8));
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for (byte aByte : bytes) {
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builder.append(Integer.toHexString((0x000000FF & aByte) | 0xFFFFFF00).substring(6));
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}
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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}
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return builder.toString();
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}
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/**
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* 根据路径获取文件
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*/
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public static void getFilesByPath(List<String> list, String path) {
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File file = new File(path);
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if (file.isDirectory()) {
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File[] files = file.listFiles();
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if (null == files) {
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return;
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}
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for (File f : files) {
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if (f.isDirectory()) {
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getFilesByPath(list, f.getPath());
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} else {
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list.add(f.getPath());
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}
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}
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} else {
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list.add(file.getPath());
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}
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}
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/**
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* 复制文件
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*
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* @param src 源文件
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* @param dest 目录文件
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*/
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public static void copyFile(File src, File dest) throws IOException {
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InputStream is = null;
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OutputStream os = null;
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try {
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is = new FileInputStream(src);
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os = new FileOutputStream(dest);
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byte[] buffer = new byte[1024];
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int length;
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while ((length = is.read(buffer)) > 0) {
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os.write(buffer, 0, length);
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}
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} finally {
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os.close();
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is.close();
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}
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}
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}
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