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标题:
Java文件操作工具类
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作者:
qiaogege
时间:
2009-2-12 09:00
标题:
Java文件操作工具类
此类包含利用JAVA进行文件的压缩，解压，删除，拷贝操作。部分代码总结了网上的代码，并修正了很多BUG,例如压缩中文问题，压缩文件中多余空文件问题。 注意：此类中用到的压缩类ZipEntry等都来自于org.apache.tools包而非java.util。此包在ant.jar中有。 /* * Version information * * Date:2008-6-26 * * Copyright (C) 2008 Chris.Tu */ package test; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.Enumeration; import org.apache.tools.zip.ZipEntry; import org.apache.tools.zip.ZipFile; import org.apache.tools.zip.ZipOutputStream; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * java文件操作工具类 * @author Chris * @version 2008-6-26 */ public class FileUtil { protected static Logger log = LoggerFactory.getLogger(FileUtil.class); /** * 压缩文件 * @param inputFileName 要压缩的文件或文件夹路径，例如：c:\\a.txt,c:\\a\ * @param outputFileName 输出zip文件的路径，例如：c:\\a.zip */ public static void zip(String inputFileName, String outputFileName) throws Exception { ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outputFileName)); zip(out, new File(inputFileName), ""); log.debug("压缩完成！"); out.closeEntry(); out.close(); }
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/** * 压缩文件 * @param out org.apache.tools.zip.ZipOutputStream * @param file 待压缩的文件 * @param base 压缩的根目录 */ private static void zip(ZipOutputStream out, File file, String base) throws Exception { if (file.isDirectory()) { File[] fl = file.listFiles(); base = base.length() == 0 ? "" : base File.separator; for (int i = 0; i < fl.length; i ) { zip(out, fl
, base fl
.getName()); } } else { out.putNextEntry(new ZipEntry(base)); log.debug("添加压缩文件：" base); FileInputStream in = new FileInputStream(file); int b; while ((b = in.read()) != -1) { out.write(b); } in.close(); } } /** * 解压zip文件 * @param zipFileName 待解压的zip文件路径，例如：c:\\a.zip * @param outputDirectory 解压目标文件夹,例如：c:\\a\ */ public static void unZip(String zipFileName, String outputDirectory) throws Exception { ZipFile zipFile = new ZipFile(zipFileName); try { Enumeration<?> e = zipFile.getEntries(); ZipEntry zipEntry = null; createDirectory(outputDirectory, ""); while (e.hasMoreElements()) { zipEntry = (ZipEntry) e.nextElement(); log.debug("解压：" zipEntry.getName()); if (zipEntry.isDirectory()) { String name = zipEntry.getName(); name = name.substring(0, name.length() - 1); File f = new File(outputDirectory File.separator name); f.mkdir(); log.debug("创建目录：" outputDirectory File.separator name); } else { String fileName = zipEntry.getName(); fileName = fileName.replace('\\', '/'); if (fileName.indexOf("/") != -1) { createDirectory(outputDirectory, fileName.substring(0, fileName.lastIndexOf("/"))); fileName = fileName.substring(fileName.lastIndexOf("/") 1, fileName.length()); } File f = new File(outputDirectory File.separator zipEntry.getName()); f.createNewFile(); InputStream in = zipFile.getInputStream(zipEntry); FileOutputStream out = new FileOutputStream(f); byte[] by = new byte[1024]; int c; while ((c = in.read(by)) != -1) { out.write(by, 0, c); } in.close(); out.close(); } } } catch (Exception ex) { System.out.println(ex.getMessage()); } finally { zipFile.close(); log.debug("解压完成！"); } }
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private static void createDirectory(String directory, String subDirectory) { String dir[]; File fl = new File(directory); try { if (subDirectory == "" && fl.exists() != true) { fl.mkdir(); } else if (subDirectory != "") { dir = subDirectory.replace('\\', '/').split("/"); for (int i = 0; i < dir.length; i ) { File subFile = new File(directory File.separator dir
); if (subFile.exists() == false) subFile.mkdir(); directory = File.separator dir
; } } } catch (Exception ex) { System.out.println(ex.getMessage()); } } /** * 拷贝文件夹中的所有文件到另外一个文件夹 * @param srcDirector 源文件夹 * @param desDirector 目标文件夹 */ public static void copyFileWithDirector(String srcDirector, String desDirector) throws IOException { (new File(desDirector)).mkdirs(); File[] file = (new File(srcDirector)).listFiles(); for (int i = 0; i < file.length; i ) { if (file
.isFile()) { log.debug("拷贝：" file
.getAbsolutePath() "-->" desDirector "/" file
.getName()); FileInputStream input = new FileInputStream(file
); FileOutputStream output = new FileOutputStream(desDirector "/" file
.getName()); byte[] b = new byte[1024 * 5]; int len; while ((len = input.read(b)) != -1) { output.write(b, 0, len); } output.flush(); output.close(); input.close(); } if (file
.isDirectory()) { log.debug("拷贝：" file
.getAbsolutePath() "-->" desDirector "/" file
.getName()); copyFileWithDirector(srcDirector "/" file
.getName(), desDirector "/" file
.getName()); } } } /** * 删除文件夹 * @param folderPath folderPath 文件夹完整绝对路径 */ public static void delFolder(String folderPath) throws Exception { //删除完里面所有内容 delAllFile(folderPath); String filePath = folderPath; filePath = filePath.toString(); File myFilePath = new File(filePath); //删除空文件夹 myFilePath.delete(); } /** * 删除指定文件夹下所有文件 * @param path 文件夹完整绝对路径 */ public static boolean delAllFile(String path) throws Exception { boolean flag = false; File file = new File(path); if (!file.exists()) { return flag; }
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if (!file.isDirectory()) { return flag; } String[] tempList = file.list(); File temp = null; for (int i = 0; i < tempList.length; i ) { if (path.endsWith(File.separator)) { temp = new File(path tempList
); } else { temp = new File(path File.separator tempList
); } if (temp.isFile()) { temp.delete(); } if (temp.isDirectory()) { //先删除文件夹里面的文件 delAllFile(path "/" tempList
); //再删除空文件夹 delFolder(path "/" tempList
); flag = true; } } return flag; } }
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