JAVA初窥：Zip压缩工具类（一）（解决中文乱码）

在Java项目中需要对文件夹的内容进行Zip压缩，参考了网上的代码并修复了里面的一些问题，例如：中文乱码、媒体文件解压后损坏。

所使用的Jar包：ant-*.*.*.jar和log4j-*.*.*.jar，示例工程的CSDN下载地址：http://download.csdn.net/download/pengjunlee/10043076。

ZipUtil工具类源码

import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.Enumeration;import java.util.List;import org.apache.log4j.Logger;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;/*  * ZIP压缩工具类  */public class ZipUtil {private static final Logger logger = Logger.getLogger(ZipUtil.class);/** * 打包指定目录下所有文件，包括子文件夹 *  * @param sourceFolder *            要打包的文件目录 * @param targetFolder *            生成的压缩文件存放目录 * @param zipFileName *            生成的压缩文件名 * @param encoding *            压缩时采用的编码格式 * @throws IOException */public static void zipFolder(String sourceFolder, String targetFolder,String zipFileName, String encoding) {if (isEmptyStr(sourceFolder) || isEmptyStr(targetFolder)|| isEmptyStr(zipFileName)) {logger.error("invalid compress parameters...");return;}sourceFolder = formatFilePath(sourceFolder);targetFolder = formatFilePath(targetFolder);List<String> fileList = generatefileList(sourceFolder);zipfileList(fileList, sourceFolder, targetFolder, zipFileName, encoding);}/** * 打包指定的文件。要打包的文件在文件列表中指定 *  * @param fileList *            要打包的文件列表，这些文件是相对路径 * @param sourceFolder *            要打包的文件所在目录的绝对路径 * @param targetFolder *            生成的压缩文件存放的目录 * @param zipFileName *            生成的压缩文件名 * @param encoding *            压缩时采用的编码格式 * @throws IOException */public static void zipfileList(List<String> fileList, String sourceFolder,String targetFolder, String zipFileName, String encoding) {if (fileList == null || fileList.isEmpty()) {logger.error("no files to be zip. fileList is null or empty...");return;}if (isEmptyStr(targetFolder) || isEmptyStr(zipFileName)) {logger.error("targetFolder and zipFileName are unspecified...");return;}sourceFolder = formatFilePath(sourceFolder);targetFolder = formatFilePath(targetFolder);if (isEmptyStr(encoding)) {encoding = "UTF-8";}File outputDir = new File(targetFolder);if (!outputDir.exists()) {outputDir.mkdirs();}byte[] buffer = new byte[1024 * 1024];String outputFullFileName = (targetFolder + "/" + zipFileName);ZipOutputStream zos = null;try {zos = new ZipOutputStream(new FileOutputStream(outputFullFileName));zos.setEncoding(encoding);logger.info("Output to Zip : " + outputFullFileName);for (String file : fileList) {if (isEmptyStr(file)) {continue;}logger.info("File Added : " + file);ZipEntry ze = new ZipEntry(file); // 这里用的是相对路径zos.putNextEntry(ze);FileInputStream in = new FileInputStream(sourceFolder + "/" + file); // 这里是绝对路径int len;while ((len = in.read(buffer)) > 0) {zos.write(buffer, 0, len);}in.close();}zos.closeEntry();logger.info("Compress Done!!!");} catch (IOException e) {logger.error("Compress Wrong!!!");} finally {// remember close itif (null != zos) {try {zos.close();} catch (IOException e) {logger.error(e.getMessage());}}}}/** * 获取指定目录下的文件列表，包含子文件夹下的文件，忽略空文件夹 *  * @param fileFolder *            文件或目录 * @return 目录下的文件列表 */public static List<String> generatefileList(String fileFolder) {List<String> fileList = null;if (!isEmptyStr(fileFolder)) {fileFolder = formatFilePath(fileFolder);fileList = new ArrayList<String>();File node = new File(fileFolder);generateFileListHelper(fileFolder, node, fileList);}return fileList;}private static void generateFileListHelper(String sourceFolder, File node,List<String> fileList) {// add file onlyif (node.isFile()) {String absoluteFile = node.getAbsoluteFile().toString();String filepath = generateZipEntry(sourceFolder, absoluteFile);fileList.add(filepath);}if (node.isDirectory()) {String[] subNodes = node.list();for (String subNode : subNodes) {File subFile = new File(node, subNode);generateFileListHelper(sourceFolder, subFile, fileList);}}}/** * 格式化被压缩文件的路径,删除文件的sourceFolder路径 例如： d:\ziptest\tmpty.txt --> tmpty.txt * d:\ziptest\sub\t.xls --> sub\t.xls *  * @param file *            被压缩文件，这里是绝对路径 * @return 格式化后的文件路径，这里是与sourceFolder的相对路径 */private static String generateZipEntry(String sourceFolder, String file) {logger.debug("sourceFolder=" + sourceFolder);logger.debug("file=" + file);String formattedPath = file.substring(sourceFolder.length() + 1);formattedPath = formatFilePath(formattedPath);logger.debug("formattedPath=" + formattedPath);return formattedPath;}/** * 将文件路径中的分隔符"\"转换成"/",并去掉最后的分隔符（如果有） *  * @param filePath *            文件路径 * @return 格式化后的文件路径 */public static String formatFilePath(String filePath) {if (filePath != null && filePath.length() != 0) {filePath = filePath.replaceAll("\\\\", "/");}if (filePath.endsWith("/")) {filePath = filePath.substring(0, filePath.length() - 1);}return filePath;}private static boolean isEmptyStr(String str) {return str == null || str.length() == 0;}/** * 解压zip文件，支持子文件夹和中文 *  * @param zipFileFullName *            要解压的zip文件，这里是绝对路径 * @param targetFolder *            解压到指定目录。这里是绝对路径，为空则默认解压到压缩文件所在目录 * @param encoding *            解压时采用的编码格式 */@SuppressWarnings("rawtypes")public static void unzip(String zipFileFullName, String targetFolder,String encoding) {if (zipFileFullName == null || zipFileFullName.length() == 0) {return;}if (!zipFileFullName.endsWith(".zip")) {logger.error(zipFileFullName + " is not a zip file...");return;}if (isEmptyStr(encoding)) {encoding = "UTF-8";}// 将文件路径中的分隔符"\"转换成"/"zipFileFullName = zipFileFullName.replaceAll("\\\\", "/");// 获取压缩文件所在目录String zipFolder = zipFileFullName.replaceAll("/[^/]+\\.zip", "");if (targetFolder == null || targetFolder.length() == 0) {targetFolder = zipFolder;}targetFolder = targetFolder.replaceAll("\\\\", "/");File targetFolderFile = new File(targetFolder);if (!targetFolderFile.exists()) {targetFolderFile.mkdirs();}OutputStream outStream = null;InputStream inStream = null;try {ZipFile zip = new ZipFile(zipFileFullName, encoding);Enumeration zipFileEntries = zip.getEntries();while (zipFileEntries.hasMoreElements()) {ZipEntry entry = (ZipEntry) zipFileEntries.nextElement();String entryName = entry.getName();logger.debug("Extracting,entryName=" + entryName);int lastSlashPos = entryName.lastIndexOf("/");/* * 用本程序中ZipUtil.zipFolder或者ZipUtil.zipfileList生成的zip文件， * 如果有子文件夹，entry.getName()会直接得到子文件夹中的文件而略过子文件夹 * 所以这里需要先生成文件所在的各级子文件夹目录 */if (lastSlashPos != -1) {String folderStr = targetFolder + "/"+ entryName.substring(0, lastSlashPos);File folder = new File(folderStr);if (!folder.exists()) {folder.mkdirs();}}if (!entryName.endsWith("/")) {File outFile = new File(targetFolder + "/" + entryName);outStream = new BufferedOutputStream(new FileOutputStream(outFile));byte[] buffer = new byte[1024 * 1024];inStream = new BufferedInputStream(zip.getInputStream(entry));int len;while ((len = inStream.read(buffer)) > 0) {outStream.write(buffer, 0, len);}outStream.flush();}}} catch (Exception e) {logger.error("errors occur when decompressing...");e.printStackTrace();} finally {if (null != outStream) {try {outStream.close();} catch (IOException e) {logger.error(e.getMessage());}}if (null != inStream) {try {inStream.close();} catch (IOException e) {logger.error(e.getMessage());}}}}public static void main(String[] argv) {String sourceFolder = "D:\\sourceFolder";// 要打包压缩的文件夹String targetFolder = "D:\\targetFolder";String outputFileName = "test.zip";zipFolder(sourceFolder, targetFolder, outputFileName, "GB2312");String zipFileFullName = "D:\\targetFolder\\test.zip";unzip(zipFileFullName, "D:\\test", "GB2312");}}