java zip API实现压缩和解压缩zip包
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package zip; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.Enumeration; import java.util.zip.CRC32; import java.util.zip.CheckedOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; import java.util.zip.ZipOutputStream; import org.apache.commons.lang3.StringUtils; public class ZipUtil { /** * 递归压缩文件夹 * @param srcRootDir 压缩文件夹根目录的子路径 * @param file 当前递归压缩的文件或目录对象 * @param zos 压缩文件存储对象 * @throws Exception */ private static void zip(String srcRootDir, File file, ZipOutputStream zos) throws Exception { if (file == null) { return; } //如果是文件,则直接压缩该文件 if (file.isFile()) { int count, bufferLen = 1024; byte data[] = new byte[bufferLen]; //获取文件相对于压缩文件夹根目录的子路径 String subPath = file.getAbsolutePath(); int index = subPath.indexOf(srcRootDir); if (index != -1) { subPath = subPath.substring(srcRootDir.length() + File.separator.length()); } ZipEntry entry = new ZipEntry(subPath); zos.putNextEntry(entry); BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file)); while ((count = bis.read(data, 0, bufferLen)) != -1) { zos.write(data, 0, count); } bis.close(); zos.closeEntry(); } //如果是目录,则压缩整个目录 else { //压缩目录中的文件或子目录 File[] childFileList = file.listFiles(); for (int n=0; n<childFileList.length; n++) { childFileList[n].getAbsolutePath().indexOf(file.getAbsolutePath()); zip(srcRootDir, childFileList[n], zos); } } } /** * 对文件或文件目录进行压缩 * @param srcPath 要压缩的源文件路径。如果压缩一个文件,则为该文件的全路径;如果压缩一个目录,则为该目录的顶层目录路径 * @param zipPath 压缩文件保存的路径。注意:zipPath不能是srcPath路径下的子文件夹 * @param zipFileName 压缩文件名 * @throws Exception */ public static void zip(String srcPath, String zipPath, String zipFileName) throws Exception { if (StringUtils.isEmpty(srcPath) || StringUtils.isEmpty(zipPath) || StringUtils.isEmpty(zipFileName)) { throw new ParameterException(ICommonResultCode.PARAMETER_IS_NULL); } CheckedOutputStream cos = null; ZipOutputStream zos = null; try { File srcFile = new File(srcPath); //判断压缩文件保存的路径是否为源文件路径的子文件夹,如果是,则抛出异常(防止无限递归压缩的发生) if (srcFile.isDirectory() && zipPath.indexOf(srcPath)!=-1) { throw new ParameterException(ICommonResultCode.INVALID_PARAMETER, "zipPath must not be the child directory of srcPath."); } //判断压缩文件保存的路径是否存在,如果不存在,则创建目录 File zipDir = new File(zipPath); if (!zipDir.exists() || !zipDir.isDirectory()) { zipDir.mkdirs(); } //创建压缩文件保存的文件对象 String zipFilePath = zipPath + File.separator + zipFileName; File zipFile = new File(zipFilePath); if (zipFile.exists()) { //检测文件是否允许删除,如果不允许删除,将会抛出SecurityException SecurityManager securityManager = new SecurityManager(); securityManager.checkDelete(zipFilePath); //删除已存在的目标文件 zipFile.delete(); } cos = new CheckedOutputStream(new FileOutputStream(zipFile), new CRC32()); zos = new ZipOutputStream(cos); //如果只是压缩一个文件,则需要截取该文件的父目录 String srcRootDir = srcPath; if (srcFile.isFile()) { int index = srcPath.lastIndexOf(File.separator); if (index != -1) { srcRootDir = srcPath.substring(0, index); } } //调用递归压缩方法进行目录或文件压缩 zip(srcRootDir, srcFile, zos); zos.flush(); } catch (Exception e) { throw e; } finally { try { if (zos != null) { zos.close(); } } catch (Exception e) { e.printStackTrace(); } } } /** * 解压缩zip包 * @param zipFilePath zip文件的全路径 * @param unzipFilePath 解压后的文件保存的路径 * @param includeZipFileName 解压后的文件保存的路径是否包含压缩文件的文件名。true-包含;false-不包含 */ @SuppressWarnings("unchecked") public static void unzip(String zipFilePath, String unzipFilePath, boolean includeZipFileName) throws Exception { if (StringUtils.isEmpty(zipFilePath) || StringUtils.isEmpty(unzipFilePath)) { throw new ParameterException(ICommonResultCode.PARAMETER_IS_NULL); } File zipFile = new File(zipFilePath); //如果解压后的文件保存路径包含压缩文件的文件名,则追加该文件名到解压路径 if (includeZipFileName) { String fileName = zipFile.getName(); if (StringUtils.isNotEmpty(fileName)) { fileName = fileName.substring(0, fileName.lastIndexOf(".")); } unzipFilePath = unzipFilePath + File.separator + fileName; } //创建解压缩文件保存的路径 File unzipFileDir = new File(unzipFilePath); if (!unzipFileDir.exists() || !unzipFileDir.isDirectory()) { unzipFileDir.mkdirs(); } //开始解压 ZipEntry entry = null; String entryFilePath = null, entryDirPath = null; File entryFile = null, entryDir = null; int index = 0, count = 0, bufferSize = 1024; byte[] buffer = new byte[bufferSize]; BufferedInputStream bis = null; BufferedOutputStream bos = null; ZipFile zip = new ZipFile(zipFile); Enumeration<ZipEntry> entries = (Enumeration<ZipEntry>)zip.entries(); //循环对压缩包里的每一个文件进行解压 while(entries.hasMoreElements()) { entry = entries.nextElement(); //构建压缩包中一个文件解压后保存的文件全路径 entryFilePath = unzipFilePath + File.separator + entry.getName(); //构建解压后保存的文件夹路径 index = entryFilePath.lastIndexOf(File.separator); if (index != -1) { entryDirPath = entryFilePath.substring(0, index); } else { entryDirPath = ""; } entryDir = new File(entryDirPath); //如果文件夹路径不存在,则创建文件夹 if (!entryDir.exists() || !entryDir.isDirectory()) { entryDir.mkdirs(); } //创建解压文件 entryFile = new File(entryFilePath); if (entryFile.exists()) { //检测文件是否允许删除,如果不允许删除,将会抛出SecurityException SecurityManager securityManager = new SecurityManager(); securityManager.checkDelete(entryFilePath); //删除已存在的目标文件 entryFile.delete(); } //写入文件 bos = new BufferedOutputStream(new FileOutputStream(entryFile)); bis = new BufferedInputStream(zip.getInputStream(entry)); while ((count = bis.read(buffer, 0, bufferSize)) != -1) { bos.write(buffer, 0, count); } bos.flush(); bos.close(); } } public static void main(String[] args) { String zipPath = "d:\\ziptest\\zipPath"; String dir = "d:\\ziptest\\rawfiles"; String zipFileName = "test.zip"; try { zip(dir, zipPath, zipFileName); } catch (Exception e) { e.printStackTrace(); } String zipFilePath = "D:\\ziptest\\zipPath\\test.zip"; String unzipFilePath = "D:\\ziptest\\zipPath"; try { unzip(zipFilePath, unzipFilePath, true); } catch (Exception e) { e.printStackTrace(); } } }