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.util.Enumeration; import org.apache.tools.zip.ZipEntry; import org.apache.tools.zip.ZipFile; import org.apache.tools.zip.ZipOutputStream; public class ZIPUtil { public final static int BUFFER_SIZE = 1024 * 8; /** * 打成zip压缩包 * @param dirPath 源文件夹路径 * @param toZipPath 解压后存放文件目录 */ public static void doZip(String dirPath, String toZipPath) { File dir = null; ZipOutputStream zipOut = null; String zipDirName = ""; //存储生成的zip包的路径 String parentPath = null; try { dir = new File(dirPath); zipDirName = getZipPath(dir.getName(), toZipPath); parentPath = dir.getParent(); zipOut = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipDirName))); doZipHandlerDir(dir, zipOut, parentPath); zipOut.close(); } catch (Exception e) { e.printStackTrace(); } } /** * 获得zip存储路径 * @param dirName * @param toZipPath * @return */ private static String getZipPath(String dirName, String toZipPath) { String zipDirName = ""; if (toZipPath != null && !"".equals(toZipPath.trim())) { zipDirName = toZipPath + File.separator; File newDir = new File(zipDirName); if (!newDir.exists()) { newDir.mkdirs(); } } zipDirName += dirName + ".zip"; return zipDirName; } /** * 递归完成目录下文件读取 * @param dir * @param zipOut * @throws Exception */ private static void doZipHandlerDir(File dir, ZipOutputStream zipOut, String parentPath) throws Exception { File[] files = dir.listFiles();//获得目录下的所有文件(包括目录和文件) byte[] buffer = new byte[BUFFER_SIZE];//缓存大小 if (files.length == 0) {//如果目录为空另行创建 zipOut.putNextEntry(new ZipEntry(handlerFilePath(dir.toString(),parentPath)+File.separator)); zipOut.closeEntry(); } else {//如果目录下不为空 则分别处理目录和文件 for (File file : files) { if (file.isDirectory()) {//目录情况递归遍历 doZipHandlerDir(file, zipOut, parentPath); } else {//文件情况读文件 并写入到zip包中 doZipWriteFile(file, zipOut, parentPath, buffer); } } } } /** * 向zip包中写入文件 * @param file 文件对象 * @param zipOut zip输出流 * @param parentPath 父目录路径 * @param buffer 缓存 * @throws Exception 向上抛出异常 */ private static void doZipWriteFile(File file, ZipOutputStream zipOut, String parentPath, byte[] buffer) throws Exception { FileInputStream fis = new FileInputStream(file); zipOut.putNextEntry(new ZipEntry(handlerFilePath(file.toString(), parentPath))); int length = 0;//读取字节长度 while ((length = fis.read(buffer)) > 0) { zipOut.write(buffer, 0, length); } zipOut.closeEntry(); fis.close(); } /** * 处理路径 将绝对路径处理成相对路径 否则zip包中会出现绝对路径下的每一层目录 * @param realPath 绝度路径 * @param parentPath 需要去掉的父路径 * @return 处理后的相对路径 * @throws Exception 找不到父路径时抛出异常 */ private static String handlerFilePath(String realPath, String parentPath) throws Exception { int index = -1; index = realPath.indexOf(parentPath); if (index == -1) { throw new Exception("路径错误"); } return realPath.substring(index + parentPath.length()); } /** * 解压缩文件 * @param unZipPath 要解压缩的zip文件路径 (路径+文件名) * @param toUnZipPath 解压后存放的路径 */ public static void unZip(String unZipPath, String toUnZipPath) { ZipFile zipFile = null; FileOutputStream outStream = null; InputStream inputStream = null; File file = null; try { zipFile = new ZipFile(unZipPath); for (Enumeration entities = zipFile.getEntries(); entities.hasMoreElements();) {//遍历zip包下的zip条目 ZipEntry zipEntry = (ZipEntry) entities.nextElement(); file = new File(getUnZipPath(zipEntry.getName(), toUnZipPath)); mkdirs(zipEntry, file); inputStream = zipFile.getInputStream(zipEntry);//从zip条目获得输入流 outStream = new FileOutputStream(file);//获得写入磁盘的输出流 write2Disk(outStream, inputStream); } zipFile.close(); } catch (Exception e) { e.printStackTrace(); } finally { try { if (outStream != null) { outStream.close(); } if (inputStream != null) { inputStream.close(); } } catch (IOException e) { e.printStackTrace(); } } } /** * 解压过程中创建目录 * @param zipEntry zip条目 * @param file 解压的文件夹或者文件 */ private static void mkdirs(ZipEntry zipEntry, File file) { if (zipEntry.isDirectory()) { file.mkdirs(); } else { File parent = file.getParentFile(); if (!parent.exists()) { parent.mkdirs(); } } } /** * 解压后写到磁盘 * @param outStream 输出流 * @param inputStream 读文件的输入流 * @throws IOException io异常 */ private static void write2Disk(FileOutputStream outStream, InputStream inputStream) throws IOException { int length = 0; byte[] buffer = new byte[BUFFER_SIZE]; while ((length = inputStream.read(buffer)) > 0) { outStream.write(buffer, 0, length); } outStream.flush(); outStream.close(); inputStream.close(); } /** * 获得解压后存放路径 * @param zipName zip条目名 * @param toUnZipPath 解压路径 * @return */ private static String getUnZipPath(String zipName, String toUnZipPath) { String unZipPath = "";//解压后存储路径 if (toUnZipPath != null && !"".equals(toUnZipPath)) { unZipPath = toUnZipPath + File.separator; } unZipPath += zipName; return unZipPath; } public static void main(String[] args) { unZip("C:/1.zip", "C:/123"); } }
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