zip压缩
import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Enumeration;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;public class ZipUtils { /** * 压缩 * * @param zipFileName * 压缩产生的zip包文件名--带路径,如果为null或空则默认按文件名生产压缩文件名 //压缩的目标目录及压缩名 * @param relativePath * 相对路径，默认为空 * @param directory * 文件或目录的绝对路径 //压缩文件目录 * @throws FileNotFoundException * @throws IOException * @author yayagepei * @date 2008-8-26 */public static void zip(String zipFileName, String relativePath, String directory) throws FileNotFoundException, IOException { String fileName = zipFileName; if (fileName == null || fileName.trim().equals("")) { File temp = new File(directory); if (temp.isDirectory()) { fileName = directory + ".zip"; } else { if (directory.indexOf(".") > 0) { fileName = directory.substring(0, directory .lastIndexOf(".")) + ".zip"; } else { fileName = directory + ".zip"; } } } ZipOutputStream zos = new ZipOutputStream( new FileOutputStream(fileName)); try { zip(zos, relativePath, directory); } catch (IOException ex) { throw ex; } finally { if (null != zos) { zos.close(); } }}/** * 压缩 * * @param zos * 压缩输出流 * @param relativePath * 相对路径 * @param absolutPath * 文件或文件夹绝对路径 * @throws IOException * @author yayagepei * @date 2008-8-26 */private static void zip(ZipOutputStream zos, String relativePath, String absolutPath) throws IOException { File file = new File(absolutPath); if (file.isDirectory()) { File[] files = file.listFiles(); for (int i = 0; i < files.length; i++) { File tempFile = files; if (tempFile.isDirectory()) { String newRelativePath = relativePath + tempFile.getName() + File.separator; createZipNode(zos, newRelativePath); zip(zos, newRelativePath, tempFile.getPath()); } else { zipFile(zos, tempFile, relativePath); } } } else { zipFile(zos, file, relativePath); }}/** * 压缩文件 * * @param zos * 压缩输出流 * @param file * 文件对象 * @param relativePath * 相对路径 * @throws IOException * @author yayagepei * @date 2008-8-26 */private static void zipFile(ZipOutputStream zos, File file, String relativePath) throws IOException { ZipEntry entry = new ZipEntry(relativePath + file.getName()); zos.putNextEntry(entry); InputStream is = null; try { is = new FileInputStream(file); int BUFFERSIZE = 2 << 10; int length = 0; byte[] buffer = new byte; while ((length = is.read(buffer, 0, BUFFERSIZE)) >= 0) { zos.write(buffer, 0, length); } zos.flush(); zos.closeEntry(); } catch (IOException ex) { throw ex; } finally { if (null != is) { is.close(); } }}/** * 创建目录 * * @param zos * zip输出流 * @param relativePath * 相对路径 * @throws IOException * @author yayagepei * @date 2008-8-26 */private static void createZipNode(ZipOutputStream zos, String relativePath) throws IOException { ZipEntry zipEntry = new ZipEntry(relativePath); zos.putNextEntry(zipEntry); zos.closeEntry();}/** * 解压缩zip包 * * @param zipFilePath * zip文件路径 * @param targetPath * 解压缩到的位置，如果为null或空字符串则默认解压缩到跟zip包同目录跟zip包同名的文件夹下 * @throws IOException * @author yayagepei * @date 2008-9-28 */ @SuppressWarnings("unchecked")public static void unzip(String zipFilePath, String targetPath) throws IOException { OutputStream os = null; InputStream is = null; ZipFile zipFile = null; try { zipFile = new ZipFile(zipFilePath); String directoryPath = ""; if (null == targetPath || "".equals(targetPath)) { directoryPath = zipFilePath.substring(0, zipFilePath .lastIndexOf(".")); } else { directoryPath = targetPath; } Enumeration entryEnum = zipFile.getEntries(); if (null != entryEnum) { ZipEntry zipEntry = null; while (entryEnum.hasMoreElements()) { zipEntry = (ZipEntry) entryEnum.nextElement(); if (zipEntry.isDirectory()) { directoryPath = directoryPath + File.separator + zipEntry.getName(); System.out.println(directoryPath); continue; } if (zipEntry.getSize() > 0) { // 文件 File targetFile = FileUtils.buildFile(directoryPath + File.separator + zipEntry.getName(), false); os = new BufferedOutputStream(new FileOutputStream( targetFile)); is = zipFile.getInputStream(zipEntry); byte[] buffer = new byte; int readLen = 0; while ((readLen = is.read(buffer, 0, 4096)) >= 0) { os.write(buffer, 0, readLen); } os.flush(); os.close(); } else { // 空目录 FileUtils.buildFile(directoryPath + File.separator + zipEntry.getName(), true); } } } } catch (IOException ex) { throw ex; } finally { if(null != zipFile){ zipFile = null; } if (null != is) { is.close(); } if (null != os) { os.close(); } }}public static void main(String[] args) throws FileNotFoundException, IOException {ZipUtils.zip("F:/zip/123.zip",null,"F:/img" );}}
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