标签:
package com.cwqi.demo; /** *@author Cwqi *2015-8-26上午9:59:12 */ 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.Enumeration; import org.apache.tools.ant.Project; import org.apache.tools.ant.taskdefs.Zip; import org.apache.tools.ant.types.FileSet; import org.apache.tools.zip.ZipEntry; import org.apache.tools.zip.ZipFile; import org.apache.tools.zip.ZipOutputStream; public class ZipDemo { /** * 解压 * @param zipFilePath:压缩文件路径 */ public static void unzip(String zipFilePath) { unzipFile(zipFilePath, null); } public static File buildFile(String fileName, boolean isDirectory) { File target = new File(fileName); if (isDirectory) { target.mkdirs(); } else { if (!target.getParentFile().exists()) { target.getParentFile().mkdirs(); } } return target; } /** * 解压 * @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 */ public static void unzipFile(String zipFilePath, String targetPath) { 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; } @SuppressWarnings("unchecked") Enumeration<ZipEntry> entryEnum = zipFile.getEntries(); if (null != entryEnum) { ZipEntry zipEntry = null; while (entryEnum.hasMoreElements()) { zipEntry = entryEnum.nextElement(); if (zipEntry.isDirectory()) { new File(directoryPath + File.separator + zipEntry.getName()).mkdirs(); continue; } if (zipEntry.getSize() > 0) { // 文件 File targetFile = ZipDemo.buildFile(directoryPath + File.separator + zipEntry.getName(), false); os = new BufferedOutputStream(new FileOutputStream( targetFile)); is = zipFile.getInputStream(zipEntry); byte[] buffer = new byte[4096]; int readLen = 0; while ((readLen = is.read(buffer, 0, 4096)) >= 0) { os.write(buffer, 0, readLen); } os.flush(); os.close(); } else { // 空目录 ZipDemo.buildFile(directoryPath + File.separator + zipEntry.getName(), true); } } } } catch (IOException ex) { ex.printStackTrace(); } finally { if (null != zipFile) { zipFile = null; } if (null != is) { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } if (null != os) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } } } static final int BUFFER = 2048; /** * 压缩 * @param sourceFile 为要压缩的文件或文件目录 * @param targetFile 为要生成zip文件的路径和文件名,如:"D:\\downloads.zip" */ public static void zipFiles(String sourceDir, String targetFile) { File sourceFile = new File(sourceDir); File zFile = new File(targetFile); ZipOutputStream zos = null; try { OutputStream os; os = new FileOutputStream(zFile); BufferedOutputStream bos = new BufferedOutputStream(os); zos = new ZipOutputStream(bos); String basePath = null; if (sourceFile.isDirectory()) { basePath = sourceFile.getPath(); } else { basePath = sourceFile.getParent(); } zipFile(sourceFile, basePath, zos); } catch (IOException e) { e.printStackTrace(); } finally { if (zos != null) { try { zos.close(); } catch (IOException e) { e.printStackTrace(); } } } } private static void zipFile(File sourceFile, String basePath, ZipOutputStream zos) throws IOException { File[] files = null; if (sourceFile.isDirectory()) { files = sourceFile.listFiles(); } else { files = new File[] { sourceFile }; } InputStream is = null; BufferedInputStream bis = null; String pathName; byte[] buf = new byte[BUFFER]; int length = 0; try { for (File file : files) { if (file.isDirectory()) { pathName = file.getPath().substring(basePath.length() + 1) + "/"; zos.putNextEntry(new ZipEntry(pathName)); zipFile(file, basePath, zos); } else { pathName = file.getPath().substring(basePath.length() + 1); is = new FileInputStream(file); bis = new BufferedInputStream(is); zos.putNextEntry(new ZipEntry(pathName)); while ((length = bis.read(buf)) != -1) { zos.write(buf, 0, length); } } } } finally { if (bis != null) { bis.close(); } if (is != null) { is.close(); } } } /** * 使用ant压缩 * @param srcPathName * @param destPathName */ public static void zipByAnt(String srcPathName,String destPathName) { File srcdir = new File(srcPathName); if (!srcdir.exists()){ throw new RuntimeException(srcPathName + "no exist!"); } Project project = new Project(); Zip zip = new Zip(); zip.setProject(project); File zipFile = new File(destPathName); zip.setDestFile(zipFile); FileSet fileSet = new FileSet(); fileSet.setProject(project); fileSet.setDir(srcdir); // fileSet.setIncludes("**/*.java"); // fileSet.setExcludes(*.txt); zip.addFileset(fileSet); zip.execute(); } /** * 测试 * @param args */ public static void main(String[] args) { unzipFile("D:\\Downloads.zip", "D:\\Downloads"); //zipFiles("D:\\Downloads", "D:\\Downloads.zip"); //zipByAnt("D:\\Downloads", "D:\\Downloads.zip"); } }
标签:
原文地址:http://my.oschina.net/u/1861837/blog/497284