java zip API實現壓縮和解壓縮zip包
阿新 • • 發佈：2017-11-21
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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;View Codeimport 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 { /** * 遞歸壓縮文件夾 *@param srcRootDir 壓縮文件夾根目錄的子路徑 * @param file 當前遞歸壓縮的文件或目錄對象 * @param zos 壓縮文件存儲對象 * @throws Exception */ private static void zip(String srcRootDir, File file, ZipOutputStream zos) throws Exception { if (file == null) {return; } //如果是文件，則直接壓縮該文件 if (file.isFile()) { int count, bufferLen = 1024; byte data[] = new byte[bufferLen]; //獲取文件相對於壓縮文件夾根目錄的子路徑 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(); } //如果是目錄，則壓縮整個目錄 else { //壓縮目錄中的文件或子目錄 File[] childFileList = file.listFiles(); for (int n=0; n<childFileList.length; n++) { childFileList[n].getAbsolutePath().indexOf(file.getAbsolutePath()); zip(srcRootDir, childFileList[n], zos); } } } /** * 對文件或文件目錄進行壓縮 * @param srcPath 要壓縮的源文件路徑。如果壓縮一個文件，則為該文件的全路徑；如果壓縮一個目錄，則為該目錄的頂層目錄路徑 * @param zipPath 壓縮文件保存的路徑。註意：zipPath不能是srcPath路徑下的子文件夾 * @param zipFileName 壓縮文件名 * @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); //判斷壓縮文件保存的路徑是否為源文件路徑的子文件夾，如果是，則拋出異常（防止無限遞歸壓縮的發生） if (srcFile.isDirectory() && zipPath.indexOf(srcPath)!=-1) { throw new ParameterException(ICommonResultCode.INVALID_PARAMETER, "zipPath must not be the child directory of srcPath."); } //判斷壓縮文件保存的路徑是否存在，如果不存在，則創建目錄 File zipDir = new File(zipPath); if (!zipDir.exists() || !zipDir.isDirectory()) { zipDir.mkdirs(); } //創建壓縮文件保存的文件對象 String zipFilePath = zipPath + File.separator + zipFileName; File zipFile = new File(zipFilePath); if (zipFile.exists()) { //檢測文件是否允許刪除，如果不允許刪除，將會拋出SecurityException SecurityManager securityManager = new SecurityManager(); securityManager.checkDelete(zipFilePath); //刪除已存在的目標文件 zipFile.delete(); } cos = new CheckedOutputStream(new FileOutputStream(zipFile), new CRC32()); zos = new ZipOutputStream(cos); //如果只是壓縮一個文件，則需要截取該文件的父目錄 String srcRootDir = srcPath; if (srcFile.isFile()) { int index = srcPath.lastIndexOf(File.separator); if (index != -1) { srcRootDir = srcPath.substring(0, index); } } //調用遞歸壓縮方法進行目錄或文件壓縮 zip(srcRootDir, srcFile, zos); zos.flush(); } catch (Exception e) { throw e; } finally { try { if (zos != null) { zos.close(); } } catch (Exception e) { e.printStackTrace(); } } } /** * 解壓縮zip包 * @param zipFilePath zip文件的全路徑 * @param unzipFilePath 解壓後的文件保存的路徑 * @param includeZipFileName 解壓後的文件保存的路徑是否包含壓縮文件的文件名。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); //如果解壓後的文件保存路徑包含壓縮文件的文件名，則追加該文件名到解壓路徑 if (includeZipFileName) { String fileName = zipFile.getName(); if (StringUtils.isNotEmpty(fileName)) { fileName = fileName.substring(0, fileName.lastIndexOf(".")); } unzipFilePath = unzipFilePath + File.separator + fileName; } //創建解壓縮文件保存的路徑 File unzipFileDir = new File(unzipFilePath); if (!unzipFileDir.exists() || !unzipFileDir.isDirectory()) { unzipFileDir.mkdirs(); } //開始解壓 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(); //循環對壓縮包裏的每一個文件進行解壓 while(entries.hasMoreElements()) { entry = entries.nextElement(); //構建壓縮包中一個文件解壓後保存的文件全路徑 entryFilePath = unzipFilePath + File.separator + entry.getName(); //構建解壓後保存的文件夾路徑 index = entryFilePath.lastIndexOf(File.separator); if (index != -1) { entryDirPath = entryFilePath.substring(0, index); } else { entryDirPath = ""; } entryDir = new File(entryDirPath); //如果文件夾路徑不存在，則創建文件夾 if (!entryDir.exists() || !entryDir.isDirectory()) { entryDir.mkdirs(); } //創建解壓文件 entryFile = new File(entryFilePath); if (entryFile.exists()) { //檢測文件是否允許刪除，如果不允許刪除，將會拋出SecurityException SecurityManager securityManager = new SecurityManager(); securityManager.checkDelete(entryFilePath); //刪除已存在的目標文件 entryFile.delete(); } //寫入文件 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(); } } }
java zip API實現壓縮和解壓縮zip包