1.说明
zip的文件压缩和解压在文件的存放用的还是比较多的。这里写了一个zip的工具类通过Apache的compress依赖实现。方便移植。
2.依赖
<!-- 压缩 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-compress</artifactId> <version>1.14</version> </dependency>
3.工具类实现
package net.xqlee.project.utils.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.compress.archivers.zip.Zip64Mode; import org.apache.commons.compress.archivers.zip.ZipArchiveEntry; import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream; import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream; import org.apache.commons.compress.utils.IOUtils; import org.apache.commons.lang.StringUtils; import net.xqlee.project.utils.exception.UtilException; /** * zip压缩算法工具类 * * @author xq * @JDK 1.7 */ public class ZipCompressUtils { private ZipCompressUtils() { // 禁止构造 } /** 缓冲大小 **/ public static final int BUFFER_SIZE = 1024; /** 系统默认字符集 **/ public static final String SYSTEM_ENCODING = System.getProperty("file.encoding"); /** * 解压zip文件,默认操作系统字符集编码 * * @param zipFile * @param destDir * @return * @throws UtilException */ public static List<String> unZip(final File zipFile, final String targetPath) throws UtilException { try { return unZip(new FileInputStream(zipFile), targetPath, SYSTEM_ENCODING); } catch (FileNotFoundException e) { throw new UtilException(e); } } /** * 指定zip字符集解压文件 * * @param zipFile * @param targetPath * @param encoding * @return * @throws UtilException */ public static List<String> unZip(final File zipFile, final String targetPath, String encoding) throws UtilException { try { return unZip(new FileInputStream(zipFile), targetPath, encoding); } catch (FileNotFoundException e) { throw new UtilException(e); } } /** * 解压zip文件流 * * @param zipFileInputStream * @param targetPath * @return * @throws UtilException */ public static List<String> unZip(final InputStream zipFileInputStream, final String targetPath) throws UtilException { return unZip(zipFileInputStream, targetPath, SYSTEM_ENCODING); } /** * 解压 zip 文件 * * @param zipFileInputStream * zip 压缩文件流 * @param destDir * zip 压缩文件解压后保存的目录 * @return 返回 zip 压缩文件里的文件名的 list * @throws UtilException * 工具类处理的异常 */ public static List<String> unZip(final InputStream zipFileInputStream, final String destDir, final String encoding) throws UtilException { // 如果 destDir 为 null, 空字符串, 或者全是空格, 则解压到压缩文件所在目录 String targetDir = ""; if (StringUtils.isBlank(destDir)) { throw new UtilException("Target Path Can't Be Empty!"); } else { targetDir = destDir.endsWith(File.separator) ? destDir : destDir + File.separator; } // 字符集处理 String fileEncoding = encoding; if (StringUtils.isBlank(encoding)) { fileEncoding = SYSTEM_ENCODING; } List<String> fileNames = new ArrayList<>(); try (ZipArchiveInputStream is = new ZipArchiveInputStream( new BufferedInputStream(zipFileInputStream, BUFFER_SIZE), fileEncoding);) { ZipArchiveEntry entry = null; while ((entry = is.getNextZipEntry()) != null) { String fileName = entry.getName(); fileNames.add(fileName); if (entry.isDirectory()) { File directory = new File(targetDir, fileName); directory.mkdirs(); } else { try (OutputStream os = new BufferedOutputStream(new FileOutputStream(new File(targetDir, fileName)), BUFFER_SIZE);) { IOUtils.copy(is, os); } } } } catch (Exception e) { throw new UtilException(e); } return fileNames; } /** * zip打包 * * @param files * @param zipFilePath * @throws UtilException */ public static void zip(File[] files, String zipFilePath,String encoding) throws UtilException { if (files == null || files.length == 0) { throw new UtilException("Files Is Null Or Empty!"); } try { File zipFile = new File(zipFilePath); try (ZipArchiveOutputStream zipos = new ZipArchiveOutputStream(zipFile)) { //字符集 zipos.setEncoding(encoding); // 启用64模式 zipos.setUseZip64(Zip64Mode.AsNeeded); // 将每个文件用ZipArchiveEntry封装 // 再用ZipArchiveOutputStream写到压缩文件中 for (File file : files) { if (file != null && file.exists() && file.isFile()) { ZipArchiveEntry archiveEntry = new ZipArchiveEntry(file, file.getName()); zipos.putArchiveEntry(archiveEntry); try (InputStream is = new BufferedInputStream(new FileInputStream(file));) { byte[] buffer = new byte[BUFFER_SIZE * 4]; int len = -1; while ((len = is.read(buffer)) != -1) { // 把缓冲区的字节写入到ZipArchiveEntry zipos.write(buffer, 0, len); } // Writes all necessary data for this entry. zipos.closeArchiveEntry(); } } } zipos.finish(); } } catch (Exception e) { throw new UtilException(e); } } /** * 压缩某个目录 * * @param dir * @param zipFilePath * @throws UtilException */ public static void zip(String dir, String zipFilePath,String encoding) throws UtilException { if (StringUtils.isBlank(dir) || StringUtils.isBlank(zipFilePath)) { throw new UtilException("Dir To Package Or Zip File Can't Be Empty"); } Map<String, File> filesInfo = filesName(dir, dir); Set<String> keys = filesInfo.keySet(); // try { File zipFile = new File(zipFilePath); try (ZipArchiveOutputStream zipos = new ZipArchiveOutputStream(zipFile)) { if (!StringUtils.isBlank(encoding)) { zipos.setEncoding(encoding); } // 启用64模式 zipos.setUseZip64(Zip64Mode.AsNeeded); // 将每个文件用ZipArchiveEntry封装 // 再用ZipArchiveOutputStream写到压缩文件中 Iterator<String> iterator = keys.iterator(); while (iterator.hasNext()) { String string = (String) iterator.next(); File file = filesInfo.get(string); ZipArchiveEntry archiveEntry = new ZipArchiveEntry(file, string); zipos.putArchiveEntry(archiveEntry); try (InputStream is = new BufferedInputStream(new FileInputStream(file));) { byte[] buffer = new byte[BUFFER_SIZE * 4]; int len = -1; while ((len = is.read(buffer)) != -1) { // 把缓冲区的字节写入到ZipArchiveEntry zipos.write(buffer, 0, len); } // Writes all necessary data for this entry. zipos.closeArchiveEntry(); } } zipos.finish(); } } catch (Exception e) { throw new UtilException(e); } } public static Map<String, File> filesName(String dirPath, String rootPath) { Map<String, File> fileInfo = new HashMap<>(); File dir = new File(dirPath); if (dir.exists() && dir.isDirectory()) { File[] files = dir.listFiles(); for (File file : files) { if (file.isDirectory()) { Map<String, File> fs = filesName(file.getPath(), rootPath); fileInfo.putAll(fs); } else { fileInfo.put(file.getPath().replace(rootPath, ""), file); } } } return fileInfo; } public static void main(String[] args) throws UtilException { // String zipPath = "C:\\Users\\xq\\Desktop\\李小强工作交接内容.zip"; // String destDir = "C:\\Users\\xq\\Desktop\\zip"; // unZip(new File(zipPath), destDir); // 打包 // File dir = new File(destDir); // zip(dir.listFiles(), destDir + "\\test.zip"); zip("C:\\Users\\xq\\Desktop\\zip", "C:\\Users\\xq\\Desktop\\test.zip",null); } }工具类最后有调用方式。
https://www.syntaxspace.com/article/283.html
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