第一种：
public class fileZipUtil {public static void unZipFiles(String inputFile,String destDirPath) throws Exception {File srcFile = new File(inputFile);//获取当前压缩文件// 判断源文件是否存在if (!srcFile.exists()) {throw new Exception(srcFile.getPath() + "所指文件不存在");}ZipFile zipFile = new ZipFile(srcFile, Charset.forName("GBK"));//创建压缩文件对象//开始解压Enumeration entries = zipFile.entries();while (entries.hasMoreElements()) {ZipEntry entry = (ZipEntry) entries.nextElement();// 如果是文件夹，就创建个文件夹if (entry.isDirectory()) {String dirPath = destDirPath + "/" + entry.getName();srcFile.mkdirs();} else {// 如果是文件，就先创建一个文件，然后用io流把内容copy过去File targetFile = new File(destDirPath + "/" + entry.getName());// 保证这个文件的父文件夹必须要存在if (!targetFile.getParentFile().exists()) {targetFile.getParentFile().mkdirs();}targetFile.createNewFile();// 将压缩文件内容写入到这个文件中InputStream is = zipFile.getInputStream(entry);FileOutputStream fos = new FileOutputStream(targetFile);int len;byte[] buf = new byte[1024];while ((len = is.read(buf)) != -1) {fos.write(buf, 0, len);}// 关流顺序，先打开的后关闭fos.close();is.close();}}}public static void unRarFile(String rarPath, String dstDir) throws Exception {File dstDiretory = new File(dstDir);if (!dstDiretory.exists()) {dstDiretory.mkdirs();}try {File rarFile= new File(rarPath);Archive archive = new Archive(new FileInputStream(rarFile));List fileHeaders = archive.getFileHeaders();for (FileHeader fileHeader : fileHeaders) {if (fileHeader.isDirectory()) { String fileName= fileHeader.getFileNameW();if(!existZH(fileName)){fileName = fileHeader.getFileNameString();}File dir = new File(dstDir + File.separator + fileName);if (!dir.exists()){dir.mkdirs();}} else {String fileName= fileHeader.getFileNameW().trim();if(!existZH(fileName)){fileName = fileHeader.getFileNameString().trim();}File file = new File(dstDir + File.separator + fileName);try {if (!file.exists()) {if (!file.getParentFile().exists()) {file.getParentFile().mkdirs();}file.createNewFile();}FileOutputStream os = new FileOutputStream(file);archive.extractFile(fileHeader, os);os.close();} catch (Exception ex) {throw ex;}}}archive.close();} catch (Exception e) {throw e;}}public static boolean existZH(String str) {String regEx = "[\\u4e00-\\u9fa5]";Pattern p = Pattern.compile(regEx);Matcher m = p.matcher(str);while (m.find()) {return true;}return false;} //使用main方法进行测试public static void main(String[] args) {try {String filepath = "E:\\test\\测试1.rar";String newpath="E:\\test\\zipTest";//获取最后一个.的位置int lastIndexOf = filepath.lastIndexOf(".");//获取文件的后缀名 .jpgString suffix = filepath.substring(lastIndexOf);System.out.println(suffix);if(suffix.equals(".zip")){unZipFiles(filepath,newpath);}else if(suffix.equals(".rar")){unRarFile(filepath,newpath);}} catch (Exception e) {e.printStackTrace();}}} 第二种：
// 获取本地rarpublic void unRarByPath() { String rarPath = "D:\\文件.rar"; try { File outFileDir = new File(rarPath); Archive archive = new Archive(new FileInputStream(rarFile)); FileHeader fileHeader; while ((fileHeader = archive.nextFileHeader()) != null) { // 解决文件名中文乱码问题 String fileName = fileHeader.getFileNameW().isEmpty() ? fileHeader.getFileNameString() : fileHeader.getFileNameW(); String fileExt = fileName.substring(fileName.lastIndexOf(FileConstant.FILE_SEPARATOR) + 1); System.out.println(fileName); ByteArrayOutputStream os = new ByteArrayOutputStream(); archive.extractFile(fileHeader, os); // 将文件信息写到byte数组中 byte[] bytes = os.toByteArray(); System.out.println(bytes.length); if ("rar".equals(fileExt)) { Archive secondArchive = new Archive(new ByteArrayInputStream(bytes)); // 循环解压 } } } catch (IOException e) { e.printStackTrace(); }}第三种：
public static String unRarFile(String srcRarPath, String dstDirectoryPath) throws Exception { log.debug("unRarFile srcRarPath:{}, dstDirectoryPath:{}", srcRarPath, dstDirectoryPath); if (!srcRarPath.toLowerCase().endsWith(".rar")) { log.warn("srcFilePath is not rar file"); return ""; } File dstDiretory = new File(dstDirectoryPath); // 目标目录不存在时，创建该文件夹 if (!dstDiretory.exists()) { dstDiretory.mkdirs(); } // @Cleanup Archive archive = new Archive(new File(srcRarPath)); com.github.junrar 0.7版本jarAPI @Cleanup Archive archive = new Archive(new FileInputStream(new File(srcRarPath))); if (archive != null) { // 打印文件信息 archive.getMainHeader().print(); FileHeader fileHeader = archive.nextFileHeader(); while (fileHeader != null) { // 解决中文乱码问题【压缩文件中文乱码】 String fileName = fileHeader.getFileNameW().isEmpty() ? fileHeader.getFileNameString() : fileHeader.getFileNameW(); // 文件夹 if (fileHeader.isDirectory()) { File fol = new File(dstDirectoryPath + File.separator + fileName.trim()); fol.mkdirs(); } else { // 文件 // 解决linux系统中\分隔符无法识别问题 String[] fileParts = fileName.split("\\\\"); StringBuilder filePath = new StringBuilder(); for (String filePart : fileParts) { filePath.append(filePart).append(File.separator); } fileName = filePath.substring(0, filePath.length() - 1); File out = new File(dstDirectoryPath + File.separator + fileName.trim()); if (!out.exists()) { // 相对路径可能多级，可能需要创建父目录. if (!out.getParentFile().exists()) {out.getParentFile().mkdirs(); } out.createNewFile(); } @Cleanup FileOutputStream os = new FileOutputStream(out); archive.extractFile(fileHeader, os); } fileHeader = archive.nextFileHeader(); } } else { log.warn("rar file decompression failed , archive is null"); } return dstDirectoryPath; }来源地址：https://blog.csdn.net/qq_45350099/article/details/131199431
