java怎么解压压缩包（java实现对rar压缩包的解压）

一、导入相关的依赖包

<dependency> <groupId>com.github.junrar</groupId> <artifactId>junrar</artifactId> <version>7.4.0</version> </dependency>

二、实现相应的工具类

import com.github.junrar.Archive; import com.github.junrar.UnrarCallback; import com.github.junrar.exception.RarException; import com.github.junrar.rarfile.FileHeader; import com.xxx.xxx.xxx.xxx.WkcrWord; import lombok.extern.slf4j.Slf4j; import org.springframework.util.StringUtils; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.util.ArrayList; import java.util.List; @Slf4j public class UnRarFileUtil { /** * @param rarFileName rar file name * @param rarFileName rar file name * @param outFilePath output file path * @param callback callback * @throws Exception */ public static List<WkcrWord> unrar(File f,String rarFileName, String outFilePath, UnrarCallback callback) throws Exception { //解压文件的对象 Archive archive = new Archive(f, callback); if (archive == null) { throw new FileNotFoundException(rarFileName " NOT FOUND!"); } if (archive.isEncrypted()) { throw new Exception(rarFileName " IS ENCRYPTED!"); } List<WkcrWord> wkcrWords=new ArrayList<>(); List<FileHeader> files = archive.getFileHeaders(); for (FileHeader fh : files) { if (fh.isEncrypted()) { throw new Exception(rarFileName " IS ENCRYPTED!"); } String fileName = fh.getFileName(); //获取标准的文件名 if(fileName.contains("\\")){ fileName=fileName.substring(fileName.lastIndexOf("\\") 1); } if (fileName != null && fileName.trim().length() > 0) { String saveFileName = outFilePath fileName; File saveFile = new File(saveFileName); File parent = saveFile.getParentFile(); if (!parent.exists()) { parent.mkdirs(); } if (!saveFile.exists()) { saveFile.createNewFile(); } FileOutputStream fos=null; if(saveFileName.contains(".doc")||saveFileName.contains(".docx")){ fos = new FileOutputStream(saveFile); //获取返回的文件对象的集合 WkcrWord wkcrWord=new WkcrWord(); wkcrWord.setWordUrl(saveFileName); wkcrWord.setName(fileName)； wkcrWords.add(wkcrWord); } try { if(!StringUtils.isEmpty(fos)){ //解压文件输出到对应的目录下 archive.extractFile(fh, fos); } } catch (RarException e) { throw new Exception("unrar error"); } finally { try { if(!StringUtils.isEmpty(fos)){ fos.flush(); fos.close(); } } catch (Exception e) { //自定义抛出异常 throw new RuntimeException("close Exception"); } } } } //----- archive.close(); return wkcrWords; } }

三、方法的调用

List<WkcrWord> wkcrWords = UnRarFileUtil.unrar(f, modelNameAbsoulte, modelFilePath, new UnrarCallback() { int currentProgress = -1; @Override public boolean isNextVolumeReady(Volume volume) { return true; } @Override public void volumeProgressChanged(long l, long l1) { //可以进行解压的百分比计算 int progress = (int) ((double) l / l1 * 100); if (currentProgress != progress) { currentProgress = progress; log.info(progress "%"); } } });