一、导入相关的依赖包

   com.github.junrar   junrar   7.4.0

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;@Slf4jpublic 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 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 wkcrWords=new ArrayList<>();        List 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 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 + "%");        }    }});