package com.annet.upload.core.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.util.Arrays;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import net.sf.sevenzipjbinding.ExtractOperationResult;
import
 
 net.sf.sevenzipjbinding.IInArchive;
import net.sf.sevenzipjbinding.ISequentialOutStream;
import net.sf.sevenzipjbinding.SevenZip;
import net.sf.sevenzipjbinding.SevenZipException;
import net.sf.sevenzipjbinding.impl.RandomAccessFileInStream;
import net.sf.sevenzipjbinding.simple.ISimpleInArchive;
import
 
 net.sf.sevenzipjbinding.simple.ISimpleInArchiveItem;

public class Un7zUtils {

    private static Logger logger = LoggerFactory.getLogger(Un7zUtils.class);

    /**
     * 
     * @Description (解壓7z)
     * @param file7zPath(7z檔案路徑)
     * @param outPutPath(解壓路徑)
     * @param passWord(檔案密碼.沒有可隨便寫,或空)
     * @return
 

     * @throws Exception
     */
    public static int un7z(String file7zPath, final String outPutPath, String passWord) throws Exception {
        IInArchive archive;
        RandomAccessFile randomAccessFile;
        randomAccessFile = new RandomAccessFile(file7zPath, "r");
        archive = SevenZip.openInArchive(null, new RandomAccessFileInStream(randomAccessFile), passWord);
        int numberOfItems = archive.getNumberOfItems();
        ISimpleInArchive simpleInArchive = archive.getSimpleInterface();
        for (final ISimpleInArchiveItem item : simpleInArchive.getArchiveItems()) {
            final int[] hash = new int[] { 0 };
            if (!item.isFolder()) {
                ExtractOperationResult result;
                final long[] sizeArray = new long[1];
                result = item.extractSlow(new ISequentialOutStream() {
                    public int write(byte[] data) throws SevenZipException {
                        try {
                            String str = item.getPath();
                            str = str.substring(0, str.lastIndexOf(File.separator));
                            File file = new File(outPutPath + File.separator + str + File.separator);
                            if (!file.exists()) {
                                file.mkdirs();
                            }
                            File file1 = new File(outPutPath + File.separator + item.getPath());
                            IOUtils.write(data, new FileOutputStream(file1, true));
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        hash[0] ^= Arrays.hashCode(data); // Consume data
                        sizeArray[0] += data.length;
                        return data.length; // Return amount of consumed
                    }
                }, passWord);
                if (result == ExtractOperationResult.OK) {
                    logger.error("解壓成功...." + String.format("%9X | %10s | %s", hash[0], sizeArray[0], item.getPath()));
                } else {
                    logger.error("解壓失敗：密碼錯誤或者其他錯誤...." + result);
                }
            }
        }
        archive.close();
        randomAccessFile.close();

        return numberOfItems;
    }

    /**
     * 遞迴刪除資料夾
     * 
     * @param file
     */
    public static void deleteFile(File file) {
        if (file.exists()) { // 判斷檔案是否存在
            if (file.isFile()) { // 判斷是否是檔案
                file.delete(); // 刪除檔案
            } else if (file.isDirectory()) { // 否則如果它是一個目錄
                File[] files = file.listFiles(); // 宣告目錄下所有的檔案 files[];
                for (int i = 0; i < files.length; i++) { // 遍歷目錄下所有的檔案
                    deleteFile(files[i]); // 把每個檔案用這個方法進行迭代
                }
                file.delete(); // 刪除資料夾
            }
        }
    }
}

maven依賴jar

<dependency>
    <groupId>net.sf.sevenzipjbinding</groupId>
    <artifactId>sevenzipjbinding</artifactId>
    <version>9.20-2.00beta</version>
</dependency>

<dependency>
    <groupId>net.sf.sevenzipjbinding</groupId>
    <artifactId>sevenzipjbinding-all-platforms</artifactId>
    <version>9.20-2.00beta</version>
</dependency>