Java解压rar5压缩包

Java解压rar5压缩包

最近有一个需求，需要下载rar压缩包并解压，直接度娘的方法只能解压rar4及以前版本的压缩包，多花了点时间还是找到了解决方案，防止以后还会遇到就记录一下

• 原文连接： www.cnblogs.com/fan93/p/150…

需要的maven依赖

<dependency>
    <groupId>com.github.axet</groupId>
    <artifactId>java-unrar</artifactId>
    <version>1.7.0-8</version>
</dependency>
<dependency>
    <groupId>net.sf.sevenzipjbinding</groupId>
    <artifactId>sevenzipjbinding</artifactId>
    <version>16.02-2.01</version>
</dependency>
<dependency>
    <groupId>net.sf.sevenzipjbinding</groupId>
    <artifactId>sevenzipjbinding-all-platforms</artifactId>
    <version>16.02-2.01</version>
</dependency>

package org.jeecg.modules.utils.unRar;

import net.sf.sevenzipjbinding.*;

import java.io.*;

public class ExtractCallback implements IArchiveExtractCallback{
    private int index;
    private IInArchive inArchive;
    private String ourDir;

    public ExtractCallback(IInArchive inArchive, String ourDir) {
        this.inArchive = inArchive;
        this.ourDir = ourDir;
    }

    @Override
    public void setCompleted(long arg0) throws SevenZipException {
    }

    @Override
    public void setTotal(long arg0) throws SevenZipException {
    }

    @Override
    public ISequentialOutStream getStream(int index, ExtractAskMode extractAskMode) throws SevenZipException {
        this.index = index;
        final String path = (String) inArchive.getProperty(index, PropID.PATH);
        final boolean isFolder = (boolean) inArchive.getProperty(index, PropID.IS_FOLDER);
        return data -> {
            try {
                if (!isFolder) {
                    File file = new File(ourDir + path);
                    save2File(file, data);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return data.length;
        };
    }

    @Override
    public void prepareOperation(ExtractAskMode arg0) throws SevenZipException {
    }

    @Override
    public void setOperationResult(ExtractOperationResult extractOperationResult) throws SevenZipException {

    }

    public static boolean save2File(File file, byte[] msg) {
        OutputStream fos = null;
        try {
            File parent = file.getParentFile();
            if ((!parent.exists()) && (!parent.mkdirs())) {
                return false;
            }
            fos = new FileOutputStream(file, true);
            fos.write(msg);
            fos.flush();
            return true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        } finally {
            try {
                fos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

package org.jeecg.modules.utils.unRar;

import net.sf.sevenzipjbinding.IInArchive;
import net.sf.sevenzipjbinding.SevenZip;
import net.sf.sevenzipjbinding.impl.RandomAccessFileInStream;

import java.io.RandomAccessFile;

public class TmsUnRarUtil {
    /*
     * @param unFilePath: 压缩包路径
     * @param outPath: 解压到那个路径
     * @throws Exception
     * @return void
     */
    public static void unRar(String unFilePath, String outPath) throws Exception{
        IInArchive archive;
        RandomAccessFile randomAccessFile;
        // 第一个参数是需要解压的压缩包路径，第二个参数参考JdkAPI文档的RandomAccessFile
        //r代表以只读的方式打开文本，也就意味着不能用write来操作文件
        randomAccessFile = new RandomAccessFile(unFilePath, "r");
        archive = SevenZip.openInArchive(null, // null - autodetect
                new RandomAccessFileInStream(randomAccessFile));
        int[] in = new int[archive.getNumberOfItems()];
        for (int i = 0; i < in.length; i++) {
            in[i] = i;
        }
        archive.extract(in, false, new ExtractCallback(archive,outPath + "/"));
        archive.close();
        randomAccessFile.close();
    }
}