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java解压缩zip、rar

java解压缩zip、rar

作者: 莫生人 | 来源:发表于2021-12-08 00:00 被阅读0次

    解压缩zip

    1.使用hutool工具包中ZipUtil工具类

    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.7.2</version>
    </dependency>
    

    使用比较简单,下面只是其中一种用法(当然还有其他的使用方法,请自行查看源码):

    ZipUtil.unzip(f.getAbsolutePath(), Charset.forName("GBK"));
    

    参数是压缩包路径和编码,使用GBK是为了解决中文解压缩乱码的问题,测试使用了其他字符集,解压缩后中文都是乱码。

    2.使用zip4j工具包

    <dependency>
        <groupId>net.lingala.zip4j</groupId>
        <artifactId>zip4j</artifactId>
        <version>2.9.1</version>
    </dependency>
    

    使用比hutool工具包稍复杂一点:

    ZipFile zipFile = new ZipFile(f.getAbsolutePath());
    zipFile.setCharset(Charset.forName("GBK"));
    File zdir = new File(f.getAbsolutePath().substring(0, f.getAbsolutePath().indexOf(".")));
    if (!zdir.isDirectory()) {
        zdir.mkdir();
    }
    try {
        zipFile.extractAll(zdir.getAbsolutePath());
    } catch (ZipException e) {
        e.printStackTrace();
    }
    

    字符集同样使用GBK,否则解压后中文也是乱码。zipFile.extractAll是解压到指定文件夹。

    解压缩rar

    1.使用junrar工具包

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

    调用方式:

    File zdir = new File(f.getAbsolutePath().substring(0, f.getAbsolutePath().indexOf(".")));
    if (!zdir.isDirectory()) {
        zdir.mkdir();
    }
    try {
        Junrar.extract(f.getAbsolutePath(), zdir.getAbsolutePath());
    } catch (IOException e) {
        e.printStackTrace();
    } catch (RarException e) {
        e.printStackTrace();
    }
    

    运行测试,居然报错:

    23:31:45.233 [main] WARN com.github.junrar.Archive - Support for rar version 5 is not yet implemented!
    23:31:45.247 [main] WARN com.github.junrar.Archive - exception in archive constructor maybe file is encrypted, corrupt or support not yet implemented
    com.github.junrar.exception.UnsupportedRarV5Exception: null
    

    junrar不支持rar5的解压缩!!!我曹,无情!!!
    继续百度一番,没有找到其他方案,晚上在简书上,努力翻找,找到了新的解决方案,如下!

    2.使用sevenzipjbinding

    <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>
    

    原文作者说,某些情况,由于文件编码问题,可能会出现乱码的情况,但是API上没有参数可以设置编码。但个人示例测试暂时没有发现乱码问题,贴下示例代码:

    try {
       // f -  压缩文件
       RandomAccessFile randomAccessFile = new RandomAccessFile(f.getAbsolutePath(), "r");
       IInArchive archive = SevenZip.openInArchive(ArchiveFormat.RAR5,  new RandomAccessFileInStream(randomAccessFile));
       // 解压文件路径
       File zdir = new File( f.getAbsolutePath().substring(0,  f.getAbsolutePath() .indexOf(".")));
       if (!zdir.isDirectory()) {
           zdir.mkdir();
       }
    
       int[] in = new int[archive.getNumberOfItems()];
       for(int i=0;i<in.length;i++){
           in[i] = i;
       }
       archive.extract(in, false, new ExtractCallback(archive, zdir.getAbsolutePath()));
       archive.close();
       randomAccessFile.close();
    } catch (FileNotFoundException | SevenZipException e) {
       e.printStackTrace();
    } catch (IOException e) {
       e.printStackTrace();
    }
    
    private static class ExtractCallback implements IArchiveExtractCallback {
        private final IInArchive inArchive;
        private final String extractPath;
        public ExtractCallback(IInArchive inArchive, String extractPath) {
            this.inArchive = inArchive;
            if (!extractPath.endsWith("/") && !extractPath.endsWith("\\")) {
                extractPath += File.separator;
            }
            this.extractPath = extractPath;
        }
    
        @Override
        public void setTotal(long total) {
    
        }
    
        @Override
        public void setCompleted(long complete) {
    
        }
    
        @Override
        public ISequentialOutStream getStream(int index, ExtractAskMode extractAskMode) throws SevenZipException {
            return data -> {
                String filePath = inArchive.getStringProperty(index, PropID.PATH);
                FileOutputStream fos = null;
                try {
                    File path = new File(extractPath + filePath);
                    if(!path.getParentFile().exists()){
                        path.getParentFile().mkdirs();
                    }
    
            if(!path.exists()){
                path.createNewFile();
            }
            fos = new FileOutputStream(path, true);
            fos.write(data);
                } catch (IOException e) {
            log.info("IOException while extracting " + filePath);
            } finally{
                try {
                if(fos != null){
                fos.flush();
                fos.close();
                }
            } catch (IOException e) {
                log.error("Could not close FileOutputStream", e);
            }
            }
            return data.length;
        };
        }
    
        @Override
        public void prepareOperation(ExtractAskMode extractAskMode) {
    
        }
    
        @Override
        public void setOperationResult(ExtractOperationResult extractOperationResult) {
        }
    }
    

    最后,有兴趣还可以看一下Apache的common-compress,http://commons.apache.org/proper/commons-compress/examples.html,也可以对很多类型的压缩文件进行操作,好像没有rar格式的!!!

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