java解压rar压缩包嵌套gz压缩包
时间: 2023-08-27 12:05:11 浏览: 124
Java可以使用Apache Commons Compress库来解压RAR压缩包和嵌套的GZ压缩包。以下是一个示例代码:
```java
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;
import org.apache.commons.compress.compressors.CompressorInputStream;
import org.apache.commons.compress.compressors.CompressorStreamFactory;
import java.io.*;
public class Unpacker {
public static void main(String[] args) throws IOException, ArchiveException {
String rarFilePath = "path/to/rar/file.rar";
String outputDirPath = "path/to/output/dir";
// 创建RAR文件输入流
FileInputStream rarFileInputStream = new FileInputStream(rarFilePath);
ArchiveInputStream rarArchiveInputStream = new ArchiveStreamFactory().createArchiveInputStream(ArchiveStreamFactory.RAR, rarFileInputStream);
// 遍历RAR文件中的所有文件
ArchiveEntry rarEntry;
while ((rarEntry = rarArchiveInputStream.getNextEntry()) != null) {
String entryName = rarEntry.getName();
long entrySize = rarEntry.getSize();
// 如果是GZ文件,则继续解压
if (entryName.endsWith(".gz")) {
// 创建GZ文件输入流
InputStream gzInputStream = new BufferedInputStream(rarArchiveInputStream);
CompressorInputStream gzCompressorInputStream = new CompressorStreamFactory().createCompressorInputStream(CompressorStreamFactory.GZIP, gzInputStream);
// 创建输出流,将解压后的文件写入输出流
String outputFilePath = outputDirPath + File.separator + entryName.substring(0, entryName.length() - 3);
FileOutputStream outputStream = new FileOutputStream(outputFilePath);
byte[] buffer = new byte[1024];
int n;
while ((n = gzCompressorInputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, n);
}
// 关闭输出流和GZ文件输入流
outputStream.close();
gzCompressorInputStream.close();
}
}
// 关闭RAR文件输入流
rarArchiveInputStream.close();
rarFileInputStream.close();
}
}
```
在上面的示例代码中,我们首先创建一个RAR文件输入流,然后使用Apache Commons Compress库的`ArchiveStreamFactory.createArchiveInputStream()`方法创建一个RAR文件归档输入流。接下来,我们遍历RAR文件中的所有文件,如果发现一个GZ文件,就创建一个GZ文件输入流,使用Apache Commons Compress库的`CompressorStreamFactory.createCompressorInputStream()`方法创建一个GZ文件压缩输入流。然后,我们创建一个输出流,将解压后的文件写入输出流。最后,我们关闭所有的输入流和输出流。
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