Java解压TGZ ，tgz文件-优快云博客

本文介绍如何使用commons-compress.jar工具包解压TGZ文件。通过两个步骤实现：先将TGZ文件转换为临时的TAR文件，再解压TAR文件。提供了完整的Java代码示例。

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最近工作中遇到需要解压tgz文件的问题，找到commons-compress.jar的工具，用起来感觉很不错。官方的例子：http://commons.apache.org/compress/examples.html

解压tgz或者tar.gz文件分成两步：首先先解压成tar文件，然后解压tar文件。我写了一段简单的示例：

package com.taobao;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;

public class Test {
	int buffersize = 2048;

	public static void main(String[] args) {
		String file = "H:\\test.tgz";

		Test o = new Test();

		File f = o.deCompressTGZFile(file);

		o.deCompressTARFile(f);
	}

	public File deCompressTGZFile(String file) {
		return deCompressGZFile(new File(file));
	}

	private File deCompressGZFile(File file) {
		FileOutputStream out = null;
		GzipCompressorInputStream gzIn = null;
		try {
			FileInputStream fin = new FileInputStream(file);
			BufferedInputStream in = new BufferedInputStream(fin);
			File outFile = new File(file.getParent() + File.separator
					+ "tmp.tar");
			out = new FileOutputStream(outFile);
			gzIn = new GzipCompressorInputStream(in);
			final byte[] buffer = new byte[buffersize];
			int n = 0;
			while (-1 != (n = gzIn.read(buffer))) {
				out.write(buffer, 0, n);
			}
			return outFile;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		} finally {
			try {
				out.close();
				gzIn.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	private void deCompressTARFile(File file) {
		String basePath = file.getParent() + File.separator;
		TarArchiveInputStream is = null;
		try {
			is = new TarArchiveInputStream(new FileInputStream(file));
			while (true) {
				TarArchiveEntry entry = is.getNextTarEntry();
				if (entry == null) {
					break;
				}
				if (entry.isDirectory()) {// 这里貌似不会运行到，跟ZipEntry有点不一样
					new File(basePath + entry.getName()).mkdirs();
				} else {
					FileOutputStream os = null;
					try {
						File f = new File(basePath + entry.getName());
						if (!f.getParentFile().exists()) {
							f.getParentFile().mkdirs();
						}
						if (!f.exists()) {
							f.createNewFile();
						}
						os = new FileOutputStream(f);
						byte[] bs = new byte[buffersize];
						int len = -1;
						while ((len = is.read(bs)) != -1) {
							os.write(bs, 0, len);
						}
						os.flush();
					} catch (Exception e) {
						e.printStackTrace();
					} finally {
						os.close();
					}
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				is.close();
				file.delete();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

这段代码仅仅为了使用下common-compress.jar包...:)