GZ通过tar压缩和解压文件夹

查了好长时间，java中好像GZ只可以压缩单个文件。

根据网上的资料，用tar过度，写了一个完整的压缩和解压。

只是功能的实现，压缩的文件夹下面不能有文件夹，只能有文件，传入的目录必须存在，最后解压的目录也必须存在。

要导入一个包 ant.jar，我上传了，在附件里

 

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import org.apache.tools.tar.TarEntry;
import org.apache.tools.tar.TarInputStream;
import org.apache.tools.tar.TarOutputStream;

public class GZyasuojieya {
	private static int BUFFER = 1024 * 4;
	private static byte[] B_ARRAY = new byte[BUFFER];

	/**
	 * file变为tar文件
	 */
	private static void file2tar(String filesPath, String tarPath) {
		File fileDirectory = new File(filesPath);
		int length = fileDirectory.listFiles().length;
		File[] files = fileDirectory.listFiles();
		try {
			File tarFile = new File(tarPath);
			tarFile.createNewFile();
			FileOutputStream fout = new FileOutputStream(tarFile);
			TarOutputStream tout = new TarOutputStream(fout);
			for (int i = 0; i < length; i++) {
				String filename = fileDirectory.getPath() + File.separator
						+ files[i].getName();
				FileInputStream in = new FileInputStream(filename);
				TarEntry tarEn = new TarEntry(files[i]);
				tarEn.setName(files[i].getName());
				tout.putNextEntry(tarEn);
				int num;
				while ((num = in.read(B_ARRAY)) != -1) {
					tout.write(B_ARRAY, 0, num);
				}
				tout.closeEntry();
				in.close();
			}
			tout.close();
			fout.close();
		} catch (FileNotFoundException e) {
			System.out.println(e);
		} catch (IOException e) {
			System.out.println(e);
		}
	}

	/**
	 * 传入tar的文件路径，产生GZ包
	 * 
	 * @return
	 */
	public static void tar2gz(String tarPath, String gzPath) {
		File srcFile = new File(tarPath);
		File targetFile = new File(gzPath);
		try {
			FileInputStream in = null;
			GZIPOutputStream out = null;
			in = new FileInputStream(srcFile);
			out = new GZIPOutputStream(new FileOutputStream(targetFile));
			int number = 0;
			while ((number = in.read(B_ARRAY, 0, BUFFER)) != -1) {
				out.write(B_ARRAY, 0, number);
			}
			in.close();
			out.close();
		} catch (Exception e) {
			System.out.println(e);

		}
	}

	/**
	 * gz包变为tar文件
	 */
	public static void gz2tar(String gzPath, String tarPath) {
		try {
			GZIPInputStream gzin = new GZIPInputStream(new FileInputStream(
					gzPath));
			OutputStream out = new FileOutputStream(tarPath);
			int number = 0;
			while ((number = gzin.read(B_ARRAY, 0, BUFFER)) != -1) {
				out.write(B_ARRAY, 0, number);
			}
			gzin.close();
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * tar 文件变为files
	 */
	public static void tar2files(String tarPath, String filesPath) {
		try {
			FileOutputStream out = null;
			TarInputStream in = new TarInputStream(new FileInputStream(tarPath));
			TarEntry entry = null;
			File outFile = null;
			while ((entry = in.getNextEntry()) != null) {
				outFile = new File(filesPath + entry.getName());
				outFile.createNewFile();
				out = new FileOutputStream((outFile));
				int number;
				while ((number = in.read(B_ARRAY, 0, BUFFER)) != -1) {
					out.write(B_ARRAY, 0, number);
				}
				// while (true) {
				// int readsize = in.read(B_ARRAY);
				// out.write(B_ARRAY);
				// if (readsize < BUFFER) {
				// break;
				// }
				// }
			}
			out.close();
			in.close();
		} catch (Exception e) {
		}
	}

	public static void main(String args[]) {
		String filesPath = "D:\\123";
		String tarPath = "D:\\123.tar";
		String gzPath = "D:\\123.tar.gz";
		 file2tar(filesPath, tarPath);
		 tar2gz(tarPath,gzPath);
		gz2tar(gzPath, tarPath);
		tar2files(tarPath, "D:\\123\\");
	}
}