GZ通过tar压缩和解压文件夹

wdhdmx

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.getName();FileInputStream in = new FileInputStream(filename);TarEntry tarEn = new TarEntry(files);tarEn.setName(files.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\\");}}