java 压缩/解压 .zip/.rar/.tar 文件，大家一起讨论，学习

import org.apache.tools.tar.TarEntry;

import org.apache.tools.tar.TarOutputStream;

import org.apache.tools.zip.ZipEntry;

import org.apache.tools.zip.ZipFile;

import org.apache.tools.zip.ZipOutputStream;



import de.innosystec.unrar.Archive;



/** 

 * @author Every E-mail/MSN:mwgjkf@hotmail.com

 *   QQ:30130942

 * @version 创建时间：Feb 26, 2009 6:01:11 PM 

 * 类说明:压缩、解压文件公用类

 *

 */

public class Decompression {

private static final int BUFFEREDSIZE = 1024;

    

	/**

	 * 解压zip格式的压缩文件到指定位置

	 * @param zipFileName 压缩文件

	 * @param extPlace 解压目录

	 * @throws Exception

	 */

	@SuppressWarnings("unchecked")

	public synchronized void unzip(String zipFileName, String extPlace) throws Exception {

		try {

	    	(new File(extPlace)).mkdirs();

		    File f = new File(zipFileName);

		    ZipFile zipFile = new ZipFile(zipFileName);

		    if((!f.exists()) && (f.length() <= 0)) {

		    	throw new Exception("要解压的文件不存在!");

		    }

		    String strPath, gbkPath, strtemp;

		    File tempFile = new File(extPlace);

		    strPath = tempFile.getAbsolutePath();

		    java.util.Enumeration e = zipFile.getEntries();

		    while(e.hasMoreElements()){

			    org.apache.tools.zip.ZipEntry zipEnt = (ZipEntry) e.nextElement();

			    gbkPath=zipEnt.getName();

			    if(zipEnt.isDirectory()){

				    strtemp = strPath + File.separator + gbkPath;

				    File dir = new File(strtemp);

				    dir.mkdirs();

				    continue;

			    } else {

				    //读写文件

				    InputStream is = zipFile.getInputStream(zipEnt);

				    BufferedInputStream bis = new BufferedInputStream(is);

				    gbkPath=zipEnt.getName();

				    strtemp = strPath + File.separator + gbkPath;

				

				    //建目录

				    String strsubdir = gbkPath;

				    for(int i = 0; i < strsubdir.length(); i++) {

					    if(strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {

						    String temp = strPath + File.separator + strsubdir.substring(0, i);

						    File subdir = new File(temp);

						    if(!subdir.exists())

						    subdir.mkdir();

					    }

				    }

				    FileOutputStream fos = new FileOutputStream(strtemp);

				    BufferedOutputStream bos = new BufferedOutputStream(fos);

				    int c;

				    while((c = bis.read()) != -1) {

				    	bos.write((byte) c);

				    }

				    bos.close();

				    fos.close();

			    }

		    }

	    } catch(Exception e) {

		    e.printStackTrace();

		    throw e;

	    }

	}

	

	/**

	 * 解压zip格式的压缩文件到指定位置

	 * @param zipFileName 压缩文件

	 * @param extPlace 解压目录

	 * @throws Exception

	 */

	@SuppressWarnings("unchecked")

	public synchronized void unzip(String zipFileName, String extPlace,boolean whether) throws Exception {

		try {

	    	(new File(extPlace)).mkdirs();

		    File f = new File(zipFileName);

		    ZipFile zipFile = new ZipFile(zipFileName);

		    if((!f.exists()) && (f.length() <= 0)) {

		    	throw new Exception("要解压的文件不存在!");

		    }

		    String strPath, gbkPath, strtemp;

		    File tempFile = new File(extPlace);

		    strPath = tempFile.getAbsolutePath();

		    java.util.Enumeration e = zipFile.getEntries();

		    while(e.hasMoreElements()){

			    org.apache.tools.zip.ZipEntry zipEnt = (ZipEntry) e.nextElement();

			    gbkPath=zipEnt.getName();

			    if(zipEnt.isDirectory()){

				    strtemp = strPath + File.separator + gbkPath;

				    File dir = new File(strtemp);

				    dir.mkdirs();

				    continue;

			    } else {

				    //读写文件

				    InputStream is = zipFile.getInputStream(zipEnt);

				    BufferedInputStream bis = new BufferedInputStream(is);

				    gbkPath=zipEnt.getName();

				    strtemp = strPath + File.separator + gbkPath;

				

				    //建目录

				    String strsubdir = gbkPath;

				    for(int i = 0; i < strsubdir.length(); i++) {

					    if(strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {

						    String temp = strPath + File.separator + strsubdir.substring(0, i);

						    File subdir = new File(temp);

						    if(!subdir.exists())

						    subdir.mkdir();

					    }

				    }

				    FileOutputStream fos = new FileOutputStream(strtemp);

				    BufferedOutputStream bos = new BufferedOutputStream(fos);

				    int c;

				    while((c = bis.read()) != -1) {

				    	bos.write((byte) c);

				    }

				    bos.close();

				    fos.close();

			    }

		    }

	    } catch(Exception e) {

		    e.printStackTrace();

		    throw e;

	    }

	}

	/**

	 * 压缩zip格式的压缩文件

	 * @param inputFilename 压缩的文件或文件夹及详细路径

	 * @param zipFilename 输出文件名称及详细路径

	 * @throws IOException

	 */

	public synchronized void zip(String inputFilename, String zipFilename) throws IOException {

		zip(new File(inputFilename), zipFilename);

	}

	

	/**

	 * 压缩zip格式的压缩文件

	 * @param inputFile 需压缩文件

	 * @param zipFilename 输出文件及详细路径

	 * @throws IOException

	 */

	public synchronized void zip(File inputFile, String zipFilename) throws IOException {

		ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFilename));

		try {

			zip(inputFile, out, "");

		} catch (IOException e) {

			throw e;

		} finally {

			out.close();

		}

	}

	

	/**

	 * 压缩zip格式的压缩文件

	 * @param inputFile 需压缩文件

	 * @param out 输出压缩文件

	 * @param base 结束标识

	 * @throws IOException

	 */

	@SuppressWarnings("unused")

	private synchronized void zip(File inputFile, ZipOutputStream out, String base) throws IOException {

		if (inputFile.isDirectory()) {

			File[] inputFiles = inputFile.listFiles();

			out.putNextEntry(new ZipEntry(base + "/"));

			base = base.length() == 0 ? "" : base + "/";

			for (int i = 0; i < inputFiles.length; i++) {

				zip(inputFiles[i], out, base + inputFiles[i].getName());

			}

		} else {

			if (base.length() > 0) {

				out.putNextEntry(new ZipEntry(base));

			} else {

				out.putNextEntry(new ZipEntry(inputFile.getName()));

			}

			FileInputStream in = new FileInputStream(inputFile);

			try {

				int c;

				byte[] by = new byte[BUFFEREDSIZE];

				while ((c = in.read(by)) != -1) {

					out.write(by, 0, c);

				}

			} catch (IOException e) {

				throw e;

			} finally {

				in.close();

			}

		}

	}

    /**

     * 解压rar格式的压缩文件到指定目录下

     * @param rarFileName 压缩文件

     * @param extPlace 解压目录

     * @throws Exception

     */

	public synchronized void unrar(String rarFileName, String extPlace) throws Exception{

		try {

			(new File(extPlace)).mkdirs();

			// 构建测解压缩类

			Archive archive = new Archive();

			archive.setEnabledLog(false); //不输出日志

			// 设置rar文件

			archive.setFile(rarFileName);

			archive.setExtractPath(extPlace);

			archive.extractAllFile();

		} catch (Exception e) {

			// TODO: handle exception

		}

	}



}

unrarCmd=C:\\WinRAR\\UnRar x 

Runtime rt = Runtime.getRuntime();

Process process = rt.exec(unrarCmd + 文件名);