java中打包和解包

package com.test.xml;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

public class ZipManager {

	/**
	 * 
	 * @param baseDir
	 *            所要压缩的目录名（包含绝对路径）
	 * @param objFileName
	 *            压缩后的文件名
	 * @throws Exception
	 */
	public void createZip(String baseDir, String objFileName) throws Exception {
		File folderObject = new File(baseDir);

		if (folderObject.exists()) {
			List fileList = getSubFiles(new File(baseDir));

			// 压缩文件名
			ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(
					objFileName));

			ZipEntry ze = null;
			byte[] buf = new byte[1024];
			int readLen = 0;
			for (int i = 0; i < fileList.size(); i++) {
				File f = (File) fileList.get(i);
				System.out.println("Adding: " + f.getPath() + f.getName());

				// 创建一个ZipEntry，并设置Name和其它的一些属性
				ze = new ZipEntry(getAbsFileName(baseDir, f));
				ze.setSize(f.length());
				ze.setTime(f.lastModified());

				// 将ZipEntry加到zos中，再写入实际的文件内容
				zos.putNextEntry(ze);
				InputStream is = new BufferedInputStream(new FileInputStream(f));
				while ((readLen = is.read(buf, 0, 1024)) != -1) {
					zos.write(buf, 0, readLen);
				}
				is.close();
				System.out.println("done...");
			}
			zos.close();
		} else {
			throw new Exception("this folder isnot exist!");
		}
	}

	/**
	 * zip压缩功能测试. 将指定文件压缩后存到一压缩文件中
	 * 
	 * @param sourceFileName
	 *            所要压缩的文件名
	 * @param zipFilename
	 *            压缩后的文件名
	 * @return 压缩后文件的大小
	 * @throws Exception
	 */
	public long createFileToZip(String zipFilename, String sourceFileName)
			throws Exception {

		File sourceFile = new File(sourceFileName);

		byte[] buf = new byte[1024];

		// 压缩文件名
		File objFile = new File(zipFilename);

		ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(objFile));

		ZipEntry ze = null;
		// 创建一个ZipEntry，并设置Name和其它的一些属性
		ze = new ZipEntry(sourceFile.getName());
		ze.setSize(sourceFile.length());
		ze.setTime(sourceFile.lastModified());

		// 将ZipEntry加到zos中，再写入实际的文件内容
		zos.putNextEntry(ze);

		InputStream is = new BufferedInputStream(
				new FileInputStream(sourceFile));

		int readLen = -1;
		while ((readLen = is.read(buf, 0, 1024)) != -1) {
			zos.write(buf, 0, readLen);
		}
		is.close();
		zos.close();

		return objFile.length();
	}

	/**
	 * 压缩多个文件
	 * @param zipFileName 
	 * 				要压缩后的压缩文件名
	 * @param lstFileName
	 * 				要压缩的文件名集合
	 * 
	 * @return 压缩后文件大小
	 * @throws Exception
	 */
	public long createFileToZip(String zipFileName, List<String> lstFileName) throws Exception {
		File objFile = new File(zipFileName);
		ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(
				objFile));

		if (lstFileName != null) {
			for (int i = 1; i < lstFileName.size(); i++) {
				File sourceFile = new File(lstFileName.get(i));

				byte[] buf = new byte[1024];

				ZipEntry ze = null;
				// 创建一个ZipEntry，并设置Name和其它的一些属性
				ze = new ZipEntry(sourceFile.getName());
				ze.setSize(sourceFile.length());
				ze.setTime(sourceFile.lastModified());

				// 将ZipEntry加到zos中，再写入实际的文件内容
				zos.putNextEntry(ze);

				InputStream is = new BufferedInputStream(new FileInputStream(
						sourceFile));

				int readLen = -1;
				while ((readLen = is.read(buf, 0, 1024)) != -1) {
					zos.write(buf, 0, readLen);
				}
				is.close();
			}

			zos.close();			
		}
		
		return objFile.length();
	}
	
	/**
	 * zip压缩功能测试. 将指定文件压缩后存到一压缩文件中
	 * 
	 * @param sourceFile
	 *            所要压缩的文件名
	 * @param zipFile
	 *            压缩后的文件名
	 * @return 压缩后文件的大小
	 * @throws Exception
	 */
	public long createFileToZip(File sourceFile, File zipFile)
			throws IOException {

		byte[] buf = new byte[1024];

		// 压缩文件名
		File objFile = zipFile;

		ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(objFile));

		ZipEntry ze = null;
		// 创建一个ZipEntry，并设置Name和其它的一些属性
		ze = new ZipEntry(sourceFile.getName());
		ze.setSize(sourceFile.length());
		ze.setTime(sourceFile.lastModified());

		// 将ZipEntry加到zos中，再写入实际的文件内容
		zos.putNextEntry(ze);

		InputStream is = new BufferedInputStream(
				new FileInputStream(sourceFile));

		int readLen = -1;
		while ((readLen = is.read(buf, 0, 1024)) != -1) {
			zos.write(buf, 0, readLen);
		}
		is.close();
		zos.close();

		return objFile.length();
	}

	/**
	 * @param sourceZip
	 * 				要解压的文件名
	 * @param ourFileName
	 * 				解压后的文件路径
	 * 
	 * @throws IOException
	 */
	public void releaseZipToFile(String sourceZip, String outFileName)
			throws IOException {
		ZipFile zfile = new ZipFile(sourceZip);
		System.out.println(zfile.getName());
		Enumeration zList = zfile.entries();
		ZipEntry ze = null;
		byte[] buf = new byte[1024];
		while (zList.hasMoreElements()) {
			// 从ZipFile中得到一个ZipEntry
			ze = (ZipEntry) zList.nextElement();
			if (ze.isDirectory()) {
				continue;
			}
			// 以ZipEntry为参数得到一个InputStream，并写到OutputStream中
			OutputStream os = new BufferedOutputStream(new FileOutputStream(
					getRealFileName(outFileName, ze.getName())));
			InputStream is = new BufferedInputStream(zfile.getInputStream(ze));
			int readLen = 0;
			while ((readLen = is.read(buf, 0, 1024)) != -1) {
				os.write(buf, 0, readLen);
			}
			is.close();
			os.close();
			System.out.println("Extracted: " + ze.getName());
		}
		zfile.close();

	}

	/**
	 * 取得指定目录下的所有文件列表，包括子目录.
	 * 
	 * @param baseDir
	 *            File 指定的目录
	 * @return 包含java.io.File的List
	 */
	private List getSubFiles(File baseDir) {
		List ret = new ArrayList();
		// File base=new File(baseDir);
		File[] tmp = baseDir.listFiles();
		for (int i = 0; i < tmp.length; i++) {
			if (tmp[i].isFile()) {
				ret.add(tmp[i]);
			}
			if (tmp[i].isDirectory()) {
				ret.addAll(getSubFiles(tmp[i]));
			}
		}
		return ret;
	}

	/**
	 * 给定根目录，返回一个相对路径所对应的实际文件名.
	 * 
	 * @param baseDir
	 *            指定根目录
	 * @param absFileName
	 *            相对路径名，来自于ZipEntry中的name
	 * @return java.io.File 实际的文件
	 */
	private File getRealFileName(String baseDir, String absFileName) {
		String[] dirs = absFileName.split("/");
		// System.out.println(dirs.length);
		File ret = new File(baseDir);
		// System.out.println(ret);
		if (dirs.length > 1) {
			for (int i = 0; i < dirs.length - 1; i++) {
				ret = new File(ret, dirs[i]);
			}
		}
		if (!ret.exists()) {
			ret.mkdirs();
		}
		ret = new File(ret, dirs[dirs.length - 1]);
		return ret;
	}

	/**
	 * 给定根目录，返回另一个文件名的相对路径，用于zip文件中的路径.
	 * 
	 * @param baseDir
	 *            java.lang.String 根目录
	 * @param realFileName
	 *            java.io.File 实际的文件名
	 * @return 相对文件名
	 */
	private String getAbsFileName(String baseDir, File realFileName) {
		File real = realFileName;
		File base = new File(baseDir);
		String ret = real.getName();
		while (true) {
			real = real.getParentFile();
			if (real == null)
				break;
			if (real.equals(base))
				break;
			else {
				ret = real.getName() + "/" + ret;
			}
		}
		System.out.println("TTTTT" + ret);
		return ret;
	}

	public void testReadZip() throws Exception {
		String baseDir = "d:\\temp\\zipout";
		ZipFile zfile = new ZipFile("d:\\download\\src.zip");
		System.out.println(zfile.getName());
		Enumeration zList = zfile.entries();
		ZipEntry ze = null;
		byte[] buf = new byte[1024];
		while (zList.hasMoreElements()) {
			// 从ZipFile中得到一个ZipEntry
			ze = (ZipEntry) zList.nextElement();
			if (ze.isDirectory()) {
				continue;
			}
			// 以ZipEntry为参数得到一个InputStream，并写到OutputStream中
			OutputStream os = new BufferedOutputStream(new FileOutputStream(
					getRealFileName(baseDir, ze.getName())));
			InputStream is = new BufferedInputStream(zfile.getInputStream(ze));
			int readLen = 0;
			while ((readLen = is.read(buf, 0, 1024)) != -1) {
				os.write(buf, 0, readLen);
			}
			is.close();
			os.close();
			System.out.println("Extracted: " + ze.getName());
		}
		zfile.close();
	}

	public static void main(String args[]) {
		ZipManager manager = new ZipManager();
		long l = 0;
		try {
//			manager.createZip("E:\\Test Zip", "E:\\Test Zip.rar");
			manager.releaseZipToFile("E:\\Test Zip.rar", "E:\\Test");
		} catch (Exception e) {
		}
		System.out.println("Result=" + l);
	}

}