java 解压缩ZIP文件方法

package com.highguard.file.common;

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.Enumeration;

import org.apache.tools.zip.ZipEntry;

import org.apache.tools.zip.ZipFile;

import org.apache.tools.zip.ZipOutputStream;

public class ZipUtils {

	public static void main(String[] args) {
		//压缩目录为zip
		 zip ("d:/temp/", "d:/temp/ym.zip");
		//解压缩zip文件到目录
		unZip("d:/temp/ym.zip", "d:/temp/zip");

		
	}


	public static void zip(String sourceDir, String zipFile) {


		try {
			ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile)));

			File file = new File(sourceDir);

			String basePath = null;

			if (file.isDirectory()) {

				basePath = file.getPath();

			} else {

				basePath = file.getParent();

			}

			zipFile(file, basePath, zos);

			zos.closeEntry();

			zos.close();

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

	}

	private static void zipFile(File source, String basePath,

	ZipOutputStream zos) {

		File[] files = new File[0];

		if (source.isDirectory()) {

			files = source.listFiles();

		} else {

			files = new File[1];

			files[0] = source;

		}

		String pathName;

		byte[] buf = new byte[1024];

		int length = 0;

		try {

			for (File file : files) {

				if (file.isDirectory()) {

					pathName = file.getPath().substring(basePath.length() + 1)

					+ "/";

					zos.putNextEntry(new ZipEntry(pathName));

					zipFile(file, basePath, zos);

				} else {

					pathName = file.getPath().substring(basePath.length() + 1);

					InputStream is = new FileInputStream(file);

					BufferedInputStream bis = new BufferedInputStream(is);

					zos.putNextEntry(new ZipEntry(pathName));

					while ((length = bis.read(buf)) > 0) {

						zos.write(buf, 0, length);

					}

					is.close();

				}

			}

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

	}


	public static void unZip(String zipfile, String destDir) {

		destDir = destDir.endsWith("\\") ? destDir : destDir + "\\";

		byte b[] = new byte[1024];

		int length;

		ZipFile zipFile;

		try {

			zipFile = new ZipFile(new File(zipfile));

			Enumeration enumeration = zipFile.getEntries();

			ZipEntry zipEntry = null;

			while (enumeration.hasMoreElements()) {

				zipEntry = (ZipEntry) enumeration.nextElement();

				File loadFile = new File(destDir + zipEntry.getName());

				if (zipEntry.isDirectory()) {

					// 这段都可以不要，因为每次都貌似从最底层开始遍历的

					loadFile.mkdirs();

				} else {

					if (!loadFile.getParentFile().exists())

						loadFile.getParentFile().mkdirs();

					OutputStream outputStream = new FileOutputStream(loadFile);

					InputStream inputStream = zipFile.getInputStream(zipEntry);

					while ((length = inputStream.read(b)) > 0)

						outputStream.write(b, 0, length);

				}

			}

			System.out.println(" 文件解压成功 ");

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

	}

}

 

评论

1 楼 woshixushigang 2011-03-13  

蛮有用的，顶起