import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Decompressing {

	public static void main(String[] args) throws IOException {
		Charset gbk = Charset.forName("gbk");// 系统默认的编码格式为UTF_8，所以这里修改为GBK，否则会报Malformed异常
		ZipFile zipFile = new ZipFile(new File("E:\\Visio独立安装版.zip"), gbk);
		unZipFiles(zipFile, "E:\\");
	}

	public static void unZipFiles(ZipFile zip, String descDir) throws IOException {
		File pathFile = new File(descDir);
		if (!pathFile.exists()) {
			pathFile.mkdirs();
		}
		for (Enumeration entries = zip.entries(); entries.hasMoreElements();) {
			ZipEntry entry = (ZipEntry) entries.nextElement();
			String zipEntryName = entry.getName();
			InputStream in = zip.getInputStream(entry);
			String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
			// 判断路径是否存在,不存在则创建文件路径
			File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
			if (!file.exists()) {
				file.mkdirs();
			}
			// 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
			if (new File(outPath).isDirectory()) {
				continue;
			}
			// 输出文件路径信息
			System.out.println(outPath);

			OutputStream out = new FileOutputStream(outPath);
			byte[] buf1 = new byte[1024];
			int len;
			while ((len = in.read(buf1)) > 0) {
				out.write(buf1, 0, len);
			}
			in.close();
			out.close();
		}
		System.out.println("******************解压完毕********************");
	}
}