java解压缩文件

import java.io.*;
import java.util.*;
import java.util.zip.*;
public class Unzip {
  public static void main(String[] args) {
    String unzipfile = "d:\\test\\test.zip"; //解压缩的文件名
    try {
      File olddirec = new File(unzipfile); //解压缩的文件路径(为了获取路径)
      ZipInputStream zin = new ZipInputStream(new FileInputStream(unzipfile));
      ZipEntry entry;
      //创建文件夹
      while ( (entry = zin.getNextEntry()) != null){
        if (entry.isDirectory()) {
          File directory = new File(olddirec.getParent(), entry.getName());
          if (!directory.exists())
            if (!directory.mkdirs())
              System.exit(0);
          zin.closeEntry();
        }
        if (!entry.isDirectory()) {
          File myFile = new File(entry.getName());
          FileOutputStream fout = new FileOutputStream("d:\\test\\"+myFile.getPath());
          DataOutputStream dout = new DataOutputStream(fout);
          byte[] b = new byte[1024];
          int len = 0;
          while ( (len = zin.read(b)) != -1) {
            dout.write(b, 0, len);
          }
          dout.close();
          fout.close();
          zin.closeEntry();
        }
      }
    }
    catch (IOException e) {
      e.printStackTrace();
      System.out.println(e);
    }
  }
}