compress.java

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package cn.js.fan.util.file;

import java.io.*;
import java.util.zip.*;
import cn.js.fan.util.*;

public class Compress {
  public static void gzipFile(String from, String to) throws IOException {
    FileInputStream in = new FileInputStream(from);
    ZipEntry entry = new ZipEntry(from);
    ZipOutputStream out = new ZipOutputStream(new FileOutputStream(to));
    out.putNextEntry(entry);
    byte[] buffer = new byte[4096];
    int bytes_read;
    while ( (bytes_read = in.read(buffer)) != -1)
      out.write(buffer, 0, bytes_read);
    in.close();
    out.close();
  }

  public static void zipDirectory(String dir, String zipfile) throws
      IOException, IllegalArgumentException {
    ZipOutputStream out =
        new ZipOutputStream(new FileOutputStream(zipfile));
    zipDir(out, dir);
    out.close();
  }

  public static void zipDir(ZipOutputStream out, String dir) throws IOException,
      IllegalArgumentException {
    File d = new File(dir);
    if (!d.isDirectory()) {
      byte[] buffer = new byte[4096];
      int bytes_read;
      FileInputStream in = new FileInputStream(d);
      ZipEntry entry = new ZipEntry(StrUtil.GBToUnicode(dir));
      out.putNextEntry(entry);
      while ( (bytes_read = in.read(buffer)) != -1)
        out.write(buffer, 0, bytes_read);
      
      in.close();
      return;
    }

    
    String[] entries = d.list();
    String path = d.getPath();
    for (int i = 0; i < entries.length; i++) {
      zipDir(out, path + "/" + entries[i]);
    }
  }

}