实现的功能是对一个文件进行压缩处理，只需要改动一个 zipFile("D:\\test\\云云 想不开.wps", "D:\\test\\云云 想不开.wps.zip"); 这句话就行了 很简单

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;



/**
 * @description 压缩文件
 * @author SHOUSHEN LUAN
 * @DATE 2012-1-8下午03:10:01
 */
public class GZipUtils {
 public static void main(String[] args) throws IOException {
  zipFile("D:\\test\\云云 想不开.wps", "D:\\test\\云云 想不开.wps.zip");

  
 }

 /**
  * Member cache 文件解压处理
  * 
  * @param buf
  * @return
  * @throws IOException
  */
 public static byte[] unGzip(byte[] buf) throws IOException {
  GZIPInputStream gzi = null;
  ByteArrayOutputStream bos = null;
  try {
   gzi = new GZIPInputStream(new ByteArrayInputStream(buf));
   bos = new ByteArrayOutputStream(buf.length);
   int count = 0;
   byte[] tmp = new byte[2048];
   while ((count = gzi.read(tmp)) != -1) {
    bos.write(tmp, 0, count);
   }
   buf = bos.toByteArray();
  } finally {
   if (bos != null) {
    bos.flush();
    bos.close();
   }
   if (gzi != null)
    gzi.close();
  }
  return buf;
 }

 /**
  * Member cache 文件压缩处理
  * 
  * @param val
  * @return
  * @throws IOException
  */
 public static byte[] gzip(byte[] val) throws IOException {
  ByteArrayOutputStream bos = new ByteArrayOutputStream(val.length);
  GZIPOutputStream gos = null;
  try {
   gos = new GZIPOutputStream(bos);
   gos.write(val, 0, val.length);
   gos.finish();
   gos.flush();
   bos.flush();
   val = bos.toByteArray();
  } finally {
   if (gos != null)
    gos.close();
   if (bos != null)
    bos.close();
  }
  return val;
 }

 /**
  * 对文件进行压缩
  * 
  * @param source
  *            源文件
  * @param target
  *            目标文件
  * @throws IOException
  */
 public static void zipFile(String source, String target) throws IOException {
  FileInputStream fin = null;
  FileOutputStream fout = null;
  GZIPOutputStream gzout = null;
  try {
   fin = new FileInputStream(source);
   fout = new FileOutputStream(target);
   gzout = new GZIPOutputStream(fout);
   byte[] buf = new byte[1024];
   int num;
   while ((num = fin.read(buf)) != -1) {
    gzout.write(buf, 0, num);
   }
  } finally {
   if (gzout != null)
    gzout.close();
   if (fout != null)
    fout.close();
   if (fin != null)
    fin.close();
  }
 }

 /**
  * 解压文件
  * 
  * @param source源文件
  * @param target目标文件
  * @throws IOException
  */
 public static void unZipFile(String source, String target)
   throws IOException {
  FileInputStream fin = null;
  GZIPInputStream gzin = null;
  FileOutputStream fout = null;
  try {
   fin = new FileInputStream(source);
   gzin = new GZIPInputStream(fin);
   fout = new FileOutputStream(target);
   byte[] buf = new byte[1024];
   int num;
   while ((num = gzin.read(buf, 0, buf.length)) != -1) {
    fout.write(buf, 0, num);
   }
  } finally {
   if (fout != null)
    fout.close();
   if (gzin != null)
    gzin.close();
   if (fin != null)
    fin.close();
  }
 }
}