java实现的文件压缩和解压

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java实现的文件压缩和解压
package com.cn;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.Enumeration;import java.util.zip.ZipEntry;import java.util.zip.ZipException;import java.util.zip.ZipFile;import java.util.zip.ZipOutputStream;/** * @author  * */public class ZipUtil { /**      * 缓冲大小      */      private static int BUFFERSIZE = 2 << 10;            /**      * 压缩      * @param paths      * @param fileName      */      public static void zip(String[] paths, String fileName)      {                    ZipOutputStream zos = null;          try          {              zos = new ZipOutputStream(new FileOutputStream(fileName));              for(String filePath : paths)              {                  //递归压缩文件                  File file = new File(filePath);                  String relativePath = file.getName();                  if(file.isDirectory())                  {                      relativePath += File.separator;                  }                  zipFile(file, relativePath, zos);              }          }          catch (IOException e)          {              e.printStackTrace();          }          finally          {              try              {                  if(zos != null)                  {                      zos.close();                  }              }              catch (IOException e)              {                  e.printStackTrace();              }          }      }            public static void zipFile(File file, String relativePath, ZipOutputStream zos)      {          InputStream is = null;          try          {              if(!file.isDirectory())              {                  ZipEntry zp = new ZipEntry(relativePath);                  zos.putNextEntry(zp);                  is = new FileInputStream(file);                  byte[] buffer = new byte[BUFFERSIZE];                  int length = 0;                  while ((length = is.read(buffer)) >= 0)                  {                      zos.write(buffer, 0, length);                  }                  zos.flush();                  zos.closeEntry();              }              else              {                  for(File f: file.listFiles())                  {                      zipFile(f, relativePath + f.getName() + File.separator, zos);                  }              }          }          catch (IOException e)          {              e.printStackTrace();          }          finally          {              try              {                  if(is != null)                  {                      is.close();                  }              }              catch (IOException e)              {                  e.printStackTrace();              }          }      }            /**      * 解压缩      * @param fileName      * @param path      */      public static void unzip(String fileName, String path)      {          FileOutputStream fos = null;          InputStream is = null;          try          {              ZipFile zf = new ZipFile(new File(fileName));              Enumeration en = zf.entries();              while (en.hasMoreElements())              {                  ZipEntry zn = (ZipEntry) en.nextElement();                  if (!zn.isDirectory())                  {                      is = zf.getInputStream(zn);                      File f = new File(path + zn.getName());                      File file = f.getParentFile();                      file.mkdirs();                      fos = new FileOutputStream(path + zn.getName());                      int len = 0;                      byte bufer[] = new byte[BUFFERSIZE];                      while (-1 != (len = is.read(bufer)))                      {                          fos.write(bufer, 0, len);                      }                      fos.close();                  }              }          }          catch (ZipException e)          {              e.printStackTrace();          }          catch (IOException e)          {              e.printStackTrace();          }          finally          {              try              {                  if(null != is)                  {                      is.close();                  }                  if(null != fos)                  {                      fos.close();                  }              }              catch (IOException e)              {                  e.printStackTrace();              }          }      }            /**      * @param args      */      public static void main(String[] args)      {          zip(new String[] {"D:/Development/work/javaProject/src/com/cn/ZipUtil.java"}, "D:/Development/test.zip");          unzip("D:/Development/test.zip", "D:/Development/test/");      }  }
原作者：http://songfeng-123.iteye.com/blog/2243016
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