JSP上面實現目錄壓縮

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上載者:User

  zip方法 zipPath參數為儲存zip的檔案路徑 srcPath參數為需要壓縮的目錄 在linux window上面測試無問題!主要是編碼問題比較麻煩~要是有其他異常 請留言 或者 有什麼更好的方法 歡迎給更多的意見

  //zip zhe folder

  void zip(String zipPath, String srcPath,javax.servlet.jsp.JspWriter out) throws Exception {

  FileOutputStream output = null;

  ZipOutputStream zipOutput = null;

  try{

  output = new FileOutputStream(zipPath);

  zipOutput = new ZipOutputStream(output);

  zipEntry(zipOutput,srcPath,srcPath,zipPath);

  }catch(Exception e){

  out.print("file zip error");

  }finally{

  if(zipOutput!=null)zipOutput.close();

  }

  out.print("zip ok"+zipPath);

  }

  //add the zip entry

  void zipEntry(ZipOutputStream zipOs, String initPath,String filePath,String zipPath) throws Exception {

  String entryName = filePath;

  File f = new File(filePath);

  if (f.isDirectory()){// ??

  String[] files = f.list();

  for(int i = 0; i < files.length; i++)

  zipEntry(zipOs, initPath, filePath + File.separator + files[i],zipPath);

  return;

  }

  String chPh = initPath.substring(initPath.lastIndexOf("/") + 1);// ?????

  int idx=initPath.lastIndexOf(chPh);

  if (idx != -1) {

  entryName = filePath.substring(idx);

  }

  ZipEntry entry;

  entry = new ZipEntry(entryName);

  File ff = new File(filePath);

  if(ff.getAbsolutePath().equals(zipPath))return;

  entry.setSize(ff.length());

  entry.setTime(ff.lastModified());

  //the CRC efficacy

  entry.setCrc(0);

  CRC32 crc = new CRC32();

  crc.reset();

  zipOs.putNextEntry(entry);

  int len = 0;

  byte[] buffer = new byte[2048];

  int bufferLen = 2048;

  FileInputStream input =null;

  try{

  input = new FileInputStream(filePath);

  while ((len = input.read(buffer, 0, bufferLen)) != -1) {

  zipOs.write(buffer, 0, len);

  crc.update(buffer, 0, len);

  }

  }catch(Exception e){

  }finally{

  if(input!=null)input.close();

  }

  entry.setCrc(crc.getValue());

  }

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