对文件进行打包或对zip包进行解包

import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.Enumeration;import java.util.List;import java.util.zip.CRC32;import org.apache.tools.zip.ZipFile;

import org.apache.log4j.Logger;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipOutputStream;import org.resbase.util.FileBean;import org.resbase.util.FileSecurity;

 

/** * 类名：ZipTool  <p> * 类描述：对文件进行打包或对zip包进行解包<p> * 编写者 ：luoc<p> * 编写日期 ：2005-10-3<p> * 主要public成员变量：<p> * 主要public方法：   <p> **/

public class ZipTool{ private static Logger log = Logger.getLogger(ZipTool.class);    /**    * 方法名称：zip<p>    * 方法功能：对指定路径srcPath进行打包，打成zip包放入zipPath中<p>    * 参数说明：@param zipPath 打包后的结果包    * 参数说明：@param srcPath 需要打包的文件夹    * 参数说明：@throws Exception <p>    * 返回：void <p>    * 作者：luoc    * 日期：2005-10-3    **/    public static void zip(String zipPath,String srcPath)    throws Exception    {  List fileList = getSubFiles(new File(srcPath));

  // 压缩文件名  ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(    zipPath));

  ZipEntry ze = null;  byte[] buf = new byte[1024];  int readLen = 0;  for (int i = 0; i < fileList.size(); i++) {   File f = (File) fileList.get(i);

   // 创建一个ZipEntry，并设置Name和其它的一些属性   ze = new ZipEntry(getAbsFileName(srcPath, f));   ze.setSize(f.length());   ze.setTime(f.lastModified());            // 设置CRC校验    ze.setCrc(0);         CRC32 crc = new CRC32();         crc.reset();            // 将ZipEntry加到zos中，再写入实际的文件内容   zos.putNextEntry(ze);   InputStream is = new BufferedInputStream(new FileInputStream(f));   while ((readLen = is.read(buf, 0, 1024)) != -1) {    zos.write(buf, 0, readLen);    crc.update(buf, 0, readLen);   }   ze.setCrc(crc.getValue());   is.close();  }  zos.close();    }        public static void zipDecode(String zipPath,String srcPath)除xml外所有文件都解密    throws Exception    {  List fileList = getSubFiles(new File(srcPath));

  // 压缩文件名  ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(    zipPath));

  ZipEntry ze = null;  boolean isXML=false;  byte[] buf = new byte[1024];  int readLen = 0;  for (int i = 0; i < fileList.size(); i++) {   File f = (File) fileList.get(i);   isXML=false;   // 创建一个ZipEntry，并设置Name和其它的一些属性   ze = new ZipEntry(getAbsFileName(srcPath, f));   ze.setSize(f.length());   ze.setTime(f.lastModified());            // 设置CRC校验    ze.setCrc(0);         CRC32 crc = new CRC32();         crc.reset();            // 将ZipEntry加到zos中，再写入实际的文件内容   zos.putNextEntry(ze);      if (FileBean.getFileExt(f.getName()).equalsIgnoreCase("xml"))    isXML=true;   InputStream is = new BufferedInputStream(new FileInputStream(f));   int j=0;   while ((readLen = is.read(buf, 0, 1024)) != -1) {    if (!isXML){     if (j==0){      buf=FileSecurity.EncodeBuff(buf);     }    }    zos.write(buf, 0, readLen);    crc.update(buf, 0, readLen);    j++;   }   ze.setCrc(crc.getValue());   is.close();  }  zos.close();    }       public static void zipDecode(String zipPath,String srcPath,String filePath)//除filePath外所有文件都不加密    throws Exception    {  List fileList = getSubFiles(new File(srcPath));

  // 压缩文件名  ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(    zipPath));

  ZipEntry ze = null;  boolean isXML=false;  byte[] buf = new byte[1024];  int readLen = 0;  for (int i = 0; i < fileList.size(); i++) {   File f = (File) fileList.get(i);   isXML=true;   // 创建一个ZipEntry，并设置Name和其它的一些属性   ze = new ZipEntry(getAbsFileName(srcPath, f));   ze.setSize(f.length());   ze.setTime(f.lastModified());            // 设置CRC校验    ze.setCrc(0);         CRC32 crc = new CRC32();         crc.reset();            // 将ZipEntry加到zos中，再写入实际的文件内容   zos.putNextEntry(ze);

   if ((f.getPath()).equalsIgnoreCase(filePath))    isXML=false;   InputStream is = new BufferedInputStream(new FileInputStream(f));   int j=0;   while ((readLen = is.read(buf, 0, 1024)) != -1) {    if (!isXML){     if (j==0){      buf=FileSecurity.EncodeBuff(buf);     }    }    zos.write(buf, 0, readLen);    crc.update(buf, 0, readLen);    j++;   }   ze.setCrc(crc.getValue());   is.close();  }  zos.close();    }        /**    * 方法名称：unzip<p>    * 方法功能：对指定的zip文件进行解包<p>    * 参数说明：@param desPath 解包到文件夹    * 参数说明：@param args 要进行解包的zip文件<p>    * 返回：void <p>    * 作者：luoc    * 日期：2005-10-3    **/    public static String unzip(String desPath,String args)    {                if (!(new File(args)).exists())        {         log.debug("解压失败：文件没有找到！！");            return "解压失败：文件没有找到！！";        }        try        {        ZipFile zfile = new ZipFile(args);

  Enumeration zList = zfile.getEntries();  byte[] buf = new byte[16384];  while (zList.hasMoreElements()) {   // 从ZipFile中得到一个ZipEntry   ZipEntry ze = (ZipEntry) zList.nextElement();   if (ze.isDirectory()) {    log.debug("Dir: " + ze.getName() + " skipped..");    continue;   }   log.debug("Extracting: " + ze.getName() + "/t"     + ze.getSize() + "/t" + ze.getCompressedSize());

   // 以ZipEntry为参数得到一个InputStream，并写到OutputStream中   OutputStream os = new BufferedOutputStream(new FileOutputStream(     getRealFileName(desPath, ze.getName())));   InputStream is = new BufferedInputStream(zfile.getInputStream(ze));   int readLen = 0;   while ((readLen = is.read(buf, 0, 1024)) != -1) {    os.write(buf, 0, readLen);   }   is.close();   os.close();   log.debug("Extracted: " + ze.getName());  }        }catch (Exception e)         {          e.printStackTrace();          return "解压失败："+e.getMessage();         }         return "";    }     /**  * 给定根目录，返回一个相对路径所对应的实际文件名.  *   * @param baseDir  *            指定根目录  * @param absFileName  *            相对路径名，来自于ZipEntry中的name  * @return java.io.File 实际的文件  */    public static File getRealFileName(String baseDir, String absFileName) {  String[] dirs = absFileName.split("/");   //Regexp.split("/", absFileName);  // System.out.println(dirs.length);  File ret = new File(baseDir);  if (dirs.length > 1) {   for (int i = 0; i < dirs.length - 1; i++) {    ret = new File(ret, dirs[i]);   }  }  if (!ret.exists()) {   ret.mkdirs();  }  ret = new File(ret, dirs[dirs.length - 1]);  return ret; }

 /**  * 给定根目录，返回另一个文件名的相对路径，用于zip文件中的路径.  *   * @param baseDir  *            java.lang.String 根目录  * @param realFileName  *            java.io.File 实际的文件名  * @return 相对文件名  */    public static String getAbsFileName(String baseDir, File realFileName) {  File real = realFileName;  File base = new File(baseDir);  String ret = real.getName();  while (true) {   real = real.getParentFile();   if (real == null)    break;   if (real.equals(base))    break;   else {    ret = real.getName() + "/" + ret;   }  }  return ret; }

 /**  * 取得指定目录下的所有文件列表，包括子目录.  *   * @param baseDir  *            File 指定的目录  * @return 包含java.io.File的List  */    public static List getSubFiles(File baseDir) {  List ret = new ArrayList();  // File base=new File(baseDir);  if (baseDir.isDirectory()){   File[] tmp = baseDir.listFiles();   for (int i = 0; i < tmp.length; i++) {    if (tmp[i].isFile()) {     ret.add(tmp[i]);    }    if (tmp[i].isDirectory()) {     ret.addAll(getSubFiles(tmp[i]));    }   }  }else{   ret.add(baseDir);  }  return ret; }     public static void main(String[] args) {  try {   zip("c://李海青.zip", "c://李海青.xls");  } catch (Exception e) {     } // end try }}