java压缩文件util

package cn.ipanel.apps.portalBackOffice.util;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.util.Enumeration;import java.util.zip.CRC32;import java.util.zip.CheckedOutputStream;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;/** * * @create 2009-7-25 下午06:17:33 * @since */public class ZipUtil {public static final String FILE_SEPARATOR = System.getProperty("file.separator");/** * 将指定的文件解压缩到指定的文件夹，解压后的文件夹目录和给定的压缩文件名相同. *  * @param zipFilePath *            全路径 * @param unZipDirectory *            全路径 * @return 解压缩文件是否成功. * @throws IOException */public static boolean unZipFile(String zipFilePath, String unZipDirectory)throws IOException {ZipFile zipFile = new ZipFile(zipFilePath);Enumeration<?> entries = zipFile.getEntries();if (zipFile == null) {return false;}while (entries.hasMoreElements()) {ZipEntry zipEntry = (ZipEntry) entries.nextElement();File f = new File(unZipDirectory + FILE_SEPARATOR+ zipEntry.getName());if (zipEntry.isDirectory()) {if (!f.exists() && !f.mkdirs())throw new IOException("Couldn't create directory: " + f);} else {BufferedInputStream is = null;BufferedOutputStream os = null;try {is = new BufferedInputStream(zipFile.getInputStream(zipEntry));File destDir = f.getParentFile();if (!destDir.exists() && !destDir.mkdirs()) {throw new IOException("Couldn't create dir " + destDir);}os = new BufferedOutputStream(new FileOutputStream(f));int b = -1;while ((b = is.read()) != -1) {os.write(b);}} finally {if (is != null)is.close();if (os != null)os.close();}}}zipFile.close();return true;}/** *  压缩一个文件 * @param filePath * @param zipPath * @return */public static boolean zipFile(String filePath,String zipPath){    BufferedReader in=null;    org.apache.tools.zip.ZipOutputStream out=null;   try{File file=new File(filePath);             in=new BufferedReader(new InputStreamReader(new FileInputStream(filePath),"ISO-8859-1"));             FileOutputStream f=new FileOutputStream(zipPath);             CheckedOutputStream ch=new CheckedOutputStream(f,new CRC32());             out=new org.apache.tools.zip.ZipOutputStream(new BufferedOutputStream(ch));                  int c;            out.putNextEntry(new org.apache.tools.zip.ZipEntry(file.getName()));            while((c=in.read())!=-1)                out.write(c);                          }          catch(Exception e){             e.printStackTrace();             return false;            }         finally{         try { if(in!=null) in.close();       if(out!=null)  out.close();} catch (IOException e) {e.printStackTrace();}                     }         return true;}/** * 压缩一个目录 * @param dir * @param zipPath * @return */public static boolean zipDirectory(String dir,String zipPath ){org.apache.tools.zip.ZipOutputStream out=null;   try{File dirFile=new File(dir);if(!dirFile.isDirectory())return false;FileOutputStream fo=new FileOutputStream(zipPath);            CheckedOutputStream ch=new CheckedOutputStream(fo,new CRC32());            out=new org.apache.tools.zip.ZipOutputStream(new BufferedOutputStream(ch));            zip(out,dirFile,"");            }                     catch(Exception e){             e.printStackTrace();             return false;            }         finally{         try {       if(out!=null)  out.close(); } catch (IOException e) {e.printStackTrace();}                     }         return true;}public static void zip(org.apache.tools.zip.ZipOutputStream out,File f,String base)throws Exception{//System.out.println("Zipping  "+f.getName());if (f.isDirectory()) {File[] fl=f.listFiles();out.putNextEntry(new org.apache.tools.zip.ZipEntry(base+"/"));base=base.length()==0?"":base+"/";for (int i=0;i<fl.length ;i++ ){zip(out,fl[i],base+fl[i].getName());}}else {out.putNextEntry(new org.apache.tools.zip.ZipEntry(base));FileInputStream is=new FileInputStream(f);BufferedInputStream in = new BufferedInputStream(is);//修改BUG!二进制输出采用bufferedint b;while ((b=in.read()) != -1)out.write(b);in.close();}} public static void main(String[] args){       //  boolean f=zipFile("e:/red100.txt","e:/red.zip");         //boolean f=zipDirectory("e:/red","e:/red2.zip"); try {unZipFile("D:\\portal_rtb.zip", "D:\\wzb");//zipDirectory("F:\\list","F:\\list.zip");} catch (Exception e) {e.printStackTrace();}          }    }