zip文件解压或压缩

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    <span style="font-size:18px;">/**
     * lsz
     */ 
    public final class ZipUtil { 
     
        /**
         * 解压zip文件
         * @param unZipfile
         * @param destFile
         */ 
        public static void unZip(String unZipfile, String destFile) { 
            FileOutputStream fileOut; 
            File file; 
            InputStream inputStream; 
            byte[]   buf = new byte[1024*4]; 
            try { 
                //生成一个zip的文件 
                ZipFile   zipFile = new ZipFile(unZipfile, "GBK"); 
                //遍历zipFile中所有的实体，并把他们解压出来 
                for (@SuppressWarnings("unchecked") 
                Enumeration<ZipEntry> entries = zipFile.getEntries(); entries 
                        .hasMoreElements();) { 
                    ZipEntry entry =  entries.nextElement(); 
                    //生成他们解压后的一个文件   
                    file = new File(destFile+File.separator+entry.getName()); 
       
                    if (entry.isDirectory()) { 
                        file.mkdirs(); 
                    } else { 
                        // 如果指定文件的目录不存在,则创建之. 
                        File parent = file.getParentFile(); 
                        if (!parent.exists()) { 
                            parent.mkdirs(); 
                        }   
                        //获取出该压缩实体的输入流  
                        inputStream = zipFile.getInputStream(entry); 
       
                        fileOut = new FileOutputStream(file); 
                        int length = 0; 
                        //将实体写到本地文件中去 
                        while ((length = inputStream.read(buf)) > 0) { 
                            fileOut.write(buf, 0, length); 
                        } 
                        fileOut.close(); 
                        inputStream.close(); 
                    } 
                } 
                zipFile.close(); 
                //解压完后将原压缩文件删除 
                File zipfile = new File(unZipfile); 
                if(zipfile.exists()){ 
                    zipfile.delete(); 
                }    
            } catch (IOException ioe) { 
                ioe.printStackTrace(); 
            } 
        } 
         
     
          
        /**
         * 一个文件夹压缩
         * 压缩文件夹
         * @param filepath
         * @param savepath
         * @throws Exception
         */ 
          public static void toZip(String filepath,String savepath) throws Exception{ 
              File file = new File(filepath); 
              if(file.exists()){ 
                  //判断导出路径是否为空，如果为空，则将压缩包生成到当前路径下 
                  if(StringUtils.isBlank(savepath)){ 
                      savepath = filepath+".zip"; 
                  }else{ 
                      savepath = savepath+".zip"; 
                  } 
                  ZipOutputStream outPut = new ZipOutputStream(new FileOutputStream(new File(savepath)));   
                  outPut.setEncoding("GBK");//设置编码   
                  createZip(outPut,file.listFiles(),null);  
                  outPut.flush();   
                  outPut.close(); 
              }else{ 
                  //not found 
                  throw new RuntimeException("Err ：not found file exception："+filepath);   
              }      
          } 
           
          private static void createZip(org.apache.tools.zip.ZipOutputStream outPut,File[] listFiles,String fuPath) throws Exception {   
                for(File f : listFiles){   
                    String name = fuPath==null?f.getName():fuPath+"/"+f.getName();;   
                    if(f.isDirectory()){   
                        outPut.putNextEntry(new ZipEntry(name+"/"));   
                        createZip(outPut,f.listFiles(),name);   
                    }else{   
                        outPut.putNextEntry(new ZipEntry(name));   
                        InputStream is = new FileInputStream(f);   
                        byte[] bys = new byte[1024];   
                        int len = 0;   
                        while((len = is.read(bys))!=-1)   
                            outPut.write(bys, 0, len);   
                        is.close();   
                        outPut.flush();   
                    }   
                }   
            }  
           
          /*
           * 复制文件 只能使复制文件，不能复制文件夹
           */ 
          public static void fileChannelCopy(File fromfile, File tofile) { 
                FileInputStream fi = null; 
                FileOutputStream fo = null; 
                FileChannel in = null; 
                FileChannel out = null; 
                try { 
                    fi = new FileInputStream(fromfile); 
                    fo = new FileOutputStream(tofile); 
                    in = fi.getChannel();//得到对应的文件通道 
                    out = fo.getChannel();//得到对应的文件通道 
                    in.transferTo(0, in.size(), out);//连接两个通道，并且从in通道读取，然后写入out通道 
                } catch (IOException e) { 
                    e.printStackTrace(); 
                } finally { 
                    try { 
                        fi.close(); 
                        in.close(); 
                        fo.close(); 
                        out.close(); 
                    } catch (IOException e) { 
                        e.printStackTrace(); 
                    } 
                } 
            } 
    }</span>