zip文件解压或压缩

<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>