解压缩引发异常，提示FileNotFound

Question

我试图用Java将Windows计算机上的文件解压缩。当我从main（）方法调用unZip（）方法时，它工作正常，但是当我将此代码部署到服务器时，它抛出异常，提示FileNotFoundException（系统找不到指定的路径）。谁能帮助我。

public static void unZip(String zipFilePath, String destDirectory) {
        File destDir = new File(destDirectory);
        if (!destDir.exists()) {
            destDir.mkdir();
        }
        ZipInputStream zipIn=null;
        try {
            zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
            ZipEntry entry = zipIn.getNextEntry();

            while (entry != null) {
                String filePath = destDirectory + File.separator + entry.getName();
                if (!entry.isDirectory()) {

                    extractFile(zipIn, filePath);
                } else {

                    File dir = new File(filePath);
                    dir.mkdir();
                }
                zipIn.closeEntry();
                entry = zipIn.getNextEntry();
            }
            zipIn.close();
        } catch (Exception e) {
            System.out.println("exception occurred while Unzipping "+e);
        }finally{
            try{
                if(zipIn!=null){
                    zipIn.close();
                }
            }catch(IOException ioe){
                System.out.println("exception occureed while closing the stream"+ioe);
            }
        }
    }

    private static void extractFile(ZipInputStream zipIn, String filePath) {
        BufferedOutputStream bos=null;
        FileOutputStream fos=null;
        try {
            if(filePath.contains("/")){
                filePath = filePath.replace("/", "\\");
            }
            fos=new FileOutputStream(filePath);
            bos = new BufferedOutputStream(fos);

            byte[] bytesIn = new byte[BUFFER_SIZE];
            int read = 0;
            while ((read = zipIn.read(bytesIn)) != -1) {
                bos.write(bytesIn, 0, read);
            }
            bos.close();
        } catch (Exception e) {
            System.out.println("exception occurred while extracting"+e);
        }finally{
            try{
                if(fos!=null){
                    fos.close();
                }
                if(bos!=null){
                    bos.close();
                }
            }catch(IOException ioe){
                System.out.println("exception occureed while closing the stream"+ioe);
            }
        }
    }

注意：在两种情况下我都使用相对路径。