Question

我的Java应用程序存在问题，它会下载并提取文件。

以下是代码：

private void downloadFile(String link) throws MalformedURLException, IOException{
        URL url = new URL(link);
        URLConnection conn = url.openConnection();
        InputStream is = conn.getInputStream();
        long max = conn.getContentLength();
        ActivityOutput.setText(ActivityOutput.getText()+"\nUpdate size(compressed): "+max+" bytes");
        BufferedOutputStream fOut = new BufferedOutputStream(new FileOutputStream(new File(getCWDir()+"\\update.zip")));
        byte[] buffer = new byte[32768];
        int bytesRead = 0;
        int in = 0;
        while((bytesRead = is.read(buffer)) != -1){
            in += bytesRead;
            fOut.write(buffer, 0, bytesRead);
        }
        fOut.flush();
        fOut.close();
        is.close();
        ActivityOutput.setText(ActivityOutput.getText()+"\nDownload Compete!");
    }

    private void unzip() throws IOException{
        File tempLoc = new File(getCWDir()+"\\update");
        if(!tempLoc.exists()){
            tempLoc.mkdir();
        }
        int BUFFER = 2048;
        BufferedOutputStream dest = null;
        BufferedInputStream is = null;
        ZipFile zipfile = new ZipFile(getCWDir()+"\\update.zip");
        Enumeration e = zipfile.entries();
        new File(getCWDir()+"\\update\\").mkdir();
        while(e.hasMoreElements()){
            ZipEntry entry = (ZipEntry)e.nextElement();
            ActivityOutput.setText(ActivityOutput.getText()+"\nExtracting: "+entry);
            if(entry.isDirectory()){
                new File(getCWDir()+"\\update\\"+entry.getName()).mkdir();
            } else {
                new File(getCWDir()+"\\update\\"+entry.getName()).createNewFile();
                is = new BufferedInputStream(zipfile.getInputStream(entry));
                byte[] data = new byte[BUFFER];
                FileOutputStream fos = new FileOutputStream(getCWDir()+"\\update\\"+entry.getName());
                dest = new BufferedOutputStream(fos, BUFFER);
                int count;
                while((count = is.read(data, 0, BUFFER)) != -1){
                    dest.write(data, 0, count);
                }
                dest.flush();
                dest.close();
                is.close();
            }
        }
    }

事情是在此之后我想删除文件，但它们仍在使用中，我无法执行删除功能。我无法找到问题。我可以帮忙解决这个问题吗？

Answer 1

我认为你应该在日常工作结束时关闭你的zipFile：

zipFile.close();

Answer 2

谢谢Rambler！关闭zipfile后问题解决了。

            dest.close();
            is.close();
        } 
    }
    zipfile.close();
}

下载和解压缩过程仍在运行

2 个答案: