Question

我正在尝试使用以下代码将图像文件从资源文件夹复制到本地系统。

  InputStream inStream = null;
  OutputStream outStream = null;
  File bfile = new File(directoryPath + "/icons/" + outputFileName);
  inStream = MyClass.class.getClassLoader().getResourceAsStream("/images/" + imgFileName);
  try {

        outStream = new FileOutputStream(bfile);

        byte[] buffer = new byte[1024];

        int length;

        if (inStream != null && outStream != null) {
            // copy the file content in bytes
            while ((length = inStream.read(buffer)) > 0) {

                outStream.write(buffer, 0, length);

            }

            inStream.close();
            outStream.close();
        } 
        System.out.println("File is copied successful!");

    } catch (IOException e) {
        e.printStackTrace();
    }

当我运行eclipse时，这段代码非常正常。但是当我构建产品时，图标不会被复制到本地系统。

我也试过

inStream = MyClass.class.getResourceAsStream("/images/" + imgFileName);

但没有运气。

有任何想法！

Answer 1

要打开输入流，请考虑使用FileLocator API：

    FileInputStream is = null;
    FileOutputStream fo = null;
    FileChannel inputChannel = null;
    FileChannel outputChannel = null;
    File bfile = new File(directoryPath + "/icons/" + outputFileName);
    try {
        is = FileLocator.openStream(Activator.getDefault().getBundle(), new Path("/images/" + imgFileName), false);
        inputChannel = is.getChannel();
        fo = new FileOutputStream(bfile);
        outputChannel = fo.getChannel();
        outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
    } finally {
        // close everything in finally
    }

另请注意，最好关闭finally块

中的流和频道

getResourceAsStream（）不适用于构建的产品

1 个答案: