这是在java中下载文件的最佳方式吗？ [英] Is this the best way to download a file in java?

问题描述

public void download(String url, String destination) {
        BufferedOutputStream localBufferedOutputStream = null;
        URLConnection localURLConnection = null;
        InputStream localInputStream = null;
        try {
            URL localURL = new URL(url);

            localBufferedOutputStream = new BufferedOutputStream(new FileOutputStream(destination));
            localURLConnection = localURL.openConnection();
            localInputStream = localURLConnection.getInputStream();

            byte[] arrayOfByte = new byte[1024];
            int i;
            while ((i = localInputStream.read(arrayOfByte)) != -1) {
                localBufferedOutputStream.write(arrayOfByte, 0, i);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                if (localInputStream != null) {
                    localInputStream.close();
                }
                if (localBufferedOutputStream != null) {
                    localBufferedOutputStream.close();
                }
            } catch (IOException localIOException3) {
                System.out.println(localIOException3);
            }
        }
    }

我在调试我的应用程序看起来有点慢。我想知道这是否是我的互联网。这是在java中下载文件的正确方法吗？该文件是26mb。

I'm debugging my application and it seems a bit slow. I'm wondering if it's my internet. Is this the proper way to download a file in java? The file is 26mb.

推荐答案

您应该始终关注像Apache这样的库。他们为你做了所有辛苦的工作：
http://commons.apache.org/io/api-release/org/apache/commons/io/FileUtils.html

You should always look to libraries such as Apache. They have done all the hard work for you: http://commons.apache.org/io/api-release/org/apache/commons/io/FileUtils.html

我使用

static String   readFileToString(File file)
          Reads the contents of a file into a String using the default encoding for the VM.

相当多。

如果你知道你有一个URL（如此流）看：
http://commons.apache.org/io/api-1.4/org/apache/commons/io/IOUtils.html

If you know you have a URL (and so stream) look at: http://commons.apache.org/io/api-1.4/org/apache/commons/io/IOUtils.html

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