从URLConnection读取二进制文件 [英] Reading binary file from URLConnection

问题描述

我正在尝试从URLConnection中读取一个二进制文件。当我用文本文件测试它似乎工作正常，但二进制文件，它没有。当文件发送时，我在服务器上使用以下mime类型：

I'm trying to read a binary file from a URLConnection. When I test it with a text file it seems to work fine but for binary files it doesn't. I'm using the following mime-type on the server when the file is send out:

application/octet-stream

但到目前为止，似乎没有任何工作。这是我用来接收文件的代码：

But so far nothing seems to work. This is the code that I use to receive the file:

file = File.createTempFile( "tempfile", ".bin");
file.deleteOnExit();

URL url = new URL( "http://somedomain.com/image.gif" );

URLConnection connection = url.openConnection();

BufferedReader input = new BufferedReader( new InputStreamReader( connection.getInputStream() ) );

Writer writer = new OutputStreamWriter( new FileOutputStream( file ) );

int c;

while( ( c = input.read() ) != -1 ) {

   writer.write( (char)c );
}

writer.close();

input.close();

推荐答案

这是我做的，

input = connection.getInputStream();
byte[] buffer = new byte[4096];
int n;

OutputStream output = new FileOutputStream( file );
while ((n = input.read(buffer)) != -1) 
{
    output.write(buffer, 0, n);
}
output.close();

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