如何使用Content-Encoding读取压缩的HTML页面:gzip

Question

我请求一个发送Content-Encoding:gzip标头的网页,但却被卡住了怎么读它..

我的代码:

    try {
        URLConnection connection = new URL("http://jquery.org").openConnection();                        
        String html = "";
        BufferedReader in = null;
        connection.setReadTimeout(10000);
    in = new BufferedReader(new InputStreamReader(connection.getInputStream()));            
    String inputLine;
    while ((inputLine = in.readLine()) != null){
    html+=inputLine+"\n";
        }
    in.close();
        System.out.println(html);
        System.exit(0);
    } catch (IOException ex) {
        Logger.getLogger(Crawler.class.getName()).log(Level.SEVERE, null, ex);
    }

输出看起来很乱.(我无法在这里粘贴它,一种符号......)

我相信这是一个压缩内容,如何解析呢？

注意:
如果我将jquery.org更改为jquery.com(不发送该标头,我的代码运行良好)

Answer 1

实际上,这是pb2q的答案,但我发布了未来读者的完整代码

try {
    URLConnection connection = new URL("http://jquery.org").openConnection();                        
    String html = "";
    BufferedReader in = null;
    connection.setReadTimeout(10000);
    //The changed part
    if (connection.getHeaderField("Content-Encoding")!=null && connection.getHeaderField("Content-Encoding").equals("gzip")){
        in = new BufferedReader(new InputStreamReader(new GZIPInputStream(connection.getInputStream())));            
    } else {
        in = new BufferedReader(new InputStreamReader(connection.getInputStream()));            
    }     
    //End        
    String inputLine;
    while ((inputLine = in.readLine()) != null){
    html+=inputLine+"\n";
    }
in.close();
    System.out.println(html);
    System.exit(0);
} catch (IOException ex) {
    Logger.getLogger(Crawler.class.getName()).log(Level.SEVERE, null, ex);
}

Answer 2

有一个类:GZIPInputStream.这是一个InputStream使用非常透明的.