java urlconnection不抛出sockettimeoutexception

Question

我经常遇到java after连接，即使使用setReadTimeOut()，它也不会在应该抛出sockettimeoutexception异常时抛出，而且它始终与最终(挂起2-3分钟后)过早的EOF异常相关联。我在一些博客上看到，这可能与使用BufferedReader的readLine方法读取有关，String x= ""；while((x=bufferedReader.readLine())!=null){}

如果在输入流的结尾处没有换行符，则在文件结尾处。这是不合理的，为什么java的setTimeOut不能正确运行？

       URL url=new URL("");
      c=(HttpURLConnection)url.openConnection();
      c.setReadTimeout(17000);
      BufferedReader b = new BufferedReader(new InputStreamReader(c.getInputStream()));
      String s;

      while((s=b.readLine())!=null)
      {     
          } ect.






    java.io.IOException: Premature EOF
at sun.net.www.http.ChunkedInputStream.readAheadBlocking(Unknown Source)
at sun.net.www.http.ChunkedInputStream.readAhead(Unknown Source)
at sun.net.www.http.ChunkedInputStream.read(Unknown Source)
at java.io.FilterInputStream.read(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(Unknown Source)
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at java.io.BufferedReader.fill(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)

以下是响应头部(截断了确切的cookie信息)：

     [HTTP/1.1 200 OK]
     p3p ["",""]
     x-frame-options [SAMEORIGIN]
     Date [Tue, 08 May 2012 15:01:40 GMT]
     Vary [Accept-Encoding,User-Agent]
     Transfer-Encoding [chunked]
     Set-cookie [""=""; path=/; domain=""; expires=Tue, 01-Jan-2036 08:00:01 GMT]
     Content-Type [text/html; charset=ISO-8859-1]
     Server [Server]

Answer 1

请参阅setReadTimeout的文档

Some non-standard implementation of this method ignores the specified timeout.

如果您认为这不是问题所在，请将超时设置为一个非常低的数字，如1，然后进行检查。您应该会得到一个java.net.SocketTimeoutException异常。