阅读网页的时候我经常遇到“早产EOF”异常。
以下是堆栈跟踪
java.io.IOException: Premature EOF
at sun.net.www.http.ChunkedInputStream.readAheadBlocking(ChunkedInputStream.java:556)
at sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:600)
at sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:687)
at java.io.FilterInputStream.read(FilterInputStream.java:133)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:2968)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at java.io.BufferedReader.fill(BufferedReader.java:154)
at java.io.BufferedReader.readLine(BufferedReader.java:317)
at java.io.BufferedReader.readLine(BufferedReader.java:382)
at Utilities.getPage(Utilities.java:24) while ((line = rd.readLine()) != null) {
at TalkPage.<init>(TalkPage.java:15)
at Updater.run(Updater.java:65)
以下是GETPAGE()方法
public static String getPage(String urlString) throws Exception {
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuffer sb = new StringBuffer();
String line;
while ((line = rd.readLine()) != null) { // LINE 24
sb.append(line);
}
return sb.toString();
}
什么是permature EOFException类,为什么它在这种特殊情况下存在的和它如何避免?
其他一些信息:在页面读取的大小约为20 KB,我在我的程序读很多这样的网页(20000左右)