Java Eclipse 中的 SaxParseException：XML 文档结构必须在同一实体内开始和结束
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SaxParseException in eclipse: XML document structures must start and end within the same entity
提问by HackCode
I am using the last.fm API for JAVA which can be foundhere.
我正在使用用于 JAVA 的 last.fm API，可以在此处找到。
I have a huge Datasetin which I am only using the file with user's artist history and plays. I have written a code in Java which extracts these artist names and returns the similar artists based on Artist.getSimilar()method.
我有一个巨大的数据集，其中我只使用包含用户艺术家历史和播放的文件。我用 Java 编写了一个代码，它提取这些艺术家姓名并根据Artist.getSimilar()方法返回相似的艺术家。
I ran it once but not for all the artists. I terminated the debugging half way through. However next time,my results were being returned from the cache and no longer was the request sent to the web-server. The problem is, this time I am getting results only till the artist where I had terminated the results. I tried using another method for the artists=Artist.getTopAlbums(), where I terminated mid way and faced the same problem next time. The error I am getting is:
我运行了一次，但不是为所有艺术家运行。我中途终止了调试。但是下一次，我的结果是从缓存中返回的，不再是将请求发送到网络服务器。问题是，这次我只得到结果，直到我终止结果的艺术家。我尝试对 使用另一种方法，在artists=Artist.getTopAlbums()那里我中途终止，下次遇到同样的问题。我得到的错误是：
[Fatal Error] :513:9: <strong>XML document structures must start and end within the same entity.</strong>
Exception in thread "main" de.umass.lastfm.CallException: org.xml.sax.SAXParseException; lineNumber: 513; columnNumber: 9; XML document structures must start and end within the same entity.
Caused by: org.xml.sax.SAXParseException; lineNumber: 513; columnNumber: 9; XML document structures must start and end within the same entity.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:251)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:300)
and a bunch of other exceptions which is not the important part here.
和一堆其他例外，这不是这里的重要部分。
I tried reinstalling eclipse, starting eclipse in -cleanmode and cleaning the workspace. Nothing worked. I created a new workspace too but the cache keeps coming back. I am using Eclipse 3.8 . Maybe an efficient way to clear the cache in eclipse would help? How would I do that. Nothing seems to work. (Also there is no option to manually clean the cache in Window>Preferences as was suggested in many articles).
我尝试重新安装 eclipse，以-clean模式启动 eclipse并清理工作区。没有任何效果。我也创建了一个新工作区，但缓存不断返回。我正在使用 Eclipse 3.8 。也许在 Eclipse 中清除缓存的有效方法会有所帮助？我该怎么做。似乎没有任何效果。（此外，许多文章中都建议在“窗口”>“首选项”中手动清理缓存没有选项）。
Or do I need to do something else? Any help is much appreciated. Thanks in advance.
还是我需要做其他事情？任何帮助深表感谢。提前致谢。
My java code (which is working perfectly fine,no errors in this):
我的 Java 代码（运行良好，没有错误）：
//in main
BufferedReader inp = new BufferedReader (new InputStreamReader(System.in));
String sinput=inp.readLine();
System.out.println(sinput+"\t \t \t"+getSimilarartists(sinput));
//to fetch similar artists
public static StringBuilder getSimilarartists(String artist){
String key = "af2bfbcb4dd49870fdb8e92f128f4ff7";
StringBuilder sb = new StringBuilder();
String art=(Artist.getSimilar(artist, key)).toString();
int i=0;
while(i<art.length()-5){
if((art.substring(i, (i+4))).equalsIgnoreCase("name")){
i=i+6;
while(art.charAt(i)!='\''){
sb.append(art.charAt(i));
i++;
}
break;
}
i++;
}
return sb;
}
Output(just the last few lines):
输出（仅最后几行）：
hans zimmer; I recommend=Hans Zimmer & James Newton Howard<br>
nelly furtado; I recommend=Jennifer Lopez<br>
madonna; I recommend=Kylie Minogue<br>
blink-182; I recommend=Box Car Racer<br>
dave gahan; I recommend=Depeche Mode<br>
kelly clarkson; I recommend=Carrie Underwood<br>
lucie silvas; I recommend=Delta Goodrem<br>
natalie imbruglia; I recommend=Melanie C<br>
michelle branch; I recommend=The Wreckers<br>
delta goodrem; I recommend=Ricki-Lee<br>
new order; I recommend=Electronic<br>
seal; I recommend=Simply Red<br>
atomic kitten; I recommend=Liberty X
*** (this is where I had terminated my previous run) ***
[Fatal Error] :513:9: XML document structures must start and end within the same entity.<br>
Exception in thread "main" de.umass.lastfm.CallException: org.xml.sax.SAXParseException; lineNumber: 513; columnNumber: 9; XML document structures must start and end within the same entity.
at de.umass.lastfm.Caller.call(Caller.java:268)<br>
at de.umass.lastfm.Caller.call(Caller.java:189)<br>
at de.umass.lastfm.Caller.call(Caller.java:185)<br>
at de.umass.lastfm.Artist.getSimilar(Artist.java:144)<br>
at de.umass.lastfm.Artist.getSimilar(Artist.java:132)<br>
at Recommender.getSimilarartists(Recommender.java:89)<br>
at Recommender.main(Recommender.java:58)<br>
Caused by: org.xml.sax.SAXParseException; lineNumber: 513; columnNumber: 9; XML document structures must start and end within the same entity.<br>
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:251)
at <br>
com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:300)<br>
at de.umass.lastfm.Caller.createResultFromInputStream(Caller.java:324)<br>
at de.umass.lastfm.Caller.call(Caller.java:256)<br>
... 6 more
回答by Mike Thomsen
Errors like this are usually indicative of a badly formatted document:
像这样的错误通常表示文档格式错误：
Caused by: org.xml.sax.SAXParseException; lineNumber: 513; columnNumber: 9; XML document structures must start and end within the same entity. at
引起：org.xml.sax.SAXParseException；行号：513；列数：9；XML 文档结构必须在同一实体内开始和结束。在
A few things you can do to debug this:
你可以做一些事情来调试这个：
- Print out the XML document to a log and run it through some sort of XML validator.
- Check to make sure that there are no invalid characters (ex UTF-16 characters in a UTF-8 document)
- 将 XML 文档打印到日志中并通过某种 XML 验证器运行它。
- 检查以确保没有无效字符（例如 UTF-8 文档中的 UTF-16 字符）
回答by Konstantin Komissarchik
Neither Eclipse nor Java cache web content when doing regular I/O. The content can be cached somewhere else, though. Perhaps de.umass.lastfm API that you are using is doing this. Perhaps there is something in your OS or on your network.
在进行常规 I/O 时，Eclipse 和 Java 都不会缓存 Web 内容。不过，内容可以缓存在其他地方。也许您正在使用的 de.umass.lastfm API 正在执行此操作。也许您的操作系统或网络中存在某些问题。
