我正在使用 JAVA 的 last.fm API，可以找到 here .
我有一个巨大的Dataset其中我只使用包含用户艺术家历史和播放的文件。我用 Java 编写了一段代码，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。
我运行了一次，但不是为所有艺术家运行的。我中途终止了调试。然而下一次，我的结果从缓存中返回，请求不再发送到网络服务器。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 artists=Artist.getTopAlbums() 使用另一种方法，我中途终止并在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)
和一堆其他的异常(exception)情况，这不是这里的重要部分。
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。我也创建了一个新的工作区，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。 (也没有像许多文章中建议的那样在 Window>Preferences 中手动清理缓存的选项)。
或者我需要做其他事情吗？任何帮助深表感谢。提前致谢。
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;
}
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
最佳答案
这样的错误通常表示文档格式不正确:
Caused by: org.xml.sax.SAXParseException; lineNumber: 513; columnNumber: 9; XML document structures must start and end within the same entity. at
您可以做一些事情来调试它:
关于java - eclipse : XML document structures must start and end within the same entity 中的 SaxParseException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23156292/