我正在使用可以在这里找到的JAVA的last.fm API。我有一个庞大的数据集,其中我只使用了带有用户艺术家历史和播放记录的文件。我已经用Java编写了一段代码,提取这些艺术家名称并根据
我运行了一次,但不是所有的艺术家都进行了测试。我中途终止了调试。然而,下一次,我的结果是从缓存中返回的,请求不再发送到Web服务器。问题是,这次我只得到了直到我停止结果的艺术家为止的结果。我尝试使用另一种方式
Artist.getSimilar()
方法返回相似的艺术家。我运行了一次,但不是所有的艺术家都进行了测试。我中途终止了调试。然而,下一次,我的结果是从缓存中返回的,请求不再发送到Web服务器。问题是,这次我只得到了直到我停止结果的艺术家为止的结果。我尝试使用另一种方式
artists=Artist.getTopAlbums()
,在中途停止后遇到了同样的问题。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)
还有一些其他的异常,这里不是重点。
我尝试过重新安装eclipse,在-clean
模式下启动eclipse和清理工作区。但都没有起作用。我也创建了一个新的工作区,但缓存仍然存在。我正在使用Eclipse 3.8。也许有效清除Eclipse缓存的方法会有所帮助?我该怎么做呢?似乎什么都不起作用。(在很多文章中建议在Window>Preferences中手动清除缓存,但是这里没有这个选项。)
或者我需要做其他的事情吗?非常感谢任何帮助。提前谢谢。
我的Java代码(完全正常运行,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;
}
输出结果(只需输出最后几行):
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