使用斯坦福nlp的SUTime包时出现异常

Question

我正在尝试通过这段代码通过CoreNLP使用斯坦福NLP的SUTime：

AnnotationPipeline pipeline = new AnnotationPipeline();
pipeline.addAnnotator(new TimeAnnotator("sutime", props));

Annotation annotation = new Annotation("The interesting date is 4 days from today and it is 20th july of this year, another date is 18th Feb 1997");
annotation.set(CoreAnnotations.DocDateAnnotation.class, "2013-07-14");
pipeline.annotate(annotation);
List<CoreMap> timexAnnsAll = annotation.get(TimeAnnotations.TimexAnnotations.class);

然而，它最终抛出了这个异常：

Reading TokensRegex rules from edu/stanford/nlp/models/sutime/defs.sutime.txt
Reading TokensRegex rules from edu/stanford/nlp/models/sutime/english.sutime.txt
Reading TokensRegex rules from edu/stanford/nlp/models/sutime/english.holidays.sutime.txt
Exception in thread "main" java.lang.NullPointerException
    at edu.stanford.nlp.ie.NumberNormalizer.findNumbers(NumberNormalizer.java:423)
    at edu.stanford.nlp.ie.NumberNormalizer.findAndMergeNumbers(NumberNormalizer.java:721)
    at edu.stanford.nlp.time.TimeExpressionExtractorImpl.extractTimeExpressions(TimeExpressionExtractorImpl.java:184)
    at edu.stanford.nlp.time.TimeExpressionExtractorImpl.extractTimeExpressions(TimeExpressionExtractorImpl.java:178)
    at edu.stanford.nlp.time.TimeExpressionExtractorImpl.extractTimeExpressionCoreMaps(TimeExpressionExtractorImpl.java:116)
    at edu.stanford.nlp.time.TimeAnnotator.annotateSingleSentence(TimeAnnotator.java:240)
    at edu.stanford.nlp.time.TimeAnnotator.annotate(TimeAnnotator.java:226)
    at edu.stanford.nlp.pipeline.AnnotationPipeline.annotate(AnnotationPipeline.java:68)
    at dd.stanford.main(stanford.java:74)

我使用的是maven的3.5.2版本。有人知道为什么会有这样的例外吗？提前谢谢。

Answer 1

这是崩溃，因为你没有标记化文本。

将您的代码更改为：

AnnotationPipeline pipeline = new AnnotationPipeline();
pipeline.addAnnotator(new TokenizerAnnotator(false));
pipeline.addAnnotator(new TimeAnnotator("sutime", props));