java maven项目中的stanford NLP API错误

Question

I have been working on this project for a while. I'm using stanford NLP. I've added its dependency in my maven project. it used to work completely fine but now it shows this error: (I even downloaded similar project from git to find out if something is wrong done by me yet same message is displayed for that too. please let me know the problem)

Adding annotator tokenize
Adding annotator ssplit
Adding annotator pos

    Exception in thread "main" java.lang.RuntimeException: edu.stanford.nlp.io.RuntimeIOException: Unrecoverable error while loading a tagger model
        at edu.stanford.nlp.pipeline.StanfordCoreNLP$4.create(StanfordCoreNLP.java:493)
        at edu.stanford.nlp.pipeline.AnnotatorPool.get(AnnotatorPool.java:81)
        at edu.stanford.nlp.pipeline.StanfordCoreNLP.construct(StanfordCoreNLP.java:260)
        at edu.stanford.nlp.pipeline.StanfordCoreNLP.<init>(StanfordCoreNLP.java:127)
        at edu.stanford.nlp.pipeline.StanfordCoreNLP.<init>(StanfordCoreNLP.java:123)
        at CoreNlpExample.main(CoreNlpExample.java:17)
    Caused by: edu.stanford.nlp.io.RuntimeIOException: Unrecoverable error while loading a tagger model
        at edu.stanford.nlp.tagger.maxent.MaxentTagger.readModelAndInit(MaxentTagger.java:749)
        at edu.stanford.nlp.tagger.maxent.MaxentTagger.<init>(MaxentTagger.java:283)
        at edu.stanford.nlp.tagger.maxent.MaxentTagger.<init>(MaxentTagger.java:247)
        at edu.stanford.nlp.pipeline.POSTaggerAnnotator.loadModel(POSTaggerAnnotator.java:78)
        at edu.stanford.nlp.pipeline.POSTaggerAnnotator.<init>(POSTaggerAnnotator.java:62)
        at edu.stanford.nlp.pipeline.StanfordCoreNLP$4.create(StanfordCoreNLP.java:491)
        ... 5 more
    Caused by: java.io.IOException: Unable to resolve "edu/stanford/nlp/models/pos-tagger/english-left3words/english-left3words-distsim.tagger" as either class path, filename or URL
        at edu.stanford.nlp.io.IOUtils.getInputStreamFromURLOrClasspathOrFileSystem(IOUtils.java:419)
        at edu.stanford.nlp.tagger.maxent.MaxentTagger.readModelAndInit(MaxentTagger.java:744)
        ... 10 more

Answer 1

You need to include the models jar in your classpath. You can either download this manually, or include it with maven via the instructions at https://stanfordnlp.github.io/CoreNLP/download.html (replace version as appropriate):

<dependencies> <dependency>
    <groupId>edu.stanford.nlp</groupId>
    <artifactId>stanford-corenlp</artifactId>
    <version>3.8.0</version> 
  </dependency>
<dependency>
    <groupId>edu.stanford.nlp</groupId>
    <artifactId>stanford-corenlp</artifactId>
    <version>3.8.0</version>
    <classifier>models</classifier> 
  </dependency> 
</dependencies>