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Eclipse下使用Stanford CoreNLP的方法

2024-08-07 00:16:34   210人阅读

源码下载地址：CoreNLP官网。

目前release的CoreNLP version 3.5.0版本仅支持java-1.8及以上版本，因此有时需要为Eclipse添加jdk-1.8配置，配置方法如下：

  • 首先，去oracle官网下载java-1.8，下载网址为：java下载，安装完成后。
  • 打开Eclipse，选择Window -> Preferences -> Java –> Installed JREs 进行配置：
  • 点击窗体右边的“add”，然后添加一个“Standard VM”（应该是标准虚拟机的意思），然后点击“next”；
  • 在”JRE HOME”那一行点击右边的“Directory…”找到你java 的安装路径，比如“C:Program Files/Java/jdk1.8”

这样你的Eclipse就已经支持jdk-1.8了。

1. 新建java工程，注意编译环境版本选择1.8

2. 将官网下载的源码解压到工程下，并导入所需jar包

如导入stanford-corenlp-3.5.0.jar、stanford-corenlp-3.5.0-javadoc.jar、stanford-corenlp-3.5.0-models.jar、stanford-corenlp-3.5.0-sources.jar、xom.jar等

导入jar包过程为：项目右击->Properties->Java Build Path->Libraries，点击“Add JARs”，在路径中选取相应的jar包即可。

3. 新建TestCoreNLP类，代码如下

 1 package Test; 2  3 import java.util.List; 4 import java.util.Map; 5 import java.util.Properties; 6  7 import edu.stanford.nlp.dcoref.CorefChain; 8 import edu.stanford.nlp.dcoref.CorefCoreAnnotations.CorefChainAnnotation; 9 import edu.stanford.nlp.ling.CoreAnnotations.LemmaAnnotation;10 import edu.stanford.nlp.ling.CoreAnnotations.NamedEntityTagAnnotation;11 import edu.stanford.nlp.ling.CoreAnnotations.PartOfSpeechAnnotation;12 import edu.stanford.nlp.ling.CoreAnnotations.SentencesAnnotation;13 import edu.stanford.nlp.ling.CoreAnnotations.TextAnnotation;14 import edu.stanford.nlp.ling.CoreAnnotations.TokensAnnotation;15 import edu.stanford.nlp.ling.CoreLabel;16 import edu.stanford.nlp.pipeline.Annotation;17 import edu.stanford.nlp.pipeline.StanfordCoreNLP;18 import edu.stanford.nlp.semgraph.SemanticGraph;19 import edu.stanford.nlp.semgraph.SemanticGraphCoreAnnotations.CollapsedCCProcessedDependenciesAnnotation;20 import edu.stanford.nlp.sentiment.SentimentCoreAnnotations;21 import edu.stanford.nlp.trees.Tree;22 import edu.stanford.nlp.trees.TreeCoreAnnotations.TreeAnnotation;23 import edu.stanford.nlp.util.CoreMap;24 25 public class TestCoreNLP {26     public static void main(String[] args) {27         // creates a StanfordCoreNLP object, with POS tagging, lemmatization, NER, parsing, and coreference resolution28         Properties props = new Properties();29         props.put("annotators", "tokenize, ssplit, pos, lemma, ner, parse, dcoref");30         StanfordCoreNLP pipeline = new StanfordCoreNLP(props);31         32         // read some text in the text variable33         String text = "Add your text here:Beijing sings Lenovo";34         35         // create an empty Annotation just with the given text36         Annotation document = new Annotation(text);37         38         // run all Annotators on this text39         pipeline.annotate(document);40         41         // these are all the sentences in this document42         // a CoreMap is essentially a Map that uses class objects as keys and has values with custom types43         List<CoreMap> sentences = document.get(SentencesAnnotation.class);44         45         System.out.println("word\tpos\tlemma\tner");46         for(CoreMap sentence: sentences) {47              // traversing the words in the current sentence48              // a CoreLabel is a CoreMap with additional token-specific methods49             for (CoreLabel token: sentence.get(TokensAnnotation.class)) {50                 // this is the text of the token51                 String word = token.get(TextAnnotation.class);52                 // this is the POS tag of the token53                 String pos = token.get(PartOfSpeechAnnotation.class);54                 // this is the NER label of the token55                 String ne = token.get(NamedEntityTagAnnotation.class);56                 String lemma = token.get(LemmaAnnotation.class);57                 58                 System.out.println(word+"\t"+pos+"\t"+lemma+"\t"+ne);59             }60             // this is the parse tree of the current sentence61             Tree tree = sentence.get(TreeAnnotation.class);62             63             // this is the Stanford dependency graph of the current sentence64             SemanticGraph dependencies = sentence.get(CollapsedCCProcessedDependenciesAnnotation.class);65         }66         // This is the coreference link graph67         // Each chain stores a set of mentions that link to each other,68         // along with a method for getting the most representative mention69         // Both sentence and token offsets start at 1!70         Map<Integer, CorefChain> graph = document.get(CorefChainAnnotation.class);71     }72 }

PS：该代码的思想是将text字符串交给Stanford CoreNLP处理，StanfordCoreNLP的各个组件（annotator）按“tokenize（分词）, ssplit（断句）, pos（词性标注）, lemma（词元化）, ner（命名实体识别）, parse（语法分析）, dcoref（同义词分辨）”顺序进行处理。

处理完后List<CoreMap> sentences = document.get(SentencesAnnotation.class);中包含了所有分析结果，遍历即可获知结果。

这里简单的将单词、词性、词元、是否实体打印出来。其余的用法参见官网（如sentiment、parse、relation等）。

4. 执行结果：

Eclipse下使用Stanford CoreNLP的方法


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