斯坦福大学NLP：以树格式打印解析器树

Question

这是一个愚蠢的问题，但我怎样才能以树形格式打印NLP解析树的结果？

这是我的代码：

public static void main(String[] args) { 

     Annotation document = 
       new Annotation("My dog also likes eating sausage."); 
      Properties props = new Properties(); 
      props.setProperty("annotators", "tokenize,ssplit,pos,lemma,ner,parse"); 
      StanfordCoreNLP pipeline = new StanfordCoreNLP(props); 
      pipeline.annotate(document); 
      for (CoreMap sentence : document.get(CoreAnnotations.SentencesAnnotation.class)) { 
       Tree constituencyParse = sentence.get(TreeCoreAnnotations.TreeAnnotation.class); 
       System.out.println(constituencyParse); 

     } 
    } 

在执行时，我得到以下结果在Eclipse控制台：

(ROOT (S (NP (PRP$ My) (NN dog)) (ADVP (RB also)) (VP (VBZ likes) (NP (JJ eating) (NN sausage))) (. .))) 

有没有办法在实际的树格式打印此即事喜欢这个？

(ROOT 
(S 
    (NP (PRP$ My) (NN dog)) 
    (ADVP (RB also)) 
    (VP (VBZ likes) 
    (S 
     (VP (VBG eating) 
     (NP (NN sausage))))) 
(. .))) 

Answer 1

以下语句将以打印格式打印树。

tree.pennPrint();