小编JPT*_*JPT的帖子

初学者的问题：如何将解析树的可读版本打印到stdout？

CharStream input = CharStreams.fromFileName("testdata/test.txt");
MyLexer lexer = new MyLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
MyParser parser = new MyParser(tokens);     
parser.setBuildParseTree(true);
RuleContext tree = parser.record();
System.out.println(tree.toStringTree(parser));

这将整棵树打印在由方括号'（）'分隔的一行上。

(record (husband <4601>   (name KOHAI   Nikolaus) \n (birth *   um.1872   (place Ploschitz)) \n\n) (wife      (marriage oo) \n      (name SCHLOTTHAUER   Maria) \n      (birth *   um.1877  
...

我想要这样的东西

record 
  husband
    <id>
    name
       <name>
...
  wife