为什么javaccmaven插件不会为第二个jjt包生成Node和SimpleNode

仅为

play/parser/expr/ExpressionParser.jjjt

生成节点和SimpleNode，而不是为

play/parser/expr2/Expr2Parser.jjjt

甚至我设置了

NODE\u PACKAGE=“play.parser.expr2”仍然不工作

如何为第二个jjt包生成
Node
和
SimpleNode

> mvn javacc:jjtree-javacc


[INFO] ------------------------------------------------------------------------
[INFO] Building try 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- javacc-maven-plugin:2.6:jjtree-javacc (default-cli) @ try ---
[WARNING] File encoding for grammars has not been configured, using platform default encoding, i.e. build is platform dependent!
Java Compiler Compiler Version 6.1_2 (Tree Builder)
(type "jjtree" with no arguments for help)
Reading from file /SOME_WHEREtry/src/main/jjtree/play/parser/expr/ExpressionParser.jjt . . .
opt:java
File "Node.java" does not exist.  Will create one.
File "SimpleNode.java" does not exist.  Will create one.
File "ExpressionParserTreeConstants.java" does not exist.  Will create one.
File "ExpressionParserVisitor.java" does not exist.  Will create one.
File "ExpressionParserDefaultVisitor.java" does not exist.  Will create one.
File "JJTExpressionParserState.java" does not exist.  Will create one.
Annotated grammar generated successfully in /SOME_WHEREtry/target/javacc-1449905090759/node/ExpressionParser.jj
Java Compiler Compiler Version 6.1_2 (Parser Generator)
(type "javacc" with no arguments for help)
Reading from file /SOME_WHEREtry/target/javacc-1449905090759/node/ExpressionParser.jj . . .
File "TokenMgrError.java" does not exist.  Will create one.
File "ParseException.java" does not exist.  Will create one.
File "Token.java" does not exist.  Will create one.
File "SimpleCharStream.java" does not exist.  Will create one.
Parser generated successfully.
Java Compiler Compiler Version 6.1_2 (Tree Builder)
(type "jjtree" with no arguments for help)
Reading from file /SOME_WHEREtry/src/main/jjtree/play/parser/expr2/Expr2Parser.jjt . . .
opt:java
File "Expr2ParserTreeConstants.java" does not exist.  Will create one.
File "Expr2ParserVisitor.java" does not exist.  Will create one.
File "Expr2ParserDefaultVisitor.java" does not exist.  Will create one.
File "JJTExpr2ParserState.java" does not exist.  Will create one.
Annotated grammar generated successfully in /SOME_WHEREtry/target/javacc-1449905090970/node/Expr2Parser.jj
Java Compiler Compiler Version 6.1_2 (Parser Generator)
(type "javacc" with no arguments for help)
Reading from file /SOME_WHEREtry/target/javacc-1449905090970/node/Expr2Parser.jj . . .
File "TokenMgrError.java" does not exist.  Will create one.
File "ParseException.java" does not exist.  Will create one.
File "Token.java" does not exist.  Will create one.
File "JavaCharStream.java" does not exist.  Will create one.
Parser generated successfully.
[INFO] Processed 2 grammars
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------