通过命令行参数执行Java程序

Question

I am working on stanford code nlp package to get sentiment result.

In execution I need to give the text file name as a input.

java -cp stanford-corenlp-3.3.0.jar;stanford-corenlp-3.3.0-models.jar;xom.jar;joda-time.jar -Xmx600m edu.stanford.nlp.pipeline.StanfordCoreNLP -annotators tokenize,ssplit,pos,lemma,parse -file input.txt

input.txt contains some text.

Can some one tell me here how can I pass string text directly rather giving a file name input.txt ?

Answer 1

You would need to modify your main program in such a way that it reads from arguments.

eg:

public static void main(String args[]){
    // here args[] will contain you input strings
//check null for args
    //args[0] --> -annotators 
    //args[1] --> values of -annotators 
    //args[2] --> /file or -inputs 
    //args[3] to args[length] --> you input text
for(int i=3;i<args.length;i++){
    System.out.println(args[i]);
}

And then your command line appears as

java -cp stanford-corenlp-3.3.0.jar;stanford-corenlp-3.3.0-models.jar;xom.jar;joda-time.jar -Xmx600m edu.stanford.nlp.pipeline.StanfordCoreNLP -annotators tokenize,ssplit,pos,lemma,parse -inputs this is my input text

Note: you would need to provide validations

Answer 2

Warning: I haven't tried this ...

If you run StanfordCoreNLP with neither -file or -filelist arguments, it runs as a "shell", reading input from stdin until it sees a q . So you might be able to do this:

$ ( echo "text to be parsed" ; echo q ) | \
  java -cp ... edu.stanford.nlp.pipeline.StanfordCoreNLP ...

But IMO it is cleaner if you send the text to a file and then use the application as it was designed to be used; eg

$ echo "text to be parsed" > /tmp/input
$ java -cp ... edu.stanford.nlp.pipeline.StanfordCoreNLP ... -file /tmp/input