Reading a text file with JSON data in Java

Question

I am trying to read a text file with JSON data in it using Java.

I use the following lines of code:

InputStream is = new FileInputStream(fileName);
JSONObject ret; 
try {
    s = IOUtils.toString(is);
    ret = (JSONObject)JSONSerializer.toJSON(s);
}

I however, am not able to get the JSON value in the ret variable and I in fact get a null value in the String 's'. Is there something that I am overlooking here?

I would greatly appreciate any help.

I am getting an exception at the " s = IOUtils.toString(ins);" line for some reason. I am not sure why? Is it not possible to use it this way, if the data in the file is JSON? Can some one please throw some light on this? — reg_frenzy
– reg_frenzy, Commented May 10, 2011 at 18:55

learner · Accepted Answer · 2011-07-08 19:00:31Z

4

You may try out this example,

It worked well for me and can be extended easily to suit your json file http://answers.oreilly.com/topic/257-how-to-parse-json-in-java/

answered Jul 8, 2011 at 19:00

learner

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Comments

Brian Agnew · Accepted Answer · 2011-05-10 17:09:29Z

2

and I in fact get a null value in the String 's'

Sounds like your file doesn't exist or is not readable. You can check this via File.exists() and File.canRead()

answered May 10, 2011 at 17:09

Brian Agnew

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1 Comment

reg_frenzy Over a year ago

Brian, I did ensure that the file exists and it can be read. It satisfies both and I still get a null for the string.

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