Parse a JSON Object

I have a JSON object like the following:

{
 "a" : "test", 
 "b" : "test", 
 "c" : [{"d": "test data", "f": ['e','f','g']}, 
      开发者_开发百科  {"f": "test data", "f": ['e','f','g']}
       ], 
  "d" : [{"g": "test data", "f": ['e','f','g']}, 
         {"h": "test data", "f": ['e','f','g']}
        ]  
}

I need to parse this and display it in a tree format. Could somebody show some direction please. I am working on ruby.

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For a JSON parser, look at JSON.org

Listed there:

• json
• yajl-ruby
• json-stream