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Using JSON to return a Java map

What's the best way to return a Java map using JSON format? My specific need is a key -> value relationship between date and number.

My concern is this: my structure basically contains N elements of the same type (mapping between date and number) and I want to be able to iterate over them quickly via Javascript.

In XML I would:

<relation date='mydate' number='mynumber'/>
<relation date='mydate' number='mynumber'/>
...
<relation date='mydate' number='mynumber'/>

and I would use jQuery like this:

$(xml).find("relation").each(function() {
    $(this).attr("date"); // the date
    $(this).attr("number"); // the number
})

This is my first experience with JSON and I would like to know if I can do something similar.

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2 answers


Although I haven't tried it myself, the Java implementation of JSON from json.org has a constructor .JSONObject

JSONObject(Map)



Once the JSON object is created from Map

, then the JSON string can be retrieved by calling the toString

.

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String myJson = "{ ";
for (String key : myMap.keySet())
    myJson += key + " : " + "'" + myMap.get(key) + "',";
myJson += " } ";

I leave the last comma because it won't give us much trouble. Javascript just ignores it.



Well this will answer your question, but I guess it won't help. Try posting a more specific version.

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