Putting HashMap<String, object> in jsonobject

Question

i building a json object that consists of nameValue pairs defined in a Hashmap

the issue i am having is when i invoke:

jsonObject.put(hashmap);

It adds the nameValue pairs like this:

name=value instead of name:value

Any thoughts?

Thanks

It seems this one: json.org/javadoc/org/json/JSONObject.html — Jonathan Naguin
– Jonathan Naguin, Commented Jul 3, 2013 at 9:35

Multithreader · Accepted Answer · 2013-07-03 09:57:13Z

7

Use JSONObject constructor. DON"T CREATE YOUR OWN since you might miss some cases such when the value is an array.

JSONObject jsonObject = new JSONObject(hashMap);

This is actually a complete solution since it covers for corner cases such as where the value is an array. Thus, it will make it as JSONArray for you.

answered Jul 3, 2013 at 9:57

Multithreader

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1 Comment

ThunderStruct Over a year ago

Hate to dig up an old answer, but this does not work. The OP is asking for a conversion from HashMap<String, Object> to JSONObject. The constructor you mentioned only works with HashMap<String, String> as made clear here

Jonathan Naguin · Accepted Answer · 2013-07-03 09:35:35Z

6

Iterate through the HashMap and put to the jsonObject:

Iterator it = mp.entrySet().iterator();
while (it.hasNext()) {
    Map.Entry pairs = (Map.Entry)it.next();
    jsonObject.put(pairs.getKey(), pairs.getValue() );
}

answered Jul 3, 2013 at 9:35

Jonathan Naguin

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3 Comments

Jono Over a year ago

that did teh trick. Why doesnt jsonObject.put automatically handle it?

Jonathan Naguin Over a year ago

@jonney I am not sure, the documentation doesn't contain any put method with only one parameter... weird

Multithreader Over a year ago

There exists a built-in JSONObject constructor which covers for cases such as where the value is an array

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