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Do you know of any utility class/library, that can convert Map into URL-friendly query string?
Example:
I have a map:
"param1"=12, "param2"="cat" I want to get:
param1=12¶m2=cat final output
relativeUrl+param1=12¶m2=cat 
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Use Object#toString() . String string = map. toString();
Convert a Map to a String Using Java Streams To perform conversion using streams, we first need to create a stream out of the available Map keys. Second, we're mapping each key to a human-readable String.
The most robust one I saw off-the-shelf is the URLEncodedUtils class from Apache Http Compoments (HttpClient 4.0).
The method URLEncodedUtils.format() is what you need.
It doesn't use map so you can have duplicate parameter names, like,
a=1&a=2&b=3 Not that I recommend this kind of use of parameter names.
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