Concatenate json strings into json object in Java

Question

Say I have a bunch of strings in json format

1. {"Name": Bob"}
2. {"Age" : 14}
3. {"address": "221 Baker street"}

Is there a way I can concatenate the json strings and create a json object in the end? i.e.

output -> {"Name": "Bob", "Age": 14, "Address": "221 Baker Street"}

I know I can parse each string and replace the "}" with a comma and that would work, but i was wondering if there was any inbuilt way of doing this

Thank you!

Answer 1

If you have Jackson on your classpath,

ObjectMapper mapper = new ObjectMapper();
Map<Object, Object> result = new HashMap<>();
result.putAll(mapper.readValue("{\"Name\": \"Bob\"}", Map.class));
result.putAll(mapper.readValue("{\"Age\": 14}", Map.class));
result.putAll(mapper.readValue("{\"address\": \"221 Baker street\"}", Map.class));
String concatenated = mapper.writeValueAsString(result);