Pretty-Print JSON in Java

Question

I'm using json-simple and I need to pretty-print JSON data (make it more human readable).

I haven't been able to find this functionality within that library. How is this commonly achieved?

Answer 1

Google's GSON can do this in a nice way:

Gson gson = new GsonBuilder().setPrettyPrinting().create(); JsonParser jp = new JsonParser(); JsonElement je = jp.parse(uglyJsonString); String prettyJsonString = gson.toJson(je); 

or since it is now recommended to use the static parse method from JsonParser you can also use this instead:

Gson gson = new GsonBuilder().setPrettyPrinting().create(); JsonElement je = JsonParser.parseString​(uglyJsonString); String prettyJsonString = gson.toJson(je); 

Here is the import statement:

import com.google.gson.*; 

Here is the Gradle dependency:

implementation 'com.google.code.gson:gson:2.8.7'