Getting a diff of two JSON strings using Java code

Question

Can anybody suggest some Java Library or Code to get a diff of two JSON Strings?

Answer 1

For one specific suggestion, you could use Jackson, bind JSON strings into JSON trees, and compare them for equality. Something like:

ObjectMapper mapper = new ObjectMapper();
JsonNode tree1 = mapper.readTree(jsonString1);
JsonNode tree2 = mapper.readTree(jsonString2);
if (tree1.equals(tree2)) { 
  // yes, contents are equal -- note, ordering of arrays matters, objects not
} else { 
  // not equal
}

equality comparison is by value and should work as expected with respect to JSON arrays, objects and primitive values.