Java Coding Problems

Using Jackson

Jackson is a popular and fast library dedicated to processing (serializing/deserializing) JSON data. The Jackson API relies on com.fasterxml.jackson.databind.ObjectMapper. Let's go over the preceding examples again, but this time using Jackson:

ObjectMapper mapper = new ObjectMapper();

For deserialization, we use ObjectMapper.readValue(), while for serialization, we use ObjectMapper.writeValue():

• Let's read melons_array.json as an Array of Melon:

Melon[] melonsArray   = mapper.readValue(Files.newBufferedReader(    pathArray, StandardCharsets.UTF_8), Melon[].class);

• Let's read melons_array.json as a List of Melon:

List<Melon> melonsList   = mapper.readValue(Files.newBufferedReader( pathArray, StandardCharsets.UTF_8), ArrayList.class); ...