First thing: Your JSON is invalid. There is a comma after the second object in the sources array. This has to be deleted.

Second: I think you didn't choose the right type for your result. What your JSON represents is a map which maps from string to an array of objects. So the type should be something like Map<String, Props[]> (Since you didn't provide the name of your class, I called it Props.

With these considerations you can construct a MapType by using ObjectMappers getTypeFactory() method and deserialize the value using the constructed type like shown below.

ObjectMapper mapper = new ObjectMapper();
TypeFactory typeFactory = mapper.getTypeFactory();
MapType mapType = typeFactory.constructMapType(HashMap.class, String.class, Props[].class);
Map<String, Props[]> map = mapper.readValue(s, mapType);

As was said by others, you can't @Autowired it in directly into your controller.

@Emerson Farrugia's suggestion to create a new instance using

Jackson2ObjectMapperBuilder.json().build()

also didn't work for me because the obtained instance was not following the spring.jackson.* configuration properties, which I needed it to.

The solution I found was to obtain the ObjectMapper from Spring's MappingJackson2HttpMessageConverter which is injectable.

So I autowired it:

@Autowired
private MappingJackson2HttpMessageConverter springMvcJacksonConverter;

and then get the ObjectMapper from it like this:

ObjectMapper objectMapper = springMvcJacksonConverter.getObjectMapper();

This instance behaves exactly as Spring MVC's own message conversion - it probably is the same instance anyway.