How to convert from Json to Protobuf?

Question

I\'m new to using protobuf, and was wondering if there is a simple way to convert a json stream/string to a protobuf stream/string in Java?

For example,

Answer 1

With proto3 you can do this using JsonFormat. It parses directly from the JSON representation, so there is no need for separately calling MyMessage.parseFrom(...). Something like this should work:

JsonFormat.parser().merge(json_string, builder);