On Thu, Jun 17, 2021 at 9:29 AM Никита <[email protected]> wrote:
>
> I need to parse json using jackson:
>
> String string = "{\"field\" : \" \\/ \"}";
>
> JsonNode node = new ObjectMapper().readTree(string);
> String result = node.toString();
> System.out.println(result);
>
> I expect this kind of output:
>
> result == {"field":" \/ "}
>
> But, I end up with:
>
> result == {"field":" / "}
>
> How can I receive output like this?
>
> result == {"field":" \/ "}
>
> java
This seems to be working as expected: Java compiler replaces "\\" in
input String with single "\", and then in JSON String "\" is taken to
mean JSON escaping so "\/" is decoded as "/".
It might make sense to construct JsonNode value instead of raw JSON
escaped String since then all escaping would be handled by Jackson --
but if you must pass a String that contains JSON, you will need to use
more escaping.
Something like:
String string = "{\"field\" : \" \\\\/ \"}";
(two "\"s for Javac, and then two of those for JSON escaping)
Constructing JsonNode on the other hand would be
ObjectNode n = mapper.createObjectNode();
n.put("field", "\\/"); // still need doubling for javac
-+ Tatu +-
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