Fasterxml Jackson ObjectMapper生成带有'='字符的JSON字符串

Question

This question refers to Java library com.fasterxml.jackson.core:jackson-databind:2.8.8 ( jackson-databind-2.8.8.jar )

Given object is a POJO with:

@com.fasterxml.jackson.annotation.JsonRawValue
private Map<String, String> innerDetail = new HashMap<String, String>();

innerDetail.put("Auth", "{\"node\":\"VALUE\"}");

(The POJO is also annotated with com.fasterxml.jackson.annotation.JsonInclude )

Then calling:

com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(object)

Returns a String containing:

"innerDetail":{Auth={"node":"VALUE"}

Surely the = (equals) should be a : (colon)?

I don't see that = is any part of JSON syntax.

Answer 1

It's due to your use of @JsonRawValue . The JavaDoc for it says

...Warning: the resulting JSON stream may be invalid depending on your input value.