JsonParseException : Illegal unquoted character ((CTRL-CHAR, code 10)

java json character-encoding apache-httpclient-4.x
jian zhong picture jian zhong · Jul 21, 2015 · Viewed 126k times · Source

I'm trying to use org.apache.httpcomponents to consume a Rest API, which will post JSON format data to API.

I get this exception:

Caused by: com.fasterxml.jackson.core.JsonParseException: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string.

The reason is because ctrl-char is included in the JSON string.

Is there any way to replace this or some other solution?

Answer

pyrospade picture pyrospade · Dec 29, 2015

This can happen if you have a newline (or other control character) in a JSON string literal.

{"foo": "bar
baz"}

If you are the one producing the data, replace actual newlines with escaped ones "\\n" when creating your string literals.

{"foo": "bar\nbaz"}

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