Write ObjectNode to JSON String with UTF-8 Characters to Escaped ASCII

Question

I would like to write the contents of Jackson's ObjectNode to a string with the UTF-8 characters written as ASCII (Unicode escaped).

Here is a sample method:

private String writeUnicodeString() {
    ObjectMapper mapper = new ObjectMapper();
    ObjectNode node = mapper.getNodeFactory().objectNode();
    node.put("field1", "Maël Hörz");
    return node.toString();
}

By default, this outputs:

{"field1":"Maël Hörz"}

What I would like it to output is:

{"field1":"Ma\u00EBl H\u00F6rz"}

How can I accomplish this?

Via something like http://stackoverflow.com/a/4901205/3080094 ? — vanOekel, Apr 17 '14 at 08:41

score 67 · Accepted Answer · answered Apr 17 '14 at 09:14

67

You should enable the JsonGenerator feature which controls the escaping of the non-ASCII characters. Here is an example:

    ObjectMapper mapper = new ObjectMapper();
    mapper.getFactory().configure(JsonGenerator.Feature.ESCAPE_NON_ASCII, true);
    ObjectNode node = mapper.getNodeFactory().objectNode();
    node.put("field1", "Maël Hörz");
    System.out.println(mapper.writeValueAsString(node));

The output is:

{"field1":"Ma\u00EBl H\u00F6rz"}

answered Apr 17 '14 at 09:14

Alexey Gavrilov

10,593
2
38
48

2

On java play 2.3, the import are : com.fasterxml.jackson.databind.node.ObjectNode com.fasterxml.jackson.databind.ObjectMapper – Moebius Aug 26 '14 at 13:57
in which package/version is JsonGenerator from? – Ajay Takur Mar 24 '23 at 16:22
JsonGenerator.Feature.ESCAPE_NON_ASCII Since 2.10 use JsonWriteFeature.ESCAPE_NON_ASCII instead read more - https://fasterxml.github.io/jackson-core/javadoc/2.10/com/fasterxml/jackson/core/JsonGenerator.Feature.html – Emeka Jul 14 '23 at 12:03

score 10 · Answer 2 · answered Jan 26 '20 at 17:45

10

JsonGenerator is deprecated use JsonWriteFeature instead of it

 mapper.getFactory().configure(JsonWriteFeature.ESCAPE_NON_ASCII.mappedFeature(), true);

answered Jan 26 '20 at 17:45

Kailas010

345
4
5

I think you wanted to say that `JsonGenerator.ESCAPE_NON_ASCII` is deprecated. I don't see that `JsonGenerator` itself is deprecated, is it? – Garret Wilson Aug 20 '22 at 16:10
in which package/version is JsonWriteFeature from? – Ajay Takur Mar 24 '23 at 16:22

Write ObjectNode to JSON String with UTF-8 Characters to Escaped ASCII

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