Jackson cannot parse values with hexadecimal digits

[hil...@gmail.com]

string with hexadecimal digits is valid, but jackson can not pase these values.

Is there a solution or did i miss something?

final ObjectMapper mapper = new ObjectMapper();
//        mapper.configure(JsonGenerator.Feature.QUOTE_FIELD_NAMES, false);
//        mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
        String json1 = "{\"message\":\"h\u0001ellotest\"}";
        Obj jsonUsers = mapper.readValue(json1.getBytes(),Obj.class);

Exception in thread "main" com.fasterxml.jackson.databind.JsonMappingException: Illegal unquoted character ((CTRL-CHAR, code 1)): has to be escaped using backslash to be included in string value
 at [Source: [B@6f1fba17; line: 1, column: 15] (through reference chain: j8.Obj["message"])
        at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:210)
        at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:177)
        at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.wrapAndThrow(BeanDeserializerBase.java:1474)
        at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:260)
        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:125)
        at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3736)
        at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2819)
        at j8.JacksonTest.main(JacksonTest.java:24)

[Tatu Saloranta]

On Mon, Apr 16, 2018 at 11:31 PM, <hil...@gmail.com> wrote:

string with hexadecimal digits is valid, but jackson can not pase these values.

Is there a solution or did i miss something?

Yes, you are tripped by javac :)

You are not including string with character escape, but literal Unicode character with value 0x1, which is a control character

(and excluded as per diagram).

You would need to double-escape value in source code a la:

   String json1 = "{\"message\":\"h\\u0001ellotest\"}";

-+ Tatu +-

 

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