As I tried to deserialize a json string from database with jackson, I received error message like this:
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Exception in thread "main" com.fasterxml.jackson.core.JsonParseException: Unrecognized character escape 'W' (code 87) at [Source: (String)"{"text":"Hello \World!"}"; line: 1, column: 18] at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1840) at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:712) at com.fasterxml.jackson.core.base.ParserBase._handleUnrecognizedCharacterEscape(ParserBase.java:1031) at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._decodeEscaped(ReaderBasedJsonParser.java:2545) at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._finishString2(ReaderBasedJsonParser.java:2066) at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._finishString(ReaderBasedJsonParser.java:2039) at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.getText(ReaderBasedJsonParser.java:294) at com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializer$Vanilla.deserialize(UntypedObjectDeserializer.java:672) at com.fasterxml.jackson.databind.deser.std.MapDeserializer._readAndBindStringKeyMap(MapDeserializer.java:527) at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:364) at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:29) at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4202) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3205) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3173) at org.chobit.calf.MyApp.main(MyApp.java:23) |
The json string is:
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{"text":"Hello \World!"} |
It’s the Backslash in the source json string which lead to the error. Continue reading