com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.itsvse.es.models.CarPosition` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
Cannot construct instance of `com.itsvse.es.models.CarPosition$Point` (although at least one Creator exists): can only instantiate non-static inner class by using default, no-argument constructor
The class adds a constructor as follows:
com.fasterxml.jackson.core.JsonParseException: Unexpected character ('' (code 65279 / 0xfeff)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
Error causes:
The txt text file I read in Java isUFT-8 BOM encoding format resulted inof, meConverting a file file to utf-8 works fine！ But since I have too many files, I can't manually convert each one to utf-8 format!
citation
EF BB BF54 68 69 73 20 69 73 20 74 68 65 20 66 69 72 73 74 20 6C 69 6E 65 2E
? This is the first line.
54 68 69 73 20 69 73 20 73 65 63 6F 6E 64 20 6C 69 6E 65 2E
This is second line.
The "EF BB BF" in the red part happens to be the BOM encoding of the UTF-8 file, which shows that Java did not correctly handle the BOM encoding of the UTF-8 file when reading the file, and treated the first 3 bytes as text content.
Solution:
maven references the following package:
Read the txt file code as follows:
I tested whether it was reading a UTF-8 BOM file or a UTF-8 format file, it was successfully converted to a UTF-8 format file, and the deserialization was successful!
One last word, no fastjson again! When encountering Alibaba's open source, if it is not the difference in advantages, don't take a detour.
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Posted on 1/14/2019 4:23:10 PM
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