Please help me for My springboot app

[SeoWooSoft]

I migrated Spring Boot

Before Spring Boot : 2.4 Java : 1.6, Jackson : 2.11.3

After Spring Boot : 2.7.18 Java : 1.7, Jackson : 2.13.5

The application was running well before, but after the migration, an error occurred. How to Can i Fix without modify controller

Post Request Body {"data1":"value1", "data2":null}
Controller Sourc @PostMapping("/api/MVUR/updatePtInfo") public ResultVO updatePtInfo(@RequestBody Map<String, String> params) throws Exception { Common.paramToMap(params); return transactionService.updatePtInfo(params); }
Error org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Unexpected JSON token at offset 147: Expected string literal but 'null' literal was found at path: $['data2'] Use 'coerceInputValues = true' in 'Json {} builder to coerce nulls to default values. JSON input: .....60115","data2":null,"agreementOnline":null,"a.....; nested exception is kotlinx.serialization.json.internal.JsonDecodingException: Unexpected JSON token at offset 147: Expected string literal but 'null' literal was found at path: $['data2'] Use 'coerceInputValues = true' in 'Json {} builder to coerce nulls to default values. JSON input: .....60115","data2":null,"agreementOnline":null,"a.....

[cowtowncoder]

I am not sure this is due to Jackson issue, but rather something about Spring Boot: you'd probably be better off bringing this up on Spring support forums.

But simply from error message it looks like nulls are not accepted as values, only non-null JSON Strings.
If so, client would need to only send Strings and possibly replace nulls on send with empty Strings (or skipping entries).

At any rate, exception is not thrown by Jackson and seems to have nothing Jackson-specific or related.