postman으로 /request-body-json-v1 호출시 500 error

Json형태의 request 에서 아래 예제 그대로 진행했는데, 자꾸 500 error가 나와서요

java 24, springboot 2.5.5

@Slf4j @Controller public class RequestBodyJsonController { private ObjectMapper objectMapper = new ObjectMapper(); @PostMapping("/request-body-json-v1") public void requestBodyJsonV1(HttpServletRequest request, HttpServletResponse response) throws IOException { ServletInputStream inputStream = request.getInputStream(); String messageBody = StreamUtils.copyToString(inputStream, StandardCharsets.UTF_8); log.info("messageBody={}", messageBody); HelloData helloData = objectMapper.readValue(messageBody, HelloData.class); log.info("username={}, age={}", helloData.getUsername(), helloData.getAge()); response.getWriter().write("ok"); } }

[postman] 수행결과

{
    "timestamp": "2025-08-24T05:03:39.632+00:00",
    "status": 500,
    "error": "Internal Server Error",
    "path": "/request-body-json-v1"
}

[인텔리제이 로그]

2025-08-24T14:03:39.540+09:00 INFO 6552 --- [springmvc] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'

2025-08-24T14:03:39.541+09:00 INFO 6552 --- [springmvc] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 0 ms

2025-08-24T14:03:39.570+09:00 INFO 6552 --- [springmvc] [nio-8080-exec-1] h.s.b.request.RequestBodyJsonController : messageBody={"usernsme":"aaa", "age":20}

2025-08-24T14:03:39.620+09:00 ERROR 6552 --- [springmvc] [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "usernsme" (class hello.springmvc.basic.HelloData), not marked as ignorable (2 known properties: "username", "age"])

at [Source: REDACTED StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); line: 1, column: 14] (through reference chain: hello.springmvc.basic.HelloData["usernsme"])

at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:61) ~[jackson-databind-2.19.2.jar:2.19.2]

at com.fasterxml.jackson.databind.DeserializationContext.handleUnknownProperty(DeserializationContext.java:1180) ~[jackson-databind-2.19.2.jar:2.19.2]

at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:2244) ~[jackson-databind-2.19.2.jar:2.19.2]

at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1823) ~[jackson-databind-2.19.2.jar:2.19.2]

at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1801) ~[jackson-databind-2.19.2.jar:2.19.2]

at

{
    "username": "aaa",
    "age": 20
}