我将我的微服务从 Spring 1.5.10.RELEASE
更新到了 Spring 2.0.3.RELEASE
,同时也把 lombok
从 1.16.14
升级到了 1.18.0
,jackson-datatype-jsr310
也从 2.9.4
升级到了 2.9.6
。
JSON 字符串 -
{"heading":"Validation failed","detail":"field must not be null"}
这个类 -
@Data
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonIgnoreProperties(ignoreUnknown = true)
public class ErrorDetail {
private final String heading;
private final String detail;
private String type;
}
方法调用 -
ErrorDetail errorDetail = asObject(jsonString, ErrorDetail.class);
反序列化所使用的方法 -
import com.fasterxml.jackson.databind.ObjectMapper;
// more imports and class defination.
private static <T> T asObject(final String str, Class<T> clazz) {
try {
return new ObjectMapper().readValue(str, clazz);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
错误 -
java.lang.RuntimeException: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.foo.bar.ErrorDetail` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
at [Source: (String)"{"heading":"Validation failed","detail":"field must not be null"}"; line: 1, column: 2]