问当我试图反序列化对象列表时，Jackson会抛出错误映射异常。

EN

com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of FIELD_NAME token
 at [Source: {
  "objectEntries": [
    {
      "objectKey": "KDS-4300"
    },
    {
      "objectKey": "KDS-4327"
    }
  ]
}; line: 2, column: 3]

objectMapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);

@JsonIgnoreProperties(ignoreUnknown = true)
public class InsightQueryResult {
    @JsonProperty("objectEntries")
    private List<ObjectEntry> objectEntries;

    @JsonCreator
    public InsightQueryResult(List<ObjectEntry> objectEntries) {
        this.objectEntries = objectEntries;
    }

    public List<ObjectEntry> getObjectEntries() {
        return objectEntries;
    }

    // equals, hashCode and toString
}

@JsonIgnoreProperties(ignoreUnknown = true)
public class ObjectEntry {
    @JsonProperty("objectKey")
    private String objectKey;

    @JsonCreator
    public ObjectEntry(String objectKey) {
        this.objectKey = objectKey;
    }

    public String getObjectKey() {
        return objectKey;
    }
 // equals, hashCode and toString
}

    @Test
    public void shouldMapQueryResultToResultObject() throws IOException {
        final Resource expectedQueryResult= new ClassPathResource("testQueryPayload.json");
        final String expectedQueryResultData = new String(
                Files.readAllBytes(expectedQueryResult.getFile().toPath())).trim();

        final List<ObjectEntry> objectEntries = Arrays.asList(new ObjectEntry("KDS-4300"), new ObjectEntry("KD-4327"));
        final InsightQueryResult expectedQueryResult = new InsightQueryResult(objectEntries);

        final InsightQueryResult result = objectMapper.readValue(expectedQueryResultData, InsightQueryResult.class);

        assertThat(result).isEqualTo(expectedQueryResult);
    }

// testQueryPayload.json
{
  "objectEntries": [
    {
      "objectKey": "KDS-4300"
    },
    {
      "objectKey": "KDS-4327"
    }
  ]
}