如何创建类型为 'java.math.BigInteger' 和 BigInteger [] 的自定义反序列化程序值？

Question

• Pojo

@Data
@Builder
@JsonDeserialize(using = DeserializeResultCalculateSumSequence.class)
public class ResultCalculateSumSequenceDto {
private final BigInteger sumSequence;
private final BigInteger [] sequenceRange;
private final Boolean isCached;
}

我试着写

public class DeserializeResultCalculateSumSequence
extends StdDeserializer<ResultCalculateSumSequenceDto> {
public DeserializeResultCalculateSumSequence() {
this(null);
}
protected DeserializeResultCalculateSumSequence(Class<?> vc) {
super(vc);
}
@Override
public ResultCalculateSumSequenceDto deserialize(JsonParser jsonParser,
DeserializationContext deserializationContext)
throws IOException, JacksonException {
JsonNode node = jsonParser
.getCodec()
.readTree(jsonParser);
BigInteger sumSequence = node
.get("sumSequence")
.bigIntegerValue();
BigInteger [] sequenceRange
....
= node
.withArray("sequenceRange")
.binaryValue();
boolean isCached = node
.get("isCached")
.asBoolean();
return ResultCalculateSumSequenceDto
.builder()
.sumSequence(sumSequence)
.sequenceRange(sequenceRange)
.isCached(isCached)
.build();
}
}

但是我不知道如何为数组编写反序列化程序。

我也不知道它是否会起作用。也许有人有经验，知道如何创造这样的东西。请分享你的知识。

Answer 1

在我的案例中就是这样。

public class DeserializeResultCalculateSumSequence
extends StdDeserializer<ResultCalculateSumSequenceDto> {
public DeserializeResultCalculateSumSequence() {
this(null);
}
protected DeserializeResultCalculateSumSequence(Class<?> vc) {
super(vc);
}
@Override
public ResultCalculateSumSequenceDto deserialize(JsonParser jsonParser,
DeserializationContext deserializationContext)
throws IOException, JacksonException {
JsonNode node = jsonParser
.getCodec()
.readTree(jsonParser);
BigInteger sumSequence = node
.get("sumSequence")
.bigIntegerValue();
ObjectMapper mapper = new ObjectMapper();
String sequenceRangeStr = node.get("sequenceRange").toString();
BigInteger[] sequenceRange = mapper
.readValue(sequenceRangeStr, BigInteger[].class);

boolean isCached = node
.get("isCached")
.asBoolean();
return ResultCalculateSumSequenceDto
.builder()
.sumSequence(sumSequence)
.sequenceRange(sequenceRange)
.isCached(isCached)
.build();
}
}