可以配置Jackson来反序列化JSON Key(非value)吗?

Question

我正在尝试修剪JSONkey，以避免JSON请求中的空格。

JSON对象将看起来像空白，(检查"eq")

{
"page": 0,
"size": 25,
"and":{
"eq ": [
{
"field":"id",
"value": "60536"
}
]
}
}

我发现很多解决方案，从SimpleModule到JsonDeserializer，但通常都在价值部分工作。我如何修剪键本身，然后正确地转换成我的Java POJO?

public class SearchInDTO implements InDTO {
private Integer pageNo;
private Integer pageSize;
private ANDFilter andFilter;

@JsonProperty("page")
public Integer getPageNo() {
return pageNo;
}
public void setPageNo(Integer pageNo) {
this.pageNo = pageNo;
}
@JsonProperty("size")
public Integer getPageSize() {
return pageSize;
}
public void setPageSize(Integer pageSize) {
this.pageSize = pageSize;
}
@JsonProperty("and")
public ANDFilter getAndFilter() {
return andFilter;
}
public void setAndFilter(ANDFilter andFilter) {
this.andFilter = andFilter;
}

public static class EQFilter extends FieldValue
{
@JsonProperty("field")
public String getFieldName() {
return super.getFieldName();
}
@JsonProperty("value")
public String getValue() {
return super.getValue();
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("EQFilter{");
sb.append(super.toString());
sb.append('}');
return sb.toString();
}
}
public static class FieldValue
{
private String fieldName;
private String value;
@JsonProperty("field")
public String getFieldName() {
return fieldName;
}
public void setFieldName(String fieldName) {
this.fieldName = fieldName;
}
@JsonProperty("value")
public String getValue() {
if(value == null) return value;
return value.toLowerCase();
}
public void setValue(String value) {
this.value = value;
}
}
public static class ANDFilter {
private List<EQFilter> eqFilters = new ArrayList<>();
@JsonProperty("eq")
public List<EQFilter> getEqFilters() {
return eqFilters;
}
public void setEqFilters(List<EQFilter> eqFilters) {
this.eqFilters = eqFilters;
}
}
}

Answer 1

使用自定义JsonParser实现的解决方案:

public class MyJsonParser extends JsonParserDelegate {
public MyJsonParser(JsonParser parser) {
super(parser);
}
@Override
public String getCurrentName() throws IOException {
return super.getCurrentName().trim();
}
}

public class MyJsonParserFactory extends MappingJsonFactory {
@Override
protected JsonParser _createParser(InputStream in, IOContext ctxt) throws IOException {
return new MyJsonParser(super._createParser(in, ctxt));
}
@Override
protected JsonParser _createParser(Reader r, IOContext ctxt) throws IOException {
return new MyJsonParser(super._createParser(r, ctxt));
}
@Override
protected JsonParser _createParser(char[] data, int offset, int len, IOContext ctxt, boolean recyclable) throws IOException {
return new MyJsonParser(super._createParser(data, offset, len, ctxt, recyclable));
}
@Override
protected JsonParser _createParser(byte[] data, int offset, int len, IOContext ctxt) throws IOException {
return new MyJsonParser(super._createParser(data, offset, len, ctxt));
}
@Override
protected JsonParser _createParser(DataInput input, IOContext ctxt) throws IOException {
return new MyJsonParser(super._createParser(input, ctxt));
}
}

@Component
public class MyJackson2ObjectMapperBuilderCustomizer implements Jackson2ObjectMapperBuilderCustomizer {
@Override
public void customize(Jackson2ObjectMapperBuilder jacksonObjectMapperBuilder) {
jacksonObjectMapperBuilder.factory(new MyJsonParserFactory());
}
}