[英]How to write initbinder for json deserialization?
我有以下POJO:
class MyClass{
...
HttpStatus httpStatus = HttpStatus.OK //from org.springframework.http
@JsonIgnore
public HttpStatus getHttpStatus() {
return httpStatus;
}
@JsonProperty(value = "HttpStatus")
public void setHttpStatus(HttpStatus httpStatus) {
this.httpStatus = httpStatus;
}
....
}
當我從表單接受(construct)對象以將String正確轉換為InitBinder
我已經寫了InitBinder
:
@InitBinder
public void initBinder(WebDataBinder binder) {
binder.registerCustomEditor(HttpStatus.class, new PropertyEditorSupport() {
public void setAsText(String code) {
if (StringUtils.isNotBlank(code)) {
setValue(HttpStatus.valueOf(Integer.parseInt(code)));
}
}
});
對於形式,它很酷。
我也有接受json的控制器方法:
@RequestMapping(value = "sendData.json", method = RequestMethod.POST, consumes = "application/json;charset=UTF-8",
headers = "content-type=application/x-www-form-urlencoded")
@ResponseStatus(HttpStatus.NO_CONTENT)
public void putJsonData(@RequestBody MyClass myClass) {
....
}
我這樣傳遞httpStatus:
...
"HttpStatus":500
...
但是它轉換不正確,我看到以下錯誤消息:
Bad Request","exception":"org.springframework.http.converter.HttpMessageNotReadableException","message":"Could not read JSON: Can not construct instance of org.springframework.http.HttpStatus from number value (500): index value outside legal index range [0..65]\n
據我了解,它轉換不正確。
如何自定義此過程?
這樣解決了問題:
class MyClass{
...
HttpStatus httpStatus = HttpStatus.OK //from org.springframework.http
@JsonIgnore
public HttpStatus getHttpStatus() {
return httpStatus;
}
@JsonProperty(value = "HttpStatus")
@JsonDeserialize(using = HttpStatusDeserializer.class)
public void setHttpStatus(HttpStatus httpStatus) {
this.httpStatus = httpStatus;
}
....
}
和反序列化器:
public class HttpStatusDeserializer extends JsonDeserializer<HttpStatus> {
@Override
public HttpStatus deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
ObjectCodec oc = jsonParser.getCodec();
JsonNode node = oc.readTree(jsonParser);
return HttpStatus.valueOf(Integer.parseInt(node.asText()));
}
}
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