如果我不需要它，我怎么能忽略它？我只需要賬單。如果我從 json 中刪除“版本”工作正常..我在控制臺日志上的錯誤2019-07-27 19:20:14.874 WARN 12516 --- [p-nio-80-exec-2] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unexpected token (FIELD_NAME), expected END_OBJECT: Current token not END_OBJECT (to match wrapper object with root name 'bill'), but FIELD_NAME; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Unexpected token (FIELD_NAME), expected END_OBJECT: Current token not END_OBJECT (to match wrapper object with root name 'bill'), but FIELD_NAME at [Source: (PushbackInputStream); line: 8, column: 2]]我的 json 看起來像這樣{ "bill": { "siteId":"gkfhuj-00", "billId":"d6334954-d1c2-4b51-bb10-11953d9511ea" }, "version":"1"}我的 json 類我嘗試使用 JsonIgnoreProperties 但它也沒有幫助我寫“版本”@JsonIgnoreProperties(ignoreUnknown = true)@JsonRootName(value = "bill")public class Bill { private String siteId; private String billId;//getters and setters我的 post 方法 lisen 對象 Bill @PostMapping("/bill") @ResponseBody public ResponseEntity<String> getBill(@RequestBody Bill bill)
1 回答
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TA貢獻(xiàn)1802條經(jīng)驗 獲得超10個贊
由于您依賴于Spring bootthrough 注釋和Jackson，因此自定義反序列化器將在這里完美運行。您必須創(chuàng)建反序列化器類，如下所示
public class BillDeserializer extends StdDeserializer<Bill> {
public BillDeserializer() {
this(null);
}
public BillDeserializer(Class<?> vc) {
super(vc);
}
@Override
public Bill deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException {
JsonNode billNode = jp.getCodec().readTree(jp);
Bill bill = new Bill();
bill.setSiteId(billNode.get("bill").get("siteId").textValue());
bill.setBillId(billNode.get("bill").get("billId").textValue());
return bill;
}
}
現(xiàn)在你必須指示你Jackson使用這個反序列化器而不是類的默認(rèn)反序列化器Bill。這是通過注冊 desearilizer 來完成的?？梢酝ㄟ^Bill類上的簡單注釋來完成，例如@JsonDeserialize(using = BillDeserializer.class)
您的Bill課程通常如下所示
@JsonDeserialize(using = BillDeserializer.class)
public class Bill {
private String siteId;
private String billId;
//getters and setters
}
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