解決：cannot deserialize from Object value (no delegate- or property-based Creator)

前因后果：
前兩天在寫一個簡單頁面的時候，前端通過ajax請求發(fā)送參數(shù)，后端創(chuàng)建了一個實體類用來接收參數(shù)，這個實體類添加了Lombok的@Data注解，沒有創(chuàng)建其他構(gòu)造函數(shù)，當(dāng)前端發(fā)送請求時后端控制臺就會拋出以下異常，后經(jīng)過查詢發(fā)現(xiàn)原來是因為實體類沒有無參構(gòu)造函數(shù)造成的。

解決方式：
手動創(chuàng)建一個無參構(gòu)造器或者添加Lombok注解@NoArgsConstructor即可。

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class com.thunisoft.commons.cryptoonline.bean.ParamBean]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.thunisoft.commons.cryptoonline.bean.ParamBean` (no Creators, like default constructor, exist): cannot deserialize from Object value (no delegate- or property-based Creator)at [Source: (PushbackInputStream); line: 1, column: 2]] with root causecom.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.thunisoft.commons.cryptoonline.bean.ParamBean` (no Creators, like default constructor, exist): cannot deserialize from Object value (no delegate- or property-based Creator)at [Source: (PushbackInputStream); line: 1, column: 2]

總結(jié)

以上是生活随笔為你收集整理的解决：cannot deserialize from Object value (no delegate- or property-based Creator)的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。