[英]How to deserialize an array object in spring boot
my question is very simple, I have a spring boot controller that recibes a array of objects like that:我的问题很简单,我有一个 spring boot 控制器,它可以接收这样的对象数组:
@RequestMapping(value = "/contracts/{id}/milestones", method = RequestMethod.PUT, headers = "Accept=application/json")
@ResponseBody
@Transactional
public ResponseEntity<?> updateContractMilestones(@PathVariable("id") String contractId,
@DTO(MilestoneUpdateStateDto.class) List<Milestone> milestones,UriComponentsBuilder uriComponentsBuilder, final HttpServletRequest request) {
}
But when I send the following Json object:但是当我发送以下 Json 对象时:
[{"id":18,"state":"FINALIZED"},{"id":19,"state":"FINALIZED"}]
I get the following error:我收到以下错误:
Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of
com.espiritware.opusclick.dto.MilestoneUpdateStateDto
out of START_ARRAY token;无法读取 HTTP 消息:org.springframework.http.converter.HttpMessageNotReadableException:JSON 解析错误:无法从 START_ARRAY 令牌中反序列化
com.espiritware.opusclick.dto.MilestoneUpdateStateDto
实例; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance ofcom.espiritware.opusclick.dto.MilestoneUpdateStateDto
out of START_ARRAY token嵌套异常是 com.fasterxml.jackson.databind.exc.MismatchedInputException:无法从 START_ARRAY 令牌中反序列化
com.espiritware.opusclick.dto.MilestoneUpdateStateDto
实例
My question is what should I do from the backend side to be able to receive this object without errors?我的问题是我应该从后端做什么才能无错误地接收这个对象?
Many Thanks!非常感谢!
update your method signature to将您的方法签名更新为
@RequestMapping(value = "/contracts/{id}/milestones", method = RequestMethod.PUT, headers = "Accept=application/json")
@ResponseBody
@Transactional
public ResponseEntity<?> updateContractMilestones(
@PathVariable("id") String contractId,
List<MilestoneUpdateStateDto> milestones,
...
)
and try with this JSON并尝试使用此 JSON
{
[
{"id":18, "state":"FINALIZED"},
{"id":19, "state":"FINALIZED"}
]
}
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