标题翻译
Apache Camel: Cannot deserialize instance of out of START_ARRAY token
问题
我通过 HTTP 访问 REST 服务，该服务返回以下 JSON 数据：
[
{
"name": "D",
"surname": "D"
},
{
"name": "T",
"surname": "T"
}
]
为了在调用时将其转换为对象，我创建了以下数据结构：
@Data
public class User {
String name;
String surname;
}
我尝试按照以下方式处理数据：
public static void addDirectRestRoute(RouteBuilder routeBuilder, String directEndpointName, String url, String a) {
routeBuilder.from("direct://" + directEndpointName)
.setHeader(Exchange.CONTENT_TYPE, constant("application/json"))
.setHeader(Exchange.HTTP_METHOD).constant(HttpMethod.GET)
//.setHeader(Exchange.HTTP_QUERY, simple("?id=1"))
.to(url)
.unmarshal().json(JsonLibrary.Jackson, User.class);
//.unmarshal(new JacksonDataFormat(User.class));
}
但是出现了错误。我尝试了以下数据结构：
@Data
public class User {
List<U> u;
@Data
public class U {
String name;
String surname;
}
}
我仍然遇到了错误。以下是错误的详细信息：
[ERROR] r.s.e.g.i.r.s.ShopImportRoute - 无法从 START_ARRAY 令牌中反序列化 `ru.sportmaster.esm.geogate.integration.domain.dto.User` 的实例
在 [Source: (org.apache.camel.converter.stream.CachedOutputStream$WrappedInputStream); line: 1, column: 1]
com.fasterxml.jackson.databind.exc.MismatchedInputException: 无法从 START_ARRAY 令牌中反序列化 `ru.sportmaster.esm.geogate.integration.domain.dto.User` 的实例
在 [Source: (org.apache.camel.converter.stream.CachedOutputStream$WrappedInputStream); line: 1, column: 1]
at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63)
at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1343)
at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1139)
at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1093)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromArray(BeanDeserializerBase.java:1461)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:185)
你的数据结构有什么问题？
英文翻译
I go over http to the rest service, which returns this json:
[
{
"name":"D",
"surname":"D"
},
{
"name":"T",
"surname":"T"
}
]
In order to change it to an object when called, I created this structure:
@Data
public class User {
String name;
String surname;
}
I tried to take it like this:
public static void addDirectRestRoute(RouteBuilder routeBuilder, String directEndpointName, String url, String a) {
routeBuilder.from("direct://" + directEndpointName)
.setHeader(Exchange.CONTENT_TYPE, constant("application/json"))
.setHeader(Exchange.HTTP_METHOD).constant(HttpMethod.GET)
//.setHeader(Exchange.HTTP_QUERY, simple("?id=1"))
.to(url)
.unmarshal().json(JsonLibrary.Jackson, User.class);
//.unmarshal(new JacksonDataFormat(User.class));
}
Get an error. I tried this:
@Data
public class User {
List<U> u;
@Data
public class U {
String name;
String surname;
}
}
I still get an error. Here's the error:
[ERROR] r.s.e.g.i.r.s.ShopImportRoute - Cannot deserialize instance of `ru.sportmaster.esm.geogate.integration.domain.dto.User` out of START_ARRAY token
at [Source: (org.apache.camel.converter.stream.CachedOutputStream$WrappedInputStream); line: 1, column: 1]
com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `ru.sportmaster.esm.geogate.integration.domain.dto.User` out of START_ARRAY token
at [Source: (org.apache.camel.converter.stream.CachedOutputStream$WrappedInputStream); line: 1, column: 1]
at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:63)
at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1343)
at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1139)
at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1093)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromArray(BeanDeserializerBase.java:1461)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:185)
What is wrong with my data structure?
专注分享java语言的经验与见解，让所有开发者获益！
评论