我正在编写一个使用robospice，改造和Jackson 2.4.X的Android应用，
这是我尝试反序列化的json，它是从rest服务返回的。返回的“数据”数组中的元素是我要反序列化的Notification对象。
{
"data": [
{
"uuid": "XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX",
"AcctNo": "XXXXXXXXXX",
"title": "Test Notification",
"content": "Here is some content.",
"date": "2015-03-24"
}
]
}
我首先将响应包装在NotificationResponse对象中：
@JsonRootName(value = "data")
@JsonIgnoreProperties(ignoreUnknown = true)
public class NotificationResponse {
@JsonUnwrapped
public Notification[] notifications;
}
通知对象如下所示：
public class Notification {
@JsonProperty("uuid")
public String Uuid;
@JsonProperty("AcctNo")
public String acctNo;
@JsonProperty("title")
public String title;
@JsonProperty("content")
public String content;
@JsonProperty("date")
public String date;
}
堆栈跟踪：
04-01 11:51:17.326 18978-19463/com.xxxxx.android E/﹕ An exception occurred during request network execution :com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.xxxxx.android.model.NotificationResponse out of START_ARRAY token
at [Source: retrofit.ExceptionCatchingTypedInput$ExceptionCatchingInputStream@8b4da58; line: 1, column: 2]
retrofit.RetrofitError: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.xxxxx.android.model.NotificationResponse out of START_ARRAY token
at [Source: retrofit.ExceptionCatchingTypedInput$ExceptionCatchingInputStream@8b4da58; line: 1, column: 2]
at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:383)
at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:240)
at java.lang.reflect.Proxy.invoke(Proxy.java:397)
at $Proxy15.notifications(Unknown Source)
at com.xxxxx.android.network.spice.NotificationSpiceRequest.loadDataFromNetwork(NotificationSpiceRequest.java:21)
at com.xxxxx.android.network.spice.NotificationSpiceRequest.loadDataFromNetwork(NotificationSpiceRequest.java:9)
at com.octo.android.robospice.request.CachedSpiceRequest.loadDataFromNetwork(CachedSpiceRequest.java:48)
at com.octo.android.robospice.request.DefaultRequestRunner.processRequest(DefaultRequestRunner.java:150)
at com.octo.android.robospice.request.DefaultRequestRunner$1.run(DefaultRequestRunner.java:217)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: retrofit.converter.ConversionException: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.xxxxx.android.model.NotificationResponse out of START_ARRAY token
at [Source: retrofit.ExceptionCatchingTypedInput$ExceptionCatchingInputStream@8b4da58; line: 1, column: 2]
at retrofit.converter.JacksonConverter.fromBody(JacksonConverter.java:40)
at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:367)
at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:240)
at java.lang.reflect.Proxy.invoke(Proxy.java:397)
at $Proxy15.notifications(Unknown Source)
at com.xxxxx.android.network.spice.NotificationSpiceRequest.loadDataFromNetwork(NotificationSpiceRequest.java:21)
at com.xxxxx.android.network.spice.NotificationSpiceRequest.loadDataFromNetwork(NotificationSpiceRequest.java:9)
at com.octo.android.robospice.request.CachedSpiceRequest.loadDataFromNetwork(CachedSpiceRequest.java:48)
at com.octo.android.robospice.request.DefaultRequestRunner.processRequest(DefaultRequestRunner.java:150)
at com.octo.android.robospice.request.DefaultRequestRunner$1.run(DefaultRequestRunner.java:217)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.xxxxx.android.model.NotificationResponse out of START_ARRAY token
at [Source: retrofit.ExceptionCatchingTypedInput$ExceptionCatchingInputStream@8b4da58; line: 1, column: 2]
at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:749)
at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:745)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromArray(BeanDeserializerBase.java:1203)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:147)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:126)
at com.fasterxml.jackson.databind.ObjectMapper._unwrapAndDeserialize(ObjectMapper.java:3126)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3049)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2206)
at retrofit.converter.JacksonConverter.fromBody(JacksonConverter.java:36)
at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:367)
at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:240)
at java.lang.reflect.Proxy.invoke(Proxy.java:397)
at $Proxy15.notifications(Unknown Source)
at com.xxxxx.android.network.spice.NotificationSpiceRequest.loadDataFromNetwork(NotificationSpiceRequest.java:21)
at com.xxxxx.android.network.spice.NotificationSpiceRequest.loadDataFromNetwork(NotificationSpiceRequest.java:9)
at com.octo.android.robospice.request.CachedSpiceRequest.loadDataFromNetwork(CachedSpiceRequest.java:48)
at com.octo.android.robospice.request.DefaultRequestRunner.processRequest(DefaultRequestRunner.java:150)
at com.octo.android.robospice.request.DefaultRequestRunner$1.run(DefaultRequestRunner.java:217)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
提前致谢。让我知道您是否需要其他信息。
编辑：我忘了提到我正在使用以下：
ObjectMapper om = new ObjectMapper();
om.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true);
最佳答案
您需要在NotificationResponse对象中用@JsonCreator注释的构造函数，如下所示：
@JsonCreator
public NotificationResponse(Notification[] notifications) {
this.notifications = notifications;
}
关于java - 改进:使用一个元素反序列化数组时出错:“超出START_ARRAY token ”，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/29395611/