无法反序列化不符合START_OBJECT令牌的org.joda.time.datetime或LocalDate实例

Question

   
com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of org.joda.time.DateTime out of START_OBJECT token
at Source: org.mortbay.jetty.HttpParser$Input@46a09b; line: 1, column: 752
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:164)
at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:599)
at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:593)
at com.fasterxml.jackson.datatype.joda.deser.DateTimeDeserializer.deserialize(DateTimeDeserializer.java:51)
at com.fasterxml.jackson.datatype.joda.deser.DateTimeDeserializer.deserialize(DateTimeDeserializer.java:21)
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:375)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:559)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObjectUsingNonDefault(BeanDeserializer.java:393)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:289)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:121)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:226)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:203)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:23)
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:375)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeSetAndReturn(MethodProperty.java:106)
at com.fasterxml.jackson.databind.deser.BuilderBasedDeserializer.deserializeFromObject(BuilderBasedDeserializer.java:326)
at com.fasterxml.jackson.databind.deser.BuilderBasedDeserializer.deserialize(BuilderBasedDeserializer.java:143)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:226)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:203)
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:23)
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:375)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeSetAndReturn(MethodProperty.java:106)
at com.fasterxml.jackson.databind.deser.BuilderBasedDeserializer.deserializeFromObject(BuilderBasedDeserializer.java:

LocalDate也出现相同问题

com.fasterxml.jackson.databind.JsonMappingException: Unexpected token (START_OBJECT), expected START_ARRAY: expected JSON Array, String or Number
at Source: org.mortbay.jetty.HttpParser$Input@d297c0; line: 1, column: 51
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:164)
at com.fasterxml.jackson.databind.DeserializationContext.wrongTokenException(DeserializationContext.java:692)
at com.fasterxml.jackson.datatype.joda.deser.LocalDateDeserializer.deserialize(LocalDateDeserializer.java:50)
....

为什么调用链在一种情况下传递START_OBJECT，而在另一种情况下传递START_ARRAY？

Answer 1

为了解决类似的问题,

我从http://mvnrepository.com/artifact/com.fasterxml.jackson.datatype/jackson-datatype-joda/2.2.1下载了jackson-datatype-joda-2.2.1.jar。

然后我在我的应用程序中为每个LocalDate字段添加了一个注释，如下所示：

@JsonDeserialize(using=LocalDateDeserializer.class)
private LocalDate releasedDate;

导入的内容如下所示：

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.datatype.joda.deser.LocalDateDeserializer;

问题也就烟消云散了。

希望这有帮助！