Java“Jackson”JsonMappingException：无法反序列化 FIELD_NAME 标记之外的浮点数实例
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Java "Hymanson" JsonMappingException: Can not deserialize instance of float out of FIELD_NAME token
提问by Dfr
with this class:
与这个类：
public class Products implements Serializable {
private BigDecimal productId;
private float priority;
public float getPriority() {
return priority;
}
public void setPriority(float priority) {
this.priority = priority;
}
}
When doing deserialization of such JSON data:
在对此类 JSON 数据进行反序列化时：
{"productId":47552,"priority":78}
Got this error:
得到这个错误：
org.codehaus.Hymanson.map.JsonMappingException:
Can not deserialize instance of float out of FIELD_NAME token
at [Source: org.apache.catalina.connector.CoyoteInputStream@103cf49; line: 1, \
column: 290] (through reference chain: entity.Products["priority"])
But for this data (quotes around priority value)
但是对于这个数据（围绕优先级值的引用）
{"productId":47552,"priority":"78"}
works well, so it seems that Hymanson (1.9.9) does not respect numeric values ? I suspect something is wrong here.
效果很好，所以 Hymanson (1.9.9) 似乎不尊重数值？我怀疑这里有问题。
采纳答案by Manikandan
You are declaring the field priority as a float type and you try to deserialize the Json which contains int value. Hymanson try to call a setter function which accepts a integer value. So we need to add one setter like this.
您将字段优先级声明为浮点类型，并尝试反序列化包含 int 值的 Json。Hymanson 尝试调用一个接受整数值的 setter 函数。所以我们需要像这样添加一个 setter。
public void setPriority(int priority){
this.priority = Float.valueOf(priority);
}
回答by sreemanth pulagam
Seems you declared priority as long and getter and setter methods are using float. can you check with
似乎您声明了优先级，因为 long 和 getter 和 setter 方法正在使用浮点数。你能检查一下吗
public long getPriority() {
return priority;
}
public void setPriority(long priority) {
this.priority = priority;
}
