问题描述
我有以下示例json数据
I have sample json data like below
试图解析杰克逊解析器中的数据字段,并为其值创建ObjectCategories类(setter getter).
Trying to parse data field in jackson parser and created ObjectCategories class(setter getter) for its values.
@JsonProperty("categories")
private List<ObjectCategory> categories;
@SuppressWarnings("unchecked")
@JsonProperty(DATA)
private void unpackNested(Map<String,Object> data) {
this.categories = (ArrayList<ObjectCategory>) data.get("detection");
}
如果执行上面的代码,则出现此异常- getCategories().get(0).getAccuracy()到 java.util.LinkedHashMap不能转换为ObjectCategory
If we execute the above code, getting this exception - getCategories().get(0).getAccuracy() to java.util.LinkedHashMap cannot be cast to ObjectCategory
getCategories().get(0)返回Map值.如何解析我的ObjectCategory类.
getCategories().get(0) returns Map value. How to parse with my ObjectCategory class.
推荐答案
如果最初将其反序列化为地图,则可以转换该值.
You can convert the value if you originally deserialized it to map.
this.categories = objectMapper
.convertValue(data.get("detection"),
new TypeReference<List<ObjectCategory>>() {});
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