com.google.gson.internal.LinkedHashTreeMap不能转换为我的对象 [英] com.google.gson.internal.LinkedHashTreeMap cannot be cast to my object
问题描述
我的JSON文件看起来像
I have JSON file looks like
{
"SUBS_UID" : {
"featureSetName" : "SIEMENSGSMTELEPHONY MULTISIM",
"featureName" : "MULTISIMIMSI",
"featureKey" : [{
"key" : "SCKEY",
"valueType" : 0,
"value" : "0"
}
]
},
}
所以关键是一个字符串SUBS_ID,该值是一个名为FeatureDetails的模型,其中包含属性featureSetName,featureName,...。
所以我使用google.json库读取JSON文件,像这样,
So the key is a String "SUBS_ID" and the value is a model called FeatureDetails which contains attributes "featureSetName,featureName,...". So i read from the JSON file using google.json lib like this,
HashMap<String, FeatureDetails> featuresFromJson = new Gson().fromJson(JSONFeatureSet, HashMap.class);
然后我试着循环这个HashMap获取值并将其转换为我的FeatureDetails模型, (Map.Entry entry:featuresFromJson.entrySet()){
featureDetails =(FeatureDetails)entry.getValue
then I'm trying to loop over this HashMap getting the value and cast it to my FeatureDetails model,
for (Map.Entry entry : featuresFromJson.entrySet()) {
featureDetails = (FeatureDetails) entry.getValue();
}
这里是我的FeatureDetails模型,
and here is my FeatureDetails Model,
public class FeatureDetails {
private String featureSetName;
private String featureName;
private ArrayList<FeatureKey> featureKey;
private String groupKey;
private String groupValue;
public FeatureDetails() {
featureKey = new ArrayList<FeatureKey>();
}
public ArrayList<FeatureKey> getFeatureKey() {
return featureKey;
}
public void setFeatureKey(ArrayList<FeatureKey> featureKey) {
this.featureKey = featureKey;
}
public String getGroupKey() {
return groupKey;
}
public void setGroupKey(String groupKey) {
this.groupKey = groupKey;
}
public String getGroupValue() {
return groupValue;
}
public void setGroupValue(String groupValue) {
this.groupValue = groupValue;
}
public String getFeatureName() {
return featureName;
}
public void setFeatureName(String featureName) {
this.featureName = featureName;
}
public String getFeatureSetName() {
return featureSetName;
}
public void setFeatureSetName(String featureSetName) {
this.featureSetName = featureSetName;
}
}
但我得到一个异常com.google.gson .internal.LinkedHashTreeMap不能转换为com.asset.vsv.models.FeatureDetail。
but i got an exception "com.google.gson.internal.LinkedHashTreeMap cannot be cast to com.asset.vsv.models.FeatureDetail".
推荐答案
试试这个:
HashMap<String, FeatureDetails> featuresFromJson = new Gson().fromJson(JSONFeatureSet, new TypeToken<Map<String, FeatureDetails>>() {}.getType());
当你通过哈希映射时,请执行以下操作:
$ b (Map.Entry< String,FeatureDetails>条目:featuresFromJson.entrySet()){
FeatureDetails featureDetails = entry.getValue(); $ b
and when you going through your hash map do this:
for (Map.Entry<String, FeatureDetails> entry : featuresFromJson.entrySet()) {
FeatureDetails featureDetails = entry.getValue();
}
这篇关于com.google.gson.internal.LinkedHashTreeMap不能转换为我的对象的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!