Android 泛型Gson反序列化器
我有一个Api,该Api如下所示:Android 泛型Gson反序列化器,android,json,gson,Android,Json,Gson,我有一个Api,该Api如下所示: 如果响应正常,则结构将以数据关键字开始,例如: { "data": { "name": "Rogelio Volkman", "address": "27299 Will Bridge Suite 058\nWest Reubenhaven, MI 00736", "lat": 54.65, "lng": 111.75, "phone": "+26(4)5015498663" } } 如果响应不正常(状态不是200),则响应将不会包含数据关键字,因此响应
如果响应正常,则结构将以
数据
关键字开始,例如:
{
"data": {
"name": "Rogelio Volkman",
"address": "27299 Will Bridge Suite 058\nWest Reubenhaven, MI 00736",
"lat": 54.65,
"lng": 111.75,
"phone": "+26(4)5015498663"
}
}
如果响应不正常(状态不是200),则响应将不会包含数据
关键字,因此响应将如下所示:
{
"message": "404 Not Found",
"status_code": 404
}
由于此结构是所有模型的通用结构,我打算为所有模型创建一个通用反序列化器。这看起来像:
public class DataObjectDeserializer implements JsonDeserializer<Object> {
@Override
public Objectdeserialize(JsonElement je, Type type, JsonDeserializationContext jdc)
throws JsonParseException {
// Get the "data" element from the parsed JSON
JsonElement data = je.getAsJsonObject().get("data");
// Deserialize it. You use a new instance of Gson to avoid infinite recursion
// to this deserializer
return new Gson().fromJson(data, Object.class);
}
}
并向Gson注册它,比如Gson Gson=new GsonBuilder().registerTypeHierarchyAdapter(DataObjectModel.class,new DataObjectDeserializer()).create()代码>。但这也没有反序列化博物馆
模型
问题是:我如何为父类创建一个反序列化器来同时反序列化子类(作为我的第二种方法),或者我如何使用Gson创建一个泛型类,以便围绕数据包装的每个tyoe都可以像这样使用:
公共类DataObjectDeserializer实现JsonDeserializer{
@Override
public DataObjectModel deserialize(JsonElement je, Type type, JsonDeserializationContext jdc)
throws JsonParseException {
// Get the "data" element from the parsed JSON
JsonElement data = je.getAsJsonObject().get("data");
// Deserialize it. You use a new instance of Gson to avoid infinite recursion
// to this deserializer
return new Gson().fromJson(data, DataObjectModel.class);
}
}
@Override
public T deserialize(JsonElement je, Type type, JsonDeserializationContext jdc)
throws JsonParseException {
// Get the "data" element from the parsed JSON
JsonElement data = je.getAsJsonObject().get("data");
// Deserialize it. You use a new instance of Gson to avoid infinite recursion
// to this deserializer
return new Gson().fromJson(data, /* This part not working due to type erasing in java*/ T.calss);
}
}
如果您像这样创建响应和数据结构
private class Data {
@SerializedName("name")
private String name;
@SerializedName("address")
private String address;
@SerializedName("lat")
private String lat;
@SerializedName("lng")
private String lng;
@SerializedName("phone")
private String phone;
}
private class Response {
@SerializedName("message")
private String message;
@SerializedName("status_code")
private int statusCode;
@SerializedName("data")
private Data data;
}
然后你就可以做了
Response response = new Gson().fromJson(json, Response.class);
if(response.statusCode == 0) {
//everything ok, do something with response.data
} else {
//display response.message, data will be null
}
@EIDuderino是的,当然可以,但这需要我为每个gson反序列化创建2个模型,这不是优化的解决方案