[英]GSON parsing of nested array
Im having difficulties understanding if GSON can handle this kind of json by default or do I need to implement deserializers for every sub element. 我在理解GSON是否可以默认处理此类json时遇到困难,还是我需要为每个子元素实现反序列化器。
json input json输入
{
"services":[
{
"id": 2,
"name": "Buy"
},
{
"id": 3,
"name": "Sell"
}
]
"status": {
"code": 0,
"message": ""
}
}
The best case result on my part is to have the following class contain all the data 我最好的情况是让以下类包含所有数据
java [ POJO ] Java [POJO]
public class Services {
public List<ServiceItem> services;
public Status status;
public class ServiceItem {
public int id;
public String name;
}
public class Status {
public int code;
public String message;
}
}
Is it possible to let GSON the class and the json and just let it work? 是否可以让GSON作为类和json并使其正常工作? Or do I need to create deserializers for each sub class? 还是我需要为每个子类创建反序列化器?
Correct your json input as follow (you forgot a comma before status
field) 更正您的json输入,如下所示(您在status
字段前忘记了逗号)
{
"services":[
{
"id": 2,
"name": "Buy"
},
{
"id": 3,
"name": "Sell"
}
],
"status": {
"code": 0,
"message": ""
}
}
Then let's consider your classes as follow 然后让我们考虑以下课程
public class Services {
public List<ServiceItem> services;
public Status status;
// getters and setters
@Override
public String toString() {
return "["+services.toString()+status.toString()+"]";
}
public class ServiceItem {
public int id;
public String name;
// getters and setters
@Override
public String toString() {
return "("+id+","+name+")";
}
}
public class Status {
public int code;
public String message;
// getters and setters
@Override
public String toString() {
return ",("+code+","+message+")";
}
}
}
If the input is a file jsonInput.json
then 如果输入是文件jsonInput.json
则
Gson gson = new Gson();
Services data = gson.fromJson(new BufferedReader(new FileReader(
"jsonInput.json")), new TypeToken<Services>() {
}.getType());
System.out.println(data);
If the input is a json String jsonInput
then 如果输入是json字符串jsonInput
则
Gson gson = new Gson();
Services data = gson.fromJson(jsonInput, Services.class);
System.out.println(data);
Output: 输出:
[[(2,Buy), (3,Sell)],(0,)]
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