我有这个架构:
public class Student {
public String name;
public School school;
}
public class School {
public int id;
public String name;
}
public class Data {
public ArrayList<Student> students;
public ArrayList<School> schools;
}
我想用Gson序列化Data对象,得到类似的东西:
{ "students": [{
"name":"name1",
"school": "1" //the id of the scool, not its entire Json
}],
"school": [{ //the entire JSON
"id" : "1",
"name": "schoolName"
}]
}
为此,我必须为学生部分使用自定义序列化程序,以便Gson只打印学校的ID。但是对于学校来说,我必须有正规的序列化器。
如何只用一个Gson对象来完成所有事情?
答案 0 :(得分:41)
您可以编写如下自定义序列化程序:
public class StudentAdapter implements JsonSerializer<Student> {
@Override
public JsonElement serialize(Student src, Type typeOfSrc,
JsonSerializationContext context) {
JsonObject obj = new JsonObject();
obj.addProperty("name", src.name);
obj.addProperty("school", src.school.id);
return obj;
}
}
答案 1 :(得分:25)
当然,无论您要序列化此对象,都需要将其添加到Gson中,如下所示:
Gson gson = new GsonBuilder()
.registerTypeAdapter(Student.class, new StudentAdapter())
.create();
return gson.toJson([YOUR_OBJECT_TO_BE_SERIALIZED]);