json和list互相转换

先导入Gson依赖

    implementation 'com.google.code.gson:gson:2.8.6'

list转换为json

Gson gson = new Gson();  
List<Person> persons = new ArrayList<Person>();  
String str = gson.toJson(persons); 

json转换为list

Gson gson = new Gson();  
List<Person> persons = gson.fromJson(str, new TypeToken<List<Person>>(){}.getType());

不要瞎找帖子了,就这么滴简单...