json转换为自定义类型的集合

先导入GSON的jar包

public class TestEntity {
private String businessId;
private Office office;
private String a;

}

String businessId = "[{"businessId":"1"},{"businessId":"2"}]";
List<TestEntity> testEntities = new Gson().fromJson(businessId, new TypeToken<List<TestEntity>>(){}.getType());