java安卓使用Jackson库：如何加载索引范围从到的对象

2 月，2 周 Questions & Answers 361

我有非常大的JSON文件用于解析和管理。我的JSON文件包含如下结构

[
{"id": "11040548","key1":"keyValue1","key2":"keyValue2","key3":"keyValue3","key4":"keyValue4","key5":"keyValue5","key6":"keyValue6","key7":"keyValue7","key8":"keyValue8","key9":"keyValue9","key10":"keyValue10","key11":"keyValue11","key12":"keyValue12","key13":"keyValue13","key14":"keyValue14","key15":"keyValue15"
},
{"id": "11040549","key1":"keyValue1","key2":"keyValue2","key3":"keyValue3","key4":"keyValue4","key5":"keyValue5","key6":"keyValue6","key7":"keyValue7","key8":"keyValue8","key9":"keyValue9","key10":"keyValue10","key11":"keyValue11","key12":"keyValue12","key13":"keyValue13","key14":"keyValue14","key15":"keyValue15"
},
....
{"id": "11040548","key1":"keyValue1","key2":"keyValue2","key3":"keyValue3","key4":"keyValue4","key5":"keyValue5","key6":"keyValue6","key7":"keyValue7","key8":"keyValue8","key9":"keyValue9","key10":"keyValue10","key11":"keyValue11","key12":"keyValue12","key13":"keyValue13","key14":"keyValue14","key15":"keyValue15"
}
]

我的JSON文件包含来自新闻网站的主题数据，而且几乎每天这个JSON文件都会急剧增加

用于解析我使用的文件

URL urlLinkSource = new URL(OUTBOX_URL);
urlLinkSourceReader = new BufferedReader(new InputStreamReader(
                        urlLinkSource.openStream(), "UTF-8"));
ObjectMapper mapper = new ObjectMapper();
List<DataContainerList> DataContainerListData = mapper.readValue(urlLinkSourceReader,new TypeReference<List<DataContainerList>>() { }); //DataContainerList contains id, key1, key2, key3..key15

我的问题是我想在这行中加载

List<DataContainerList> DataContainerListData = mapper.readValue(urlLinkSourceReader,new TypeReference<List<DataContainerList>>() { });

JSON对象的唯一范围-只有前十个对象，只有第二个十个对象-因为我需要在我的应用程序中以分页模式显示10条新闻（我一直知道需要显示哪10条新闻的索引）。加载10000个对象并只迭代其中的前10个对象，这完全是愚蠢的。所以我的问题是如何加载与此类似：

List<DataContainerList> DataContainerListData = mapper.readValue(urlLinkSourceReader,new TypeReference<List<DataContainerList>>() { });

只有索引从-TO（例如从30到40）的对象，而不加载整个JSON文件中的所有对象

问候

Python中文网

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java安卓使用Jackson库：如何加载索引范围从到的对象

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