首先,请注意今天是我第一天GSON
。我正在尝试使用编写 Json 文件GSON
图书馆。我有几千个JsonObjects
里面一个ArrayList
。当写入 Json 文件时,它应该看起来与此类似。
[
{
"hash_index": "00102x05h06l0aj0dw",
"body": "Who's signing up for Obamacare?",
"_type": "ArticleItem",
"title": "Who's signing up for Obamacare? - Jan. 13, 2014",
"source": "money.cnn.com",
"primary_key": 0,
"last_crawl_date": "2014-01-14",
"url": "http://money.cnn.com/2014/01/13/news/economy/obamacare-enrollment/index.html"
},
{
"hash_index": "00102x05h06l0aj0dw0iz0kn0l@0t#0",
"body": "Who's signing up for Obamacare?",
"_type": "ArticleItem",
"title": "Who's signing up for Obamacare? - Jan. 13, 2014",
"source": "money.cnn.com",
"primary_key": 1,
"last_crawl_date": "2014-01-14",
"url": "http://money.cnn.com/2014/01/13/news/economy/obamacare-enrollment/index.html"
}
]
现在,我使用以下代码编写 JSOn。
private void writeNewJsonFile() throws IOException
{
System.out.println("Starting to write the JSON File");
//Add everything into a JSONArray
JsonArray jsonArrayNew = new JsonArray();
for(int i=0;i<jsonObjectHolder.size();i++)
{
System.out.println("inside array");
jsonArrayNew.add(jsonObjectHolder.get(i));
}
//Write it to the File
/* File file= new File("items_Articles_4_1.json");
FileWriter fw = new FileWriter(file);;
fw.write(jsonArrayNew.toString());
fw.flush();
fw.close();*/
System.out.println("outside array");
ByteArrayInputStream input = new ByteArrayInputStream(jsonArrayNew.toString().getBytes());
Long contentLength = Long.valueOf(jsonArrayNew.toString().getBytes().length);
ObjectMetadata metaData = new ObjectMetadata();
metaData.setContentLength(contentLength);
s3.putObject(outputBucket,outputFile,input,metaData);
}
这里我正在转换JsonArray
into a String
并进行写作。我担心这很快就会与 Big Json 数组崩溃并给我OutOfMemoryException
。就像我使用GSON逐段读取Json文件一样,有什么方法可以让我逐段写入Json文件什么的,这样可以避免OutOfMemoryException
问题?