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嗨,下面是我的代碼來提取特定的元數據標籤並將這些標籤寫入json文件。我將json.lib.jar和tika-app.jar導入到我的構建路徑中。使用java將輸出值寫入json文件
File dir = new File("C:/pdffiles");
File listDir[] = dir.listFiles();
for (int i = 0; i < listDir.length; i++)
{
System.out.println("files"+listDir.length);
String file=listDir[i].toString();
File file1 = new File(file);
InputStream input = new FileInputStream(file1);
Metadata metadata = new Metadata();
BodyContentHandler handler = new BodyContentHandler(10*1024*1024);
AutoDetectParser parser = new AutoDetectParser();
parser.parse(input, handler, metadata);
Map<String, String> map = new HashMap<String, String>();
map.put("File name: ", listDir[i].getName());
map.put("Title: " , metadata.get("title"));
map.put("Author: " , metadata.get("Author"));
map.put("Content type: " , metadata.get("Content-Type"));
JSONObject json = new JSONObject();
json.accumulateAll(map);
FileWriter file2;
file2 = new FileWriter("C:\\test.json");
file2.write(json.toString());
file2.flush();
}
但它只寫入單個文件元數據到json文件。我的代碼有什麼問題,請給我建議。