Question

尝试以下列文档格式将Excel数据导入Mongo数据库

[
{"productId":"",
"programeName":"",
"programeThumbImageURL":"",
"programeURL":"",
"programEditors":["editor1","editor2"],
"programChapters":[
{
"chapterName":"chapter1",
"authorNames":["authorName1","authorname2"]
},
{"chapterName":"chapter2"},
"authorNames":["authorName1","authorName2"]
}
,...
]},...]

Excel中有许多产品，chapterNames有多个作者。以下是尝试执行的代码，我可以插入数据。但是我无法合并与上面特定chapterName相对应的authorNames。所以目前有programChapters数组包含对象作为重复的chapterNames。以下代码显示了我的实验。

private static XSSFWorkbook myWorkBook;

public static void main(String[] args) throws IOException {

String[] programs = {"programName1","programName2","programName3","programName4",...};

@SuppressWarnings("deprecation")
Mongo mongo = new Mongo("localhost", 27017);
@SuppressWarnings("deprecation")
DB db = mongo.getDB("dbName");

DBCollection collection = db.getCollection("programsCollection");

File myFile =
    new File("dsm_article_author_details.xlsx");
FileInputStream fis = new FileInputStream(myFile); // Finds the workbook instance for XLSX file
myWorkBook = new XSSFWorkbook(fis);
XSSFSheet mySheet = myWorkBook.getSheetAt(0); // Get iterator to all the rows in current sheet

@SuppressWarnings("unused")
Iterator<Row> rowIterator = mySheet.iterator(); // Traversing over each row of XLSX file
for (String program : programs) {
  String programName = "";
  String chapterName = "";
  String authorName = "";

  BasicDBObject product = new BasicDBObject();

  BasicDBList programChaptersList = new BasicDBList();
  // For Each Row , Create Chapters Object here

  for (int i = 0; i <= mySheet.getLastRowNum(); i++) { // points to the starting of excel i.e
                                                       // excel first row
    Row row = (Row) mySheet.getRow(i); // sheet number
    System.out.println("Row is :" + row.getRowNum());

    BasicDBObject programChapters = new BasicDBObject();
    if (row.getCell(0).getCellType() == Cell.CELL_TYPE_STRING) {
      programName = row.getCell(0).getStringCellValue();
      System.out.println("programName : " + programName);
    }

    if (row.getCell(1).getCellType() == Cell.CELL_TYPE_STRING) {
      chapterName = row.getCell(1).getStringCellValue().replaceAll("\n", "");
      System.out.println("chapterName : " + chapterName);
    }

    if (row.getCell(2).getCellType() == Cell.CELL_TYPE_STRING) {
      authorName = row.getCell(2).getStringCellValue();
      System.out.println("authorName : " + authorName);
    }

    List<String> authors = new ArrayList<String>();

    programChapters.put("chapterName", chapterName);

    authors.add(authorName);
    programChapters.put("authorName", authors);

    if (programName.trim().equals(program.trim())) {
      programChaptersList.add(programChapters);
    }
  }

  product.put("programName", program);
  product.put("programThumbImageURL", "");
  product.put("programeURL", "");
  product.put("programChapters", programChaptersList);

  collection.insert(product);
  System.out.println("*#*#*#*#*#");
}
}

我希望这是出错的部分。需要将所有chapterNames存储在一个数组中，并与每个即将到来的值进行比较，并根据这些值创建新对象并将其存储在列表中

List<String> authors = new ArrayList<String>();

programChapters.put("chapterName", chapterName);

authors.add(authorName);
programChapters.put("authorName", authors);

有人可以建议我，可用的解决方案： - ）

Answer 1

我希望这是出错的部分。需要将所有chapterNames存储在一个数组中，并与每个即将到来的值进行比较，并根据这些值创建新对象并将其存储在列表中

List<String> authors = new ArrayList<String>();

programChapters.put("chapterName", chapterName);

authors.add(authorName);
programChapters.put("authorName", authors);

使用Java将Excel数据导入Mongodb

1 个答案: