首页 > 解决方案 > 将 Excel 中的每个单元格数据转换为 XML 以存储到 DB

问题描述

在寻找一些资源后,我可以加载一个包含 1.000.000 行数据的 Excel 文件。但是,我不知道如何获取每个数据。到目前为止,这是我的代码...

public void create(MultipartFile file) throws Exception {
    try {
        InputStream fileStream = new BufferedInputStream(file.getInputStream());
        OPCPackage opc = OPCPackage.open(fileStream);
        XSSFReader xssf = new XSSFReader(opc);
        SharedStringsTable sst = xssf.getSharedStringsTable();
        XSSFReader.SheetIterator itr = (XSSFReader.SheetIterator)xssf.getSheetData();

// I just realize, if I running below for-loop,
// this only print strings and in random order, not in the same order as the excel file.
// 20 is just an example

        for (int i = 0; i < 20; i++) {
            System.out.println(sst.getEntryAt(i).getT().toString());
        }

        while (itr.hasNext()) {
            InputStream is = itr.next();
            if (itr.getSheetName().equals("MY_SHEET_NAME")) {
                while ("data is avaiable, this is just example, I'll use something like hasNext() for the row in the sheet, but I dont know how to do it" != null) {
                    // Want to process and get all data in each cells, then store to DB
                    // What I did not know, is how to get data in each cells
                }
            } else {
                throw new Exception("Sheet not found");
            }
        }
    } catch (Exception e) {
        throw new Exception("Error is: " + e.getMessage());
    } finally {
        if (is != null) {
            is.close();
        }

        if (opc != null){
            opc.close();
        }

        if (fileStream != null) {
            fileStream.close();
        }
    }
}

我试图在这里查看处理工作表,但我没有得到如何获取每个单元格中的数据。任何帮助都会真正帮助我..

更新

如果我从链接中阅读了 apache POI 的文档,这里将处理我的 excel 的代码部分:

public void processOneSheet(String filename) throws Exception {
        OPCPackage pkg = OPCPackage.open(filename);
        XSSFReader r = new XSSFReader( pkg );
        SharedStringsTable sst = r.getSharedStringsTable();

        XMLReader parser = fetchSheetParser(sst);

        // To look up the Sheet Name / Sheet Order / rID,
        //  you need to process the core Workbook stream.
        // Normally it's of the form rId# or rSheet#
        InputStream sheet2 = r.getSheet("rId2");
        InputSource sheetSource = new InputSource(sheet2);
        parser.parse(sheetSource);
        sheet2.close();
    }

但是,在 call 之后parser.parse(sheetSource),我如何从每一行和每一列中获取每个数据?因为我想对每个单元格上的每个数据进行验证,然后将其存储到数据库中。

更新 2 我尝试使用这个答案,https://stackoverflow.com/a/51818500/10454516。我可以获取数据,我尝试插入 myObjectRepo.save(result) 或 myObjectRepo.save(myObject),我都将代码放在 void endRow 方法中,并且我也尝试将它放在 switch 之后但在 if( lineNumber > 0),但它总是返回 NullPointerException。但是如果我没有调用 save 方法,我尝试在控制台中打印结果,结果被打印出来。

标签: javaexcelspring-bootapache-poixssf

解决方案


您可以获取 excel 数据的一种方法是:

try {
        InputStream excelFile = new FileInputStream(mFileName); 
        XSSFWorkbook wb = new XSSFWorkbook(excelFile);
        XSSFSheet sheet = wb.getSheetAt(0);
        XSSFRow row;
        XSSFCell cell;

        Iterator<Row> rows = sheet.rowIterator();

        int col = 0, colPR = 1;
        int pageRank = 0;
        String url = null;

        while (rows.hasNext()) {
            row = (XSSFRow) rows.next();
            url = row.getCell(col).getStringCellValue();

            System.out.println("--------------------------");
        }

        FileOutputStream out = new FileOutputStream(mFileName);
        wb.write(out);
        out.flush();
        out.close();
    }
    catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

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