如何使用spring boot从excel中读取数据并将其存储在mongodb中

我想开发一个代码，在这里我可以从excel中读取数据，并使用spring mvc spring boot将数据存储在mongodb中。另外，在我的项目中，我们已经分离了数据库层，所以我通过URL使用mongodb API。Mongodb托管在AWS上

---

我已尝试读取excel文件，但无法将其存储在mongodb中。您提供的相关数据非常少，这将使我们难以帮助您，但我尝试

要从excel中读取数据，需要在代码库中进行代码更改

将以下依赖项添加到pom.xml文件中

直接进入问题的商务部分，在课堂上写下以下内容

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.*;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;

public class ExcelReader {
    public static final String SAMPLE_XLSX_FILE_PATH = "./sample-xlsx-file.xlsx";

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

        // Creating a Workbook from an Excel file (.xls or .xlsx)
        Workbook workbook = WorkbookFactory.create(new File(SAMPLE_XLSX_FILE_PATH));

        // Retrieving the number of sheets in the Workbook
        System.out.println("Workbook has " + workbook.getNumberOfSheets() + " Sheets : ");

        /*
           =============================================================
           Iterating over all the sheets in the workbook (Multiple ways)
           =============================================================
        */

        // 1. You can obtain a sheetIterator and iterate over it
        Iterator<Sheet> sheetIterator = workbook.sheetIterator();
        System.out.println("Retrieving Sheets using Iterator");
        while (sheetIterator.hasNext()) {
            Sheet sheet = sheetIterator.next();
            System.out.println("=> " + sheet.getSheetName());
        }

        // 2. Or you can use a for-each loop
        System.out.println("Retrieving Sheets using for-each loop");
        for(Sheet sheet: workbook) {
            System.out.println("=> " + sheet.getSheetName());
        }

        // 3. Or you can use a Java 8 forEach with lambda
        System.out.println("Retrieving Sheets using Java 8 forEach with lambda");
        workbook.forEach(sheet -> {
            System.out.println("=> " + sheet.getSheetName());
        });

        /*
           ==================================================================
           Iterating over all the rows and columns in a Sheet (Multiple ways)
           ==================================================================
        */

        // Getting the Sheet at index zero
        Sheet sheet = workbook.getSheetAt(0);

        // Create a DataFormatter to format and get each cell's value as String
        DataFormatter dataFormatter = new DataFormatter();

        // 1. You can obtain a rowIterator and columnIterator and iterate over them
        System.out.println("\n\nIterating over Rows and Columns using Iterator\n");
        Iterator<Row> rowIterator = sheet.rowIterator();
        while (rowIterator.hasNext()) {
            Row row = rowIterator.next();

            // Now let's iterate over the columns of the current row
            Iterator<Cell> cellIterator = row.cellIterator();

            while (cellIterator.hasNext()) {
                Cell cell = cellIterator.next();
                String cellValue = dataFormatter.formatCellValue(cell);
                System.out.print(cellValue + "\t");
            }
            System.out.println();
        }

        // 2. Or you can use a for-each loop to iterate over the rows and columns
        System.out.println("\n\nIterating over Rows and Columns using for-each loop\n");
        for (Row row: sheet) {
            for(Cell cell: row) {
                String cellValue = dataFormatter.formatCellValue(cell);
                System.out.print(cellValue + "\t");
            }
            System.out.println();
        }

        // 3. Or you can use Java 8 forEach loop with lambda
        System.out.println("\n\nIterating over Rows and Columns using Java 8 forEach with lambda\n");
        sheet.forEach(row -> {
            row.forEach(cell -> {
                String cellValue = dataFormatter.formatCellValue(cell);
                System.out.print(cellValue + "\t");
            });
            System.out.println();
        });

        // Closing the workbook
        workbook.close();
    }
}

就这么叫吧

---

为了帮助我们向mongoDB添加相同的内容，您必须向我们提供更多信息。如果您需要上述代码中的任何帮助，请进行注释。

请显示您尝试过的内容。如果您尝试读取excel文件，但无法将其存储在mongodb中，那么您已经从excel读取了数据。那么，到底是什么阻碍了您将这些数据存储到数据库中呢？

compile "org.apache.poi:poi:3.17"
compile "org.apache.poi:poi-ooxml:3.17"

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.*;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;

public class ExcelReader {
    public static final String SAMPLE_XLSX_FILE_PATH = "./sample-xlsx-file.xlsx";

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

        // Creating a Workbook from an Excel file (.xls or .xlsx)
        Workbook workbook = WorkbookFactory.create(new File(SAMPLE_XLSX_FILE_PATH));

        // Retrieving the number of sheets in the Workbook
        System.out.println("Workbook has " + workbook.getNumberOfSheets() + " Sheets : ");

        /*
           =============================================================
           Iterating over all the sheets in the workbook (Multiple ways)
           =============================================================
        */

        // 1. You can obtain a sheetIterator and iterate over it
        Iterator<Sheet> sheetIterator = workbook.sheetIterator();
        System.out.println("Retrieving Sheets using Iterator");
        while (sheetIterator.hasNext()) {
            Sheet sheet = sheetIterator.next();
            System.out.println("=> " + sheet.getSheetName());
        }

        // 2. Or you can use a for-each loop
        System.out.println("Retrieving Sheets using for-each loop");
        for(Sheet sheet: workbook) {
            System.out.println("=> " + sheet.getSheetName());
        }

        // 3. Or you can use a Java 8 forEach with lambda
        System.out.println("Retrieving Sheets using Java 8 forEach with lambda");
        workbook.forEach(sheet -> {
            System.out.println("=> " + sheet.getSheetName());
        });

        /*
           ==================================================================
           Iterating over all the rows and columns in a Sheet (Multiple ways)
           ==================================================================
        */

        // Getting the Sheet at index zero
        Sheet sheet = workbook.getSheetAt(0);

        // Create a DataFormatter to format and get each cell's value as String
        DataFormatter dataFormatter = new DataFormatter();

        // 1. You can obtain a rowIterator and columnIterator and iterate over them
        System.out.println("\n\nIterating over Rows and Columns using Iterator\n");
        Iterator<Row> rowIterator = sheet.rowIterator();
        while (rowIterator.hasNext()) {
            Row row = rowIterator.next();

            // Now let's iterate over the columns of the current row
            Iterator<Cell> cellIterator = row.cellIterator();

            while (cellIterator.hasNext()) {
                Cell cell = cellIterator.next();
                String cellValue = dataFormatter.formatCellValue(cell);
                System.out.print(cellValue + "\t");
            }
            System.out.println();
        }

        // 2. Or you can use a for-each loop to iterate over the rows and columns
        System.out.println("\n\nIterating over Rows and Columns using for-each loop\n");
        for (Row row: sheet) {
            for(Cell cell: row) {
                String cellValue = dataFormatter.formatCellValue(cell);
                System.out.print(cellValue + "\t");
            }
            System.out.println();
        }

        // 3. Or you can use Java 8 forEach loop with lambda
        System.out.println("\n\nIterating over Rows and Columns using Java 8 forEach with lambda\n");
        sheet.forEach(row -> {
            row.forEach(cell -> {
                String cellValue = dataFormatter.formatCellValue(cell);
                System.out.print(cellValue + "\t");
            });
            System.out.println();
        });

        // Closing the workbook
        workbook.close();
    }
}

private static void printCellValue(Cell cell) {
    switch (cell.getCellTypeEnum()) {
        case BOOLEAN:
            System.out.print(cell.getBooleanCellValue());
            break;
        case STRING:
            System.out.print(cell.getRichStringCellValue().getString());
            break;
        case NUMERIC:
            if (DateUtil.isCellDateFormatted(cell)) {
                System.out.print(cell.getDateCellValue());
            } else {
                System.out.print(cell.getNumericCellValue());
            }
            break;
        case FORMULA:
            System.out.print(cell.getCellFormula());
            break;
        case BLANK:
            System.out.print("");
            break;
        default:
            System.out.print("");
    }

    System.out.print("\t");
}

sheet.forEach(row -> {
    row.forEach(cell -> {
        printCellValue(cell);
    });
    System.out.println();
});