Java代码实现Excel文件的导入,并且记录导入成功多少条,导入失败多少条,导入失败的数据记录在文件中

可以使用 Apache POI 库来实现 Java 代码导入 Excel 文件，记录导入成功和失败的条目数。具体步骤如下：

1. 引入 Apache POI 的依赖。

2. 读取 Excel 文件，遍历每一行数据。

3. 对于每一行数据，进行相应的数据处理，如类型转换等。

4. 对于处理后的数据，进行业务逻辑判断，判断是否满足导入条件。

5. 记录导入成功和失败的条目数。

6. 对于导入失败的数据，将其记录在文件中。

下面是一个示例代码：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelImportExample {

    public static void main(String[] args) {
        String excelFilePath = "path/to/excel/file";
        String failedDataFile = "path/to/failed/data/file";
        int successCount = 0, failedCount = 0;
        List<String> failedData = new ArrayList<>();

        try (FileInputStream inputStream = new FileInputStream(new File(excelFilePath))) {
            Workbook workbook = new XSSFWorkbook(inputStream);
            Sheet sheet = workbook.getSheetAt(0);
            Iterator<Row> iterator = sheet.iterator();

            while (iterator.hasNext()) {
                Row currentRow = iterator.next();
                Iterator<Cell> cellIterator = currentRow.iterator();

                // read data from cells and process
                // ...

                if (isDataValid(data)) {
                    // import data
                    successCount++;
                } else {
                    // record failed data
                    failedData.add(data);
                    failedCount++;
                }
            }

            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // write failed data to file
        try (FileOutputStream outputStream = new FileOutputStream(new File(failedDataFile))) {
            for (String data : failedData) {
                outputStream.write(data.getBytes());
                outputStream.write(System.lineSeparator().getBytes());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.out.println("Import finished: " + successCount + " records imported successfully, " + failedCount + " records failed to import.");
    }

    private static boolean isDataValid(Data data) {
        // perform necessary validation checks
        // ...
    }
}