Java如何获取Excel的单元格数据类型?

在此示例中,我们尝试获取Excel的单元格数据类型,以便我们可以使用正确的方法读取该值。要读取的数据在名为的文件中celltype.xls。下面的矩阵描述了文件的状态。

    |   COL
ROW |   0       1   2   3   4
----|-------------------------
0   |   1       2   A   B   TRUE
1   |   FALSE   X   Y   Z   10
package org.nhooo.example.poi;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.CellType;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Iterator;

public class ObtainingCellType {

    public static void main(String[] args) throws Exception {
        String filename = "celltype.xls";

        try (FileInputStream fis = new FileInputStream(filename)) {
            HSSFWorkbook workbook = new HSSFWorkbook(fis);
            HSSFSheet sheet = workbook.getSheetAt(0);

            Iterator rows = sheet.rowIterator();
            while (rows.hasNext()) {
                HSSFRow row = (HSSFRow) rows.next();
                Iterator cells = row.cellIterator();
                while (cells.hasNext()) {
                    HSSFCell cell = (HSSFCell) cells.next();

                    CellType type = cell.getCellType();
                    if (type == CellType.STRING) {
                        System.out.println("[" + cell.getRowIndex() + ", "
                            + cell.getColumnIndex() + "] = STRING; Value = "
                            + cell.getRichStringCellValue().toString());
                    } else if (type == CellType.NUMERIC) {
                        System.out.println("[" + cell.getRowIndex() + ", "
                            + cell.getColumnIndex() + "] = NUMERIC; Value = "
                            + cell.getNumericCellValue());
                    } else if (type == CellType.BOOLEAN) {
                        System.out.println("[" + cell.getRowIndex() + ", "
                            + cell.getColumnIndex() + "] = BOOLEAN; Value = "
                            + cell.getBooleanCellValue());
                    } else if (type == CellType.BLANK) {
                        System.out.println("[" + cell.getRowIndex() + ", "
                            + cell.getColumnIndex() + "] = BLANK CELL");
                    }
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

我们的程序迭代Excel文件的行和单元格,并产生以下
输出:

[0, 0] = NUMERIC; Value = 1.0
[0, 1] = NUMERIC; Value = 2.0
[0, 2] = STRING; Value = A
[0, 3] = STRING; Value = B
[0, 4] = BOOLEAN; Value = true
[1, 0] = BOOLEAN; Value = false
[1, 1] = STRING; Value = X
[1, 2] = STRING; Value = Y
[1, 3] = STRING; Value = Z
[1, 4] = NUMERIC; Value = 10.0

Maven依赖

<!-- https://search.maven.org/remotecontent?filepath=org/apache/poi/poi/4.1.0/poi-4.1.0.jar -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.0</version>
</dependency>

Maven中央