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>