Java可以使用Apache POI庫來實(shí)現(xiàn)Excel數(shù)據(jù)刷新。具體步驟如下:
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.1.2</version>
</dependency>
FileInputStream
類將Excel文件加載到Workbook
對(duì)象中。例如:FileInputStream file = new FileInputStream(new File("path/to/excel.xlsx"));
Workbook workbook = new XSSFWorkbook(file); // 或者使用HSSFWorkbook類處理.xls文件
getSheet
方法獲取要刷新的工作表對(duì)象,使用getRow
和getCell
方法獲取要刷新的單元格對(duì)象。例如:Sheet sheet = workbook.getSheet("Sheet1");
Row row = sheet.getRow(0);
Cell cell = row.getCell(0);
setCellValue
方法設(shè)置單元格的新值。例如:cell.setCellValue("New Value");
FileOutputStream
類將更新后的Workbook
對(duì)象保存到Excel文件中,然后關(guān)閉文件流。例如:FileOutputStream fileOut = new FileOutputStream("path/to/excel.xlsx");
workbook.write(fileOut);
fileOut.close();
完整的示例代碼如下:
import org.apache.poi.ss.usermodel.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class ExcelRefreshExample {
public static void main(String[] args) throws IOException {
FileInputStream file = new FileInputStream(new File("path/to/excel.xlsx"));
Workbook workbook = new XSSFWorkbook(file);
Sheet sheet = workbook.getSheet("Sheet1");
Row row = sheet.getRow(0);
Cell cell = row.getCell(0);
cell.setCellValue("New Value");
FileOutputStream fileOut = new FileOutputStream("path/to/excel.xlsx");
workbook.write(fileOut);
fileOut.close();
}
}
注意:以上示例代碼只是演示了如何實(shí)現(xiàn)Excel數(shù)據(jù)刷新的基本步驟。實(shí)際應(yīng)用中可能需要更復(fù)雜的邏輯來處理不同的Excel文件和數(shù)據(jù)。