Java は Excel での数式の作成と読み取りを実装します。

import com.spire.xls.*;

public class AddFormula {
    public static void main(String[] args) {
        //创建Workbook对象
        Workbook wb = new Workbook();

        //获取第一个工作表
        Worksheet sheet = wb.getWorksheets().get(0);

        //声明两个变量
        int currentRow = 1;
        String currentFormula = null;

        //设置列宽
        sheet.setColumnWidth(1, 32);
        sheet.setColumnWidth(2, 16);

        //写入用于测试的数据到单元格
        sheet.getCellRange(currentRow,1).setValue("测试数据：");
        sheet.getCellRange(currentRow,2).setNumberValue(1);
        sheet.getCellRange(currentRow,3).setNumberValue(2);
        sheet.getCellRange(currentRow,4).setNumberValue(3);
        sheet.getCellRange(currentRow,5).setNumberValue(4);
        sheet.getCellRange(currentRow,6).setNumberValue(5);

        //写入文本
        currentRow += 2;
        sheet.getCellRange(currentRow,1).setValue("公式：") ; ;
        sheet.getCellRange(currentRow,2).setValue("结果：");

        //设置单元格格式
        CellRange range = sheet.getCellRange(currentRow,1,currentRow,2);
        range.getStyle().getFont().isBold(true);
        range.getStyle().setKnownColor(ExcelColors.LightGreen1);
        range.getStyle().setFillPattern(ExcelPatternType.Solid);
        range.getStyle().getBorders().getByBordersLineType(BordersLineType.EdgeBottom).setLineStyle(LineStyleType.Medium);

        //算数运算
        currentFormula = "=1/2+3*4";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //日期函数
        currentFormula = "=TODAY()";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);
        sheet.getCellRange(currentRow,2).getStyle().setNumberFormat("YYYY/MM/DD");

        //时间函数
        currentFormula = "=NOW()";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);
        sheet.getCellRange(currentRow,2).getStyle().setNumberFormat("H:MM AM/PM");

        //IF函数
        currentFormula = "=IF(B1=5,\"Yes\",\"No\")";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //PI函数
        currentFormula = "=PI()";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //三角函数
        currentFormula = "=SIN(PI()/6)";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //计数函数
        currentFormula = "=Count(B1:F1)";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //最大值函数
        currentFormula = "=MAX(B1:F1)";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //平均值函数
        currentFormula = "=AVERAGE(B1:F1)";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //求和函数
        currentFormula = "=SUM(B1:F1)";
        sheet.getCellRange(++currentRow,1).setText(currentFormula);
        sheet.getCellRange(currentRow,2).setFormula(currentFormula);

        //保存文档
        wb.saveToFile("AddFormulas.xlsx",FileFormat.Version2013);
        wb.dispose();
    }
}

import com.spire.xls.*;

public class ReadFormula {
    public static void main(String[] args) {
        //加载Excel文档
        Workbook wb = new Workbook();
        wb.loadFromFile("AddFormulas.xlsx");

        //获取第一个工作表
        Worksheet sheet = wb.getWorksheets().get(0);

        //遍历B1到B13的单元格
        for (Object cell: sheet.getCellRange("B1:B13"))
        {
            CellRange cellRange = (CellRange)cell;

            //判断单元格是否含有公式
            if (cellRange.hasFormula())
            {
                //打印单元格及公式
                String certainCell = String.format("单元格[%d, %d]含有公式：", cellRange.getRow(), cellRange.getColumn());
                System.out.println(certainCell + cellRange.getFormula());
            }
        }
    }
}