apache或docx4j中的SUM(上面)功能

import org.apache.poi.ss.usermodel.*;

public class ApachePOIExample {
    public static void main(String[] args) {
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet("Sheet1");

        // 创建数据
        for (int i = 0; i < 5; i++) {
            Row row = sheet.createRow(i);
            for (int j = 0; j < 5; j++) {
                Cell cell = row.createCell(j);
                cell.setCellValue(i * j);
            }
        }

        // 计算SUM（上面）
        int rowIndex = 3; // 需要计算SUM（上面）的单元格所在的行索引
        int columnIndex = 2; // 需要计算SUM（上面）的单元格所在的列索引

        FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();
        Cell cell = sheet.getRow(rowIndex).createCell(columnIndex);
        cell.setCellFormula("SUM(A" + (rowIndex + 1) + ":A" + rowIndex + ")"); // SUM（上面）公式

        // 计算公式结果
        evaluator.evaluateFormulaCell(cell);

        // 获取计算结果
        double result = cell.getNumericCellValue();
        System.out.println("SUM（上面）的结果为：" + result);
    }
}

import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.WordprocessingML.MainDocumentPart;
import org.docx4j.wml.*;

import javax.xml.bind.JAXBElement;
import java.math.BigInteger;

public class Docx4jExample {
    public static void main(String[] args) throws Exception {
        WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.createPackage();
        MainDocumentPart mainDocumentPart = wordMLPackage.getMainDocumentPart();

        // 创建表格
        Tbl table = factory.createTbl();
        mainDocumentPart.addObject(table);

        // 创建行和单元格
        for (int i = 0; i < 5; i++) {
            Tr row = factory.createTr();
            table.getContent().add(row);

            for (int j = 0; j < 5; j++) {
                Tc cell = factory.createTc();
                row.getContent().add(cell);

                P paragraph = factory.createP();
                cell.getContent().add(paragraph);

                Text text = factory.createText();
                text.setValue(String.valueOf(i * j));
                paragraph.getContent().add(text);
            }
        }

        // 计算SUM（上面）
        int rowIndex = 3; // 需要计算SUM（上面）的单元格所在的行索引
        int columnIndex = 2; // 需要计算SUM（上面）的单元格所在的列索引

        Tr targetRow = (Tr) table.getContent().get(rowIndex);
        Tc targetCell = (Tc) targetRow.getContent().get(columnIndex);

        P formulaParagraph = factory.createP();
        targetCell.getContent().add(formulaParagraph);

        R formulaRun = factory.createR();
        formulaParagraph.getContent().add(formulaRun);

        Text formulaText = factory.createText();
        formulaText.setValue("SUM(ABOVE)"); // SUM（上面）公式
        formulaRun.getContent().add(factory.createRInstrText(formulaText));

        // 更新公式
        mainDocumentPart.variableReplace(new HashMap<String, String>() {{
            put("ABOVE", "ABOVE");
        }});

        // 获取计算结果
        BigInteger result = (BigInteger) ((JAXBElement) targetCell.getContent().get(0)).getValue();
        System.out.println("SUM（上面）的结果为：" + result);
    }
}