如何使用apache poi在docx中计算=SUM(上面)函数

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.2</version>
</dependency>

XWPFDocument document = new XWPFDocument();

XWPFParagraph paragraph = document.createParagraph();

XWPFRun run = paragraph.createRun();
run.setText("=SUM(ABOVE)");

FileOutputStream out = new FileOutputStream("output.docx");
document.write(out);
out.close();