我试图在here的帮助下在单页上设置页面方向，但没有运气。此代码片断会生成一个文档，但它只会将最后一页设置为横向。我无法弄清楚什么是错误的...任何帮助或指导，将不胜感激！

public static void main(String[] args) throws Exception {

XWPFDocument document = new XWPFDocument();

XWPFParagraph paragraph = document.createParagraph();

XWPFRun run = paragraph.createRun();

run.setText("FIRST PAGE");

changeOrientation(document, "landscape");

paragraph = document.createParagraph();

run = paragraph.createRun();

run.setText("SECOND PAGE");

changeOrientation(document, "portrait");

paragraph = document.createParagraph();

run = paragraph.createRun();

run.setText("THIRD PAGE");

changeOrientation(document, "landscape");

paragraph = document.createParagraph();

run = paragraph.createRun();

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