用poi的XSLF创建ppt，添加文本的时候多了空行

poi版本3.14.

根据poi的demo写了个简单的生成ppt的例子：

    public static void makePpt(String path) throws Exception {
        if (path == null) {
            path = "e:/text.pptx";
        }
        XMLSlideShow ppt = new XMLSlideShow();

        XSLFSlide slide1 = ppt.createSlide();
        XSLFTextBox shape1 = slide1.createTextBox();
        Rectangle anchor = new Rectangle(10, 100, 300, 100);
        shape1.setAnchor(anchor);
        XSLFTextParagraph p1 = shape1.addNewTextParagraph();
        XSLFTextRun r1 = p1.addNewTextRun();
        r1.setFontColor(new Color(0, 200, 160));
        shape1.setFillColor(Color.red);
        r1.setText("text1");

        XSLFTextBox shape2 = slide1.createTextBox();
        Rectangle anchor2 = new Rectangle(210, 200, 300, 100);
        shape2.setAnchor(anchor2);
        shape2.setText("text2");

        FileOutputStream out = new FileOutputStream(path);
        ppt.write(out);
        out.close();

        ppt.close();
    }

发现text1的文本框多了一个空行。text2文本框没有多空行。

使用如下代码看看到底生成了什么东西：

    public static void readPpt() throws Exception {
        XMLSlideShow ppt = new XMLSlideShow(new FileInputStream("e:/text.pptx"));
        XSLFSlide slide1 = ppt.getSlides().get(0);
        for (XSLFShape shape : slide1.getShapes()) {
            if (shape instanceof XSLFTextBox) {
                XSLFTextBox box = (XSLFTextBox) shape;
                java.util.List ps = box.getTextParagraphs();
                if (ps.size() > 0) {
                    java.util.List rs = ps.get(0).getTextRuns();
                    if (!rs.isEmpty()) {
                        System.out.println(rs.get(0).getRawText());
                    }
                }
            }
        }
    }

发现shape1的那个XSLFTextBox其实有两个XSLFTextParagraph对象。

查看相应的代码，问题应该是出在XSLFTextParagraph p1 = shape1.addNewTextParagraph();这一句。原因应该是XSLFTextBox本身就有一个TextParagraph了。

这一行代码改成：

        XSLFTextParagraph p1 =shape1.getTextParagraphs().isEmpty() ?
                shape1.addNewTextParagraph() : shape1.getTextParagraphs().get(0);

就可以了。