java - 使用 XWPFDocument 将文本附加到现有 Word 文件

Question

我正在尝试将文本和屏幕截图附加到现有的 Word 文件中。但每次执行以下代码时，我都会收到错误:

org.apache.poi.EmptyFileException: The supplied file was empty (zero bytes long) at org.apache.poi.util.IOUtils.peekFirstNBytes(IOUtils.java:74) at org.apache.poi.util.IOUtils.peekFirst8Bytes(IOUtils.java:57) at org.apache.poi.poifs.filesystem.FileMagic.valueOf(FileMagic.java:135) at org.apache.poi.openxml4j.opc.internal.ZipHelper.verifyZipHeader(ZipHelper.java:175) at org.apache.poi.openxml4j.opc.internal.ZipHelper.openZipStream(ZipHelper.java:209) at org.apache.poi.openxml4j.opc.ZipPackage.(ZipPackage.java:98) at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:324) at org.apache.poi.util.PackageHelper.open(PackageHelper.java:37) at org.apache.poi.xwpf.usermodel.XWPFDocument.(XWPFDocument.java:116) at test.tester.(tester.java:44) at test.tester.main(tester.java:100)

创建文件失败，先获取 ss

java.lang.NullPointerException at test.tester.setText(tester.java:62) at test.tester.main(tester.java:103)

代码如下:

 public class tester{

    FileOutputStream fos = null;
    XWPFDocument doc = null;
    // create para and run
    XWPFParagraph para = null;
    XWPFRun run = null;

    File file = null;

    public tester() {
        try {

            file = new File("WordDocWithImage.docx");

            writeToWord();
            //doc = new XWPFDocument();
            doc = new XWPFDocument(OPCPackage.open(file));
            //doc = new XWPFDocument(new FileInputStream("WordDocWithImage.docx"));
            para = doc.createParagraph();
            run = para.createRun();
            para.setAlignment(ParagraphAlignment.CENTER);
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("failed to create file");
        }
    }

    public FileOutputStream writeToWord() throws FileNotFoundException {
        fos = new FileOutputStream("WordDocWithImage.docx");
        return fos;

    }

    public void setText(String text) {

        run.setText(text);
    }

    public void takeScreenshot() throws IOException, AWTException, InvalidFormatException {

        // Take screenshot
        Robot robot = new Robot();
        Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
        BufferedImage screenFullImage = robot.createScreenCapture(screenRect);

        // convert buffered image to Input Stream
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ImageIO.write(screenFullImage, "jpeg", baos);
        baos.flush();
        ByteArrayInputStream bis = new ByteArrayInputStream(baos.toByteArray());
        baos.close();

        // add image to word doc
        run.addBreak();
        run.addPicture(bis, XWPFDocument.PICTURE_TYPE_JPEG, "image file", Units.toEMU(450), Units.toEMU(250)); // 200x200
                                                                                                                // pixels
        bis.close();

    }

    public void writeToFile() {
        try {
            // write word doc to file

            doc.write(fos);
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {

        tester t = new tester();
        try {
            System.out.println("Taking first ss");
            t.setText("First Text");
            t.takeScreenshot();
            System.out.println("Taking second ss");
            t.setText("Second Text");
            t.takeScreenshot();
            t.writeToFile();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    }

请帮忙。

Answer 1

The supplied file was empty (zero bytes long)

问题在于获取此行中的 WordDocWithImage 文件。

file = new File("WordDocWithImage.docx"); 

找不到 docx 文件。您应该检查文件的位置并给出其中的真实路径。

编辑:您需要将outputStream更改为不同的位置。您可以创建一个子文件夹。我让 ss 尝试这个。

public FileOutputStream writeToWord() throws FileNotFoundException {
        fos = new FileOutputStream("path/subFolder/WordDocWithImage.docx");
        return fos;

    }

注意:我已经尝试过该代码。