使用POI生成单词时参数不正确

Question

我试图使用apache POI在单词doc中绘制jFreeChart，但我无法做到这一点。这就是我所做的我不知道哪个api我必须正确使用某人请求助于我现在所做的事情，

      JFreeChart TotalActivityChart = ChartFactory.createBarChart("Total Activities", "Activities", "#Candidate", bar_chart_servlet, PlotOrientation.VERTICAL, false, true, false);

        /**---------------------------------- Appearance of chart for Total Activity------------------------------------ */
        // Adjust appearance (optional)
        TotalActivityChart.getTitle().setPaint(Color.BLACK);
        TotalActivityChart.setAntiAlias(true);
        CategoryPlot plot = (CategoryPlot) TotalActivityChart.getPlot();
        plot.setBackgroundPaint(new GradientPaint(0, 0, Color.DARK_GRAY, 0, 100, Color.GRAY));
        // set the range axis to display integers only...
        final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        final CategoryItemRenderer renderer = new CustomRenderer(new Paint[] { new Color(0x3D59AB), new Color(0x009ACD), new Color(0x104E8B), new Color(0x50A6C2) });
        plot.setRenderer(renderer);
        /**--------------------------------------- End of Appearance of Chart--------------------------------------- */
        int width = 800;
        int height = 240;
        ByteArrayOutputStream chart_out = new ByteArrayOutputStream();
        ChartUtilities.writeChartAsPNG(chart_out, TotalActivityChart, width, height);
        String pictureIdx = document.addPictureData(chart_out.toByteArray(), Workbook.PICTURE_TYPE_PNG);
        chart_out.close();
    int width = 800;
        int height = 240;
        ByteArrayOutputStream chart_out = new ByteArrayOutputStream();

        ChartUtilities.writeChartAsPNG(chart_out, TotalActivityChart, width, height);
        String pictureIdx = document.addPictureData(chart_out.toByteArray(), document.PICTURE_TYPE_PNG);
        //document.createParagraph().createRun().addPicture(chart_out, Document.PICTURE_TYPE_PNG,"my pic", Units.toEMU(200), Units.toEMU(200) );
        chart_out.close();



        run.addPicture(new FileInputStream(pictureIdx), Document.PICTURE_TYPE_PNG, pictureIdx, Units.toEMU(200), Units.toEMU(200));


        // Setup the output
        String contentType="application/msword";
        response.addHeader("Content-Disposition", "attachment; filename=\""+ "reportName" + ".docx\"");
        response.setContentType(contentType);
        ServletOutputStream out = response.getOutputStream();           
        document.write(out);

任何人都可以建议如何在该单词doc中添加图片。提前谢谢

Answer 1

你的问题就在这里：

ByteArrayOutputStream chart_out = new ByteArrayOutputStream();

ChartUtilities.writeChartAsPNG(chart_out, TotalActivityChart, width, height);
String pictureIdx = document.addPictureData(chart_out.toByteArray(), document.PICTURE_TYPE_PNG);
//document.createParagraph().createRun().addPicture(chart_out, Document.PICTURE_TYPE_PNG,"my pic", Units.toEMU(200), Units.toEMU(200) );
chart_out.close();

run.addPicture(new FileInputStream(pictureIdx), Document.PICTURE_TYPE_PNG, pictureIdx, Units.toEMU(200), Units.toEMU(200));

您正在将图表图片写入字节数组，但之后尝试将一些随机文件添加到Word文档中，这永远不会起作用！

相反，将图表图片传递给word文档，这应该没问题，例如：

ByteArrayOutputStream chart_out = new ByteArrayOutputStream();

ChartUtilities.writeChartAsPNG(chart_out, TotalActivityChart, width, height);
String pictureIdx = document.addPictureData(chart_out.toByteArray(), document.PICTURE_TYPE_PNG);
//document.createParagraph().createRun().addPicture(chart_out, Document.PICTURE_TYPE_PNG,"my pic", Units.toEMU(200), Units.toEMU(200) );
chart_out.close();

byte[] chartPicture = chart_out.toByteArray();

run.addPicture(new ByteArrayInputStream(chartPicture), Document.PICTURE_TYPE_PNG, pictureIdx, Units.toEMU(200), Units.toEMU(200));

这里的区别在于，在捕获图片的字节后，然后将这些相同的字节提供给POI以添加到您的文档中。你需要自己提供图片，否则它将不起作用！

Answer 2

我也遇到了同样的问题，我将poi版本从3.9更改为4.0.1 而且有效。