JFreeChart奇怪渲染(无头RedHat)

时间:2012-08-01 15:47:40

标签: jfreechart redhat

我目前正在将应用程序从Windows环境迁移到Redhat。此应用程序正在使用JfreeChart 1.0.6。它是在Open-JDK6上运行的Redhat无头环境中的tomcat 7中部署的Web应用程序。

我获得了以下PNG。它看起来像是一个手写的图表,一切都转移到了图像的顶部。

有人已经遇到过这样的问题并得到了修复吗?

请参阅下面的图表:

image http://img194.imageshack.us/img194/4489/graph20120801105017.png

见下面生成图表的代码:

FacesContext facesContext = FacesContext.getCurrentInstance();
    ServletContext servlet = (ServletContext)facesContext.getExternalContext().getContext();
    HttpServletRequest request = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();
    String path = null;

    if (null != servlet.getRealPath("/"))
    {
        path = servlet.getRealPath("/");
    }
    else
    {
        path = servlet.getResource("/").getPath();
    }

    File stockageImg = new File(path+Constants.CHEMIN_GRAPH+CM50Util.dateHeureJour()+Constants.EXTENSION_GRAPH);

    ChartRenderingInfo info = new ChartRenderingInfo (new StandardEntityCollection());
    DefaultXYDataset dataset = new DefaultXYDataset();
    XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true, false);

    try 
    {
        dataset.addSeries("CM moyen Annuel", courbeRef);
        dataset.addSeries("CM non dépassé plus de 5% du temps", courbe95);

        //creation du graphique
        JFreeChart chart = ChartFactory.createXYLineChart(
             "Courbes de décroissance",
             "Distance en m\u00E8tre",
             "Champ",
             dataset,
             PlotOrientation.VERTICAL,
             true,
             false,
             false);

        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setRenderer(renderer);

        IntervalMarker intervalIncertitude = new IntervalMarker(Double.parseDouble(resultDistanceMin.replace(Constants.UNITE_DISTANCE, "")), Double.parseDouble(resultDistanceMax.replace(Constants.UNITE_DISTANCE, "")));
        intervalIncertitude.setPaint(new Color(222, 222, 255, 128));
        plot.addDomainMarker(intervalIncertitude, Layer.BACKGROUND);

        Marker distanceTiers = new ValueMarker(Double.parseDouble(resultDistance.replace(Constants.UNITE_DISTANCE, "")));
        distanceTiers.setPaint(Color.BLACK);
        plot.addDomainMarker(distanceTiers);

        renderer.setSeriesPaint(0, Color.GREEN);
        renderer.setSeriesPaint(1, Color.BLUE);

        ChartUtilities.saveChartAsPNG(stockageImg, chart, 800, 400, info);

    } catch (Exception e) {
            log.error("erreur generation graphique ",e);
    }

1 个答案:

答案 0 :(得分:0)

我找到了问题的原因:

  • 我记录了JfreeChart使用的字体:它是SansSerif.plain
  • 查看OpenJDK,在文件fontconfig.properties中,我找到了:

sansserif.plain.latin-1 = DejaVu LGC Sans

filename.DejaVu_LGC_Sans =的/ usr /共享/字体/ DEJAVU-LGC / DejaVuLGCSans.ttf

我没有在我的机器上安装此字体,所以我安装了它并且它运行良好。