如何克服JFreeChart问题？

我在我的struts应用程序中使用Jfree图表。 Y轴在装运件上，X轴是供应商代码，副轴用于装运量％。我在这里面临的问题是，如果超过货运％值全部达到零，它也会隐藏X轴供应商值。我如何克服，以避免这一点。我附上了这里的屏幕截图供您考虑。感谢所有人阅读这个问题。如何克服JFreeChart问题？

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我粘贴在这里我的代码为您清晰的认识，

/** 
    * 
    * @param response 
    * @throws IOException 
    */ 
    public void writeOccurrenceBasedParetoChart(HttpServletResponse response) throws IOException 
    { 
     String METHOD_NAME = "writeOccurrenceBasedParetoChart"; 
     log.entering(CLASS_NAME, METHOD_NAME); 

     CategoryDataset dataset1 = createDataSetForPercentBasedChart1(); 
     CategoryDataset dataset2 = createDataSetForPercentBasedChart2(); 
     String rangeAxisLabel = ""; 
     String numOfSupplrs = ""; 
     //Behind Schedule "4" 
     if(searchRatingElement.equalsIgnoreCase("4")) 
     {   
      System.out.println("*******************searchRatingElement"+searchRatingElement); 
      rangeAxisLabel = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.ovrshptpcs"); 
     } 
     else 
     { 
      rangeAxisLabel = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.ovrshptpcs"); 
     } 

     JFreeChart chart = ChartFactory.createBarChart(
       "",  // chart title 
       "",    // domain axis label 
       rangeAxisLabel,     // range axis label 
       dataset1,     // data 
       PlotOrientation.VERTICAL, // orientation 
       true,      // include legend 
       true,      // tooltips? 
       false      // URLs? 
      ); 

      // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... 

      // set the background color for the chart... 
      chart.setBackgroundPaint(Color.white); 
      CategoryPlot plot = (CategoryPlot) chart.getPlot(); 
      plot.setBackgroundPaint(Color.lightGray); 


      plot.setDataset(1, dataset2); 
      plot.mapDatasetToRangeAxis(1, 1); 

      CategoryItemRenderer renderer1 = plot.getRenderer(); 
      renderer1.setSeriesItemLabelGenerator(0,new CategoryItemLabelGenerator() { 

       public String generateRowLabel(final CategoryDataset arg0, final int arg1) { 
        // TODO Auto-generated method stub 
        return null; 
       } 

       public String generateLabel(final CategoryDataset dataset1,final int series,final int category) { 
        String result = null; 
        //CHAPTER 12. ITEM LABELS 91 
        final Number value = dataset1.getValue(series, category); 
        if (value != null) { 
        final double v = value.doubleValue(); 
        if (v > 0) { 
        result = value.toString(); // could apply formatting here 
        } 
        } 
        return result; 
        } 


       public String generateColumnLabel(final CategoryDataset arg0, final int arg1) { 
        // TODO Auto-generated method stub 
        return null; 
       } 
      }); 
      renderer1.setSeriesItemLabelsVisible(0,true); 

      BarRenderer renderer = (BarRenderer) plot.getRenderer(); 
      renderer.setDrawBarOutline(false); 
      renderer.setSeriesOutlinePaint(0,Color.BLACK); 
      renderer.setDrawBarOutline(true); 
      renderer.setMaximumBarWidth(0.02); 
      renderer.setSeriesPaint(0,new Color(170, 0, 85));   

      CategoryAxis domainAxis = plot.getDomainAxis(); 
      domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(.6)); 
      domainAxis.setLabelFont(new Font("Helvetica", Font.BOLD, 14)); 
      domainAxis.setTickLabelFont(new Font("Helvetica", Font.BOLD, 14)); 

      //Behind Schedule "4" 
      if(searchRatingElement.equalsIgnoreCase("4")) 
      {   
       System.out.println("||||||||||||||||||||||||||||||||searchRatingElement"+searchRatingElement); 
       numOfSupplrs = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.bhndschpctforchart"); 
      } 
      else 
      { 
       numOfSupplrs = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.ovrshptpctforchart"); 
      } 

      ValueAxis axis2 = new NumberAxis(numOfSupplrs); 
      axis2.setLabelFont(new Font("Helvetica", Font.BOLD, 14));  
      axis2.setTickLabelFont(new Font("Helvetica", Font.PLAIN, 14)); 
      //if(!this.isValueDataZeros) 
       //axis2.setRange(0,13); 
      plot.setRangeAxis(1, axis2); 

      NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); 
      // if(!this.isNumberDataZeros) 
       //rangeAxis.setRange(0,90); 
      //rangeAxis.setTickUnit(new NumberTickUnit(1)); 
      rangeAxis.setLabelFont(new Font("Helvetica", Font.BOLD, 14)); 
      rangeAxis.setTickLabelFont(new Font("Helvetica", Font.PLAIN, 14)); 

      LineAndShapeRenderer renderer2 = new LineAndShapeRenderer(); 
      renderer2.setSeriesPaint(0, Color.BLUE); 
      /*Start */ 
      renderer2.setSeriesItemLabelGenerator(0,new CategoryItemLabelGenerator() { 

       public String generateRowLabel(final CategoryDataset arg0, final int arg1) { 
        // TODO Auto-generated method stub 
        return null; 
       } 

       public String generateLabel(final CategoryDataset dataset1,final int series,final int category) { 
        String result = null; 
        //CHAPTER 12. ITEM LABELS 91 
        final Number value = dataset1.getValue(series, category); 
        if (value != null) { 
        final double v = value.doubleValue(); 
        if (v > 0) { 
        result = value.toString(); // could apply formatting here 
        } 
        } 
        return result; 
        } 


       public String generateColumnLabel(final CategoryDataset arg0, final int arg1) { 
        // TODO Auto-generated method stub 
        return null; 
       } 
      }); 
      renderer2.setSeriesItemLabelsVisible(0,true); 
      /* End */ 
      plot.setRenderer(1, renderer2); 
      plot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD); 

      ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, 
        1150, 450); 
    } 
    /** 
    * 
    */ 
    public DefaultCategoryDataset createDataSetForPercentBasedChart1() 
    { 
     String METHOD_NAME = "createDataSetForPercentBasedChart1"; 
     log.entering(CLASS_NAME, METHOD_NAME); 

     DefaultCategoryDataset dataSetForOccurrenceBasedChart = new DefaultCategoryDataset(); 

     boolean flagForPercentPareto = false; 
     String occurrenceCountLabelName = null; 
     try 
     { 
      if(paretoReportBasedDataQO != null && paretoReportBasedDataQO.size()>0) 
      { 
       //Behind Schedule "4" 
       if(searchRatingElement.equalsIgnoreCase("4")) 
       {    
        occurrenceCountLabelName = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.bhndschpctforchart"); 
       } 
       else 
       { 
        occurrenceCountLabelName = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.ovrshptpcs"); 
       } 
       if(!flagForPercentPareto) 
       { 
        for(int i =0;i<paretoReportBasedDataQO.size();i++) 
        { 
         dataSetForOccurrenceBasedChart.addValue(paretoReportBasedDataQO.get(i).getOverShipmentPiecesCount(), occurrenceCountLabelName, paretoReportBasedDataQO.get(i).getSupplierName()); 
        } 
       } 
      } 
     } 
     catch(Exception exceptionOccurrenceBasedChart) 
     { 
      flagForPercentPareto = true; 
      System.out.println("Exception In createDataSetForPercentBasedChart1 : "+exceptionOccurrenceBasedChart.getMessage()); 
     } 

     log.exiting(CLASS_NAME, METHOD_NAME); 
     return dataSetForOccurrenceBasedChart; 
    } 
    /** 
    * 
    */ 
    public DefaultCategoryDataset createDataSetForPercentBasedChart2() 
    { 
     String METHOD_NAME = "createDataSetForPercentBasedChart2"; 
     log.entering(CLASS_NAME, METHOD_NAME); 

     DefaultCategoryDataset dataSetForOccurrenceBasedChart = new DefaultCategoryDataset(); 

     boolean flagForPercentPareto = false; 
     String occurrenceCountLabelName = null; 
     try 
     { 
      if(paretoReportBasedDataQO != null && paretoReportBasedDataQO.size()>0) 
      { 
       if(searchRatingElement.equalsIgnoreCase("4")) 
       {    
        occurrenceCountLabelName = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.bhndschpctforchart"); 
       } 
       else 
       { 
        occurrenceCountLabelName = I18nMessageUtil.getMessage(CommonUtil.getLocale(), "label.reports.wdid.ovrshptpctforchart"); 
       } 
       if(!flagForPercentPareto) 
       { 
        for(int i =0;i<paretoReportBasedDataQO.size();i++) 
        { 
         dataSetForOccurrenceBasedChart.addValue(paretoReportBasedDataQO.get(i).getOverShipmentPercentageCount(), occurrenceCountLabelName, paretoReportBasedDataQO.get(i).getSupplierName()); 
        } 
       } 
      } 
     } 
     catch(Exception exceptionOccurrenceBasedChart) 
     { 
      flagForPercentPareto = true; 
      System.out.println("Exception In createDataSetForPercentBasedChart2 : "+exceptionOccurrenceBasedChart.getMessage()); 
     } 

     log.exiting(CLASS_NAME, METHOD_NAME); 
     return dataSetForOccurrenceBasedChart; 
    }

来源

2012-12-05 Adalarasan_Serangulam

它很难找出什么你问，我可以看到你在出货量是零，但你仍然有X（域）轴。你可以举一个非零过度的例子 – GrahamA

如果供应商在场，它显示在X轴上（AA8SA）。我可以在这里发布代码吗？ –

如果你把标签中的另一个位置？例如：

renderer.setBasePositiveItemLabelPosition(
new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER));

来源

2013-01-28 14:45:10 tyranitar

你能否请告诉我，我可以把这段代码代替我的代码放在哪里？ –

请试一下'BarRenderer renderer =（BarRenderer）plot.getRenderer（）;' – tyranitar

如何克服JFreeChart问题？

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