chartmanagement.java

java版源代码,里面包含很多源代码,大家可以看看.

      }
    }
    else {
      throw new Exception("数据集DBResult是空的");
    }

    return dataset;
  }

  /**
   * 根据数据源生成图形
   * @param ds Dataset 数据源
   * @param flag 生成类型
   * @return BufferedImage
   * @throws Exception
   */
  private BufferedImage outputChart(Dataset ds, int flag) throws Exception {

    OutputStream out = null;
    if (flag == ChartManagement.RESPONSE) {
      //设置头信息

      ( (HttpServletResponse) response).setContentType(CONTENT_TYPE);
      ( (HttpServletResponse) response).setHeader("Content-Disposition",
                                                  " filename=image.png");
      out = ( (HttpServletResponse) response).getOutputStream();

    }
    else if (flag == ChartManagement.FILE) {
      out = new BufferedOutputStream(new
                                     FileOutputStream( (String)this.descFile));
    }

    try {

      JFreeChart chart = null;
      //生成Pie
      if (chart_type.equalsIgnoreCase(ChartManagement.PIE)) {
        //如果是3DPie
        if (is3d) {
          //如果有aplha效果
          if (isalpha) {
            PiePlot3D plot = new PiePlot3D( (PieDataset)
                                           ds);
            plot.setForegroundAlpha(0.5f);
            //如果有背景图片
            if (this.backGroundColor != null)
              plot.setBackgroundPaint(this.backGroundColor);
            chart = new JFreeChart(title, plot);

          }
          //如果没有alpha效果
          else {
            chart = ChartFactory.createPieChart3D(title,
                                                  (PieDataset) ds, true, false, false);

            if (this.backGroundColor != null)
              chart.setBackgroundPaint(this.backGroundColor);

          }
        }
        //如果是2DPie
        else {
          if (isalpha) {
            PiePlot plot = new PiePlot( (PieDataset)
                                       ds);
            plot.setForegroundAlpha(0.5f);
            //如果有背景图片
            if (this.backGroundColor != null)
              plot.setBackgroundPaint(this.backGroundColor);
            chart = new JFreeChart(title, plot);

          }
          else {

            chart = ChartFactory.createPieChart(title, (PieDataset) ds, true, false, false);
            if (this.backGroundColor != null)
              chart.setBackgroundPaint(this.backGroundColor);
          }
        }
      }
      //Ring 2D
      else if (chart_type.equalsIgnoreCase(ChartManagement.RING)) {

        if (isalpha) {
          RingPlot plot = new RingPlot( (PieDataset)
                                       ds);
          plot.setForegroundAlpha(0.5f);
          //如果有背景图片
          if (this.backGroundColor != null)
            plot.setBackgroundPaint(this.backGroundColor);
          chart = new JFreeChart(title, plot);

        }
        else {

          chart = ChartFactory.createRingChart(title, (PieDataset) ds, true, false, false);
          if (this.backGroundColor != null)
            chart.setBackgroundPaint(this.backGroundColor);
        }

      }

      //生成Bar
      else if (chart_type.equalsIgnoreCase(ChartManagement.BAR)) {
        //如果是3D bar
        if (is3d) {

          chart = ChartFactory.createBarChart3D(title,
                                                categoryTag, valueTag,
                                                (CategoryDataset) ds,
                                                PlotOrientation.VERTICAL,
                                                this.result.ColumnCount > 2 ? true : false, false, false);
          if (this.backGroundColor != null)
            chart.setBackgroundPaint(this.backGroundColor);

        }
        else {
          chart = ChartFactory.createBarChart(title,
                                              categoryTag, valueTag,
                                              (CategoryDataset) ds,
                                              PlotOrientation.VERTICAL,
                                              this.result.ColumnCount > 2 ? true : false, false, false);
          if (this.backGroundColor != null)
            chart.setBackgroundPaint(this.backGroundColor);
        }
      }
      //生成Line
      else if (chart_type.equalsIgnoreCase(ChartManagement.LINE)) {
        chart = ChartFactory.createLineChart(title,
                                             categoryTag, valueTag,
                                             (CategoryDataset) ds,
                                             PlotOrientation.VERTICAL,
                                             this.result.ColumnCount > 2 ? true : false, false, false);
        if (this.backGroundColor != null)
          chart.setBackgroundPaint(this.backGroundColor);
      }
      //生成XYLine
      else if (chart_type.equalsIgnoreCase(ChartManagement.XYLINE)) {
        chart = ChartFactory.createXYLineChart(title,
                                               categoryTag, valueTag,
                                               (XYDataset) ds,
                                               PlotOrientation.VERTICAL,
                                               true, false, false);
        if (this.backGroundColor != null)
          chart.setBackgroundPaint(this.backGroundColor);

      }
      //XYAREA
      else if (chart_type.equalsIgnoreCase(ChartManagement.XYAREA)) {
        chart = ChartFactory.createXYAreaChart(title,
                                               categoryTag, valueTag,
                                               (XYDataset) ds,
                                               PlotOrientation.VERTICAL,
                                               true, false, false);
        if (this.backGroundColor != null)
          chart.setBackgroundPaint(this.backGroundColor);

      }

      //生成StackBar
      else if (chart_type.equalsIgnoreCase(ChartManagement.STACKBAR)) {
        if (is3d) {
          chart = ChartFactory.createStackedBarChart(title,
              categoryTag, valueTag,
              (CategoryDataset) ds,
              PlotOrientation.VERTICAL, this.result.ColumnCount > 2 ? true : false, false, false);
          if (this.backGroundColor != null)
            chart.setBackgroundPaint(this.backGroundColor);
        }
        else {
          chart = ChartFactory.createStackedBarChart3D(title,
              categoryTag, valueTag,
              (CategoryDataset) ds,
              PlotOrientation.VERTICAL, this.result.ColumnCount > 2 ? true : false, false, false);
          if (this.backGroundColor != null)
            chart.setBackgroundPaint(this.backGroundColor);
        }
      }
      //生成Area
      else if (chart_type.equalsIgnoreCase(ChartManagement.AREA)) {
        chart = ChartFactory.createAreaChart(title,
                                             categoryTag, valueTag,
                                             (CategoryDataset) ds,
                                             PlotOrientation.VERTICAL,
                                             this.result.ColumnCount > 2 ? true : false, false, false);
        if (this.backGroundColor != null)
          chart.setBackgroundPaint(this.backGroundColor);
      }
      //生成StackArea
      else if (chart_type.equalsIgnoreCase(ChartManagement.STACKAREA)) {
        chart = ChartFactory.createStackedAreaChart(title,
            categoryTag, valueTag,
            (CategoryDataset) ds,
            PlotOrientation.VERTICAL, this.result.ColumnCount > 2 ? true : false, false, false);
        if (this.backGroundColor != null)
          chart.setBackgroundPaint(this.backGroundColor);
      }
      //设置副标题
      if (this.subTitle != null && this.subTitle.length() > 0 && chart != null) {

        chart.addSubtitle(new TextTitle(this.subTitle));

      }

      SetChartExtProperty(chart);

      //以PNG方式生成
      if (flag == ChartManagement.FILE || flag == ChartManagement.RESPONSE) {
        ChartUtilities.writeChartAsPNG(out, chart, width, height, null);
        return null;
      }
      else {
        return chart.createBufferedImage(width, height);
      }
    }
    finally {
      if (out != null) {
        out.flush();
        out.close();
      }
    }

  }

  /**
   * 获得其他的数据信息,用于扩展
   * @return Dataset
   */
  protected Dataset getExtInputData() {
    return null;
  }

  /**
   * 设置更多的图形属性,用于扩展
   * @param chart JFreeChart
   */
  protected void SetChartExtProperty(JFreeChart chart) {

  }

  public void setIs3d(boolean is3d) {
    this.is3d = is3d;
  }

  public void setTitle(String title) {
    this.title = title;
  }

  public void setValueTag(String valueTag) {
    this.valueTag = valueTag;
  }

  public void setCategoryTag(String categoryTag) {
    this.categoryTag = categoryTag;
  }

  public void setWidth(int width) {
    this.width = width;
  }

  public void setHeight(int height) {
    this.height = height;
  }

  public void setChartType(String ChartType) {
    this.chart_type = ChartType;
  }

  public void setResult(DBResult result) {
    this.result = result;
  }

  public void setBackGroundColor(Color backGroundColor) {
    this.backGroundColor = backGroundColor;
  }

  public void setIsalpha(boolean isalpha) {
    this.isalpha = isalpha;
  }

  public void setDescFile(String descFile) {
    this.descFile = descFile;
  }

  public void setSubTitle(String subTitle) {
    this.subTitle = subTitle;
  }

  public void setLegend(String[] Legend) {
    this.Legend = Legend;
  }

  public Color getBackGroundColor() {
    return backGroundColor;
  }

  public String getDescFile() {
    return descFile;
  }

  public String getSubTitle() {
    return subTitle;
  }

  public String[] getLegend() {
    return Legend;
  }

}