JfreeChar 画横向柱状图

 public class FinancePlot extends Plot implements Cloneable, Serializable {

     /**
      *
      */
     private static final long serialVersionUID = 1L;

     /** The default grid line stroke. */
     public static final Stroke DEFAULT_GRIDLINE_STROKE = new BasicStroke(0.5f,
             BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0.0f, new float[]
             {2.0f, 2.0f}, 0.0f);

     /** The default grid line paint. */
     private Color DEFAULT_GRIDLINE_PAINT = Color.lightGray;
     private Color DEFAULT_GREENLINE_PAINT = new Color(213,249,254);

     /** The default value label font. */
     private Font DEFAULT_VALUE_LABEL_FONT = new Font("SansSerif", Font.PLAIN, 18);

     private Color DEFAULT_VALUE_LABEL_COLOR = Color.BLACK;

     /** The default font for titles. */
     public static final Font DEFAULT_TITLE_FONT = new Font("SansSerif", Font.BOLD, 18);

     public static final int DEFAULT_MARGIN = 5;
     /**每根柱子的高度*/
     private static final int DEFAULT_BAR_HEIGHT = 20;
     /**每根柱子的宽度*/
     private static final int DEFAULT_BAR_WIDTH = 320;
     /**标签宽度*/
     private static final int DEFAULT_LABEL_WIDTH = 100;
     /**标签高度*/
     private static final int DEFAULT_LABEL_HEIGHT = 70;

     /**图型数据集合*/
     private List<Finance> dataset;
     /**地区*/
     private String district_name;
     /**柱子标签标题*/
     private String labelTitle = null;
     /**被除数标题*/
     private String dividendTitle = null;
     /**除数标题*/
     private String divisorTitle = null;

     /**
      * 财务报表图
      * @param dataset 当前财务数据
      * @param title1 柱子标签标题
      * @param title2 被除数标题
      * @param title3 除数标题
      */
     public FinancePlot(List<Finance> dataset,String title1,String title2,String title3){
         setDataset(dataset);
         setDistrict_name(district_name);
         setLabelTitle(title1);
         setDividendTitle(title2);
         setDivisorTitle(title3);
     }

      public void draw(Graphics2D g2, Rectangle2D area,
              Point2D anchor,
              PlotState parentState,
              PlotRenderingInfo state) {
          // don't let anyone draw outside the data area
             Shape savedClip = g2.getClip();
             g2.setStroke(new BasicStroke(1.0f));
             g2.clip(area);
             g2.setFont(DEFAULT_VALUE_LABEL_FONT);
             //画白色背景
             g2.fillRect((int)area.getX(), (int)area.getY(), (int)area.getWidth(), (int)area.getHeight());
             //画图例
             int x = getDEFAULT_MARGIN();
             int y = getDEFAULT_MARGIN();
             if(getLegendColor()!=null){
                 createLegend(g2);
                 x = getDEFAULT_MARGIN();
                 y = 45;
             }

             //画三个标题{指标，指标排名，企业总数}
             g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
             if(getLabelTitle()!=null){
                 g2.drawString(getLabelTitle(), x, y);
             }
             if(getDividendTitle()!=null){
                 x = 100+(340-calcStringWidth(g2,DEFAULT_VALUE_LABEL_FONT,getDividendTitle()))/2;
                 g2.drawString(getDividendTitle(), x, y);
             }
            if(getDivisorTitle()!=null){
                x = 520+((50-calcStringWidth(g2,DEFAULT_VALUE_LABEL_FONT,getDivisorTitle()))/2);
                g2.drawString(getDivisorTitle(), x, y);
            }

             //画指标排名矩形框
             x = 70;
             y = y + 30;
 //          g2.setColor(DEFAULT_GREENLINE_PAINT);
 //          g2.drawString("", x, 620);

             //画指企业总数矩形框
             x = 625;
 //          g2.setColor(DEFAULT_GREENLINE_PAINT);
 //          g2.drawString("", x, 85);

             //画后四项的标尺刻度
             for(int i = 1; i < dataset.size(); i++){
                 g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
                 //画标尺的横线
                 g2.drawLine(70, (y+95*i)+10, 400, (y+95*i)+10);
                 //画标尺的刻度线，小竖线高度5
                 g2.drawLine(70, (y+95*i)+10, 70, (y+95*i)+5);
                 g2.drawString("100%", 70, (y+95*i));

                 for(int n = 2; n <= 4; n++){
                     g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
                     g2.drawString((100-25*(n-1))+"%", 95+80*(n-1), (y+95*i));
                     g2.drawLine(95+80*(n-1), (y+95*i)+10, 95+80*(n-1), (y+95*i)+5);
                 }

                 g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
                 g2.drawString("0%", 400, (y+95*i));
                 g2.drawLine(400, (y+95*i)+10, 400, (y+95*i)+5);
             }



             //画柱子标签、柱子及柱子值
             Map<String,Color> legendColor = getLegendColor();
             x = 70;
             g2.setStroke(new BasicStroke(1));

             for(int i = 0;i < dataset.size(); i++){
                 Finance finance = dataset.get(i);
                 int j =0;
                 //循环得到一个小柱形图
                 for(String key : legendColor.keySet()){
                     //标签
                     g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
                     TextUtils.drawMultiLineText(finance.getLabel(), g2, this.DEFAULT_VALUE_LABEL_FONT, 65, new Point2D.Double(getDEFAULT_MARGIN(), (y+95*i)+25));
                     //计算柱形长度
                     int w = 360;
                     if(finance.getDivsior(key)!=null && finance.getDivsior(key).intValue()!=0 && finance.getDividend(key)!=null){
                         w = new BigDecimal(1).subtract(finance.getDividend(key).divide(finance.getDivsior(key),2, RoundingMode.HALF_UP)).multiply(new BigDecimal(320)).intValue();
                     }
                     //画柱子
                     g2.setColor(Color.WHITE);
                     g2.drawRect(x, (y+95*i)+20*j+15, w, getDEFAULT_BAR_HEIGHT());
                     //将矩形填充为颜色
                     g2.setColor(finance.getLegend_color().get(key));
                     g2.fillRect(x, (y+95*i)+20*j+15, w, getDEFAULT_BAR_HEIGHT());
                     //画间隔
                     g2.setColor(Color.WHITE);
                     g2.drawRect(x, (y+95*i)+20*j+15, w, 2);
                     //将矩形填充为颜色
                     g2.setColor(Color.WHITE);
                     g2.fillRect(x, (y+95*i)+20*j+15, w, 2);

 //                  //画柱子值
                     g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
                     if(finance.getDividend(key)!=null){
                         g2.drawString(finance.getDividend(key).intValue()+"", x+w+2, (y+95*i)+20*(j+1)+10);
                     }
                     //画柱子除数值
                     if(finance.getDivsior(key)!=null){
                         g2.drawString(finance.getDivsior(key).intValue()+"", 530, (y+95*i)+20*(j+1)+10);
                     }
                     j++;
                 }
             }
             //画最上面的刻度尺
             g2.drawLine(70, y+10, 400, y+10);
             g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
             g2.drawLine(x, y+10, x, y+5);
             g2.drawString("100%", x, y-5);
             for(int i = 2; i <= 4; i++){
                 g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
                 g2.drawString((100-25*(i-1))+"%", 70+80*(i-1), y-5);
                 g2.drawLine(70+80*(i-1), y+10, 70+80*(i-1), y+5);
             }
             g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
             g2.drawLine(400, y+10, 400, y+5);
             g2.drawString("0%", 400, y-5);
             g2.setClip(savedClip);
     }

      private void createLegend(Graphics2D g2){
          int x = getDEFAULT_MARGIN();
          int y = getDEFAULT_MARGIN();
          Map<String,Color> legendColor = getLegendColor();
          for(String key : legendColor.keySet()){
              //画一个矩形
              g2.setColor(legendColor.get(key));
              g2.drawRect(x, y, 20, 10);
              //将矩形填充颜色
              g2.fillRect(x, y, 20, 10);
              x = x + 20;
              //画图例标签
              g2.setColor(DEFAULT_VALUE_LABEL_COLOR);
              g2.drawString(key, x+10, y+10);
              //计算图例标签的宽度+图例间隔30
              x = x + calcStringWidth(g2,DEFAULT_VALUE_LABEL_FONT,key) + 30;
          }
      }

      private int calcStringWidth(Graphics2D g2,Font ft,String title){
          FontMetrics fm = g2.getFontMetrics(ft);
          Rectangle2D textBound = TextUtilities.getTextBounds(title,g2,fm);
          return (int)textBound.getWidth();
      }



     @Override
     public String getPlotType() {
         return "Finace Plot";
     }

     public static int getDEFAULT_BAR_HEIGHT() {
         return DEFAULT_BAR_HEIGHT;
     }

     public static int getDEFAULT_BAR_WIDTH() {
         return DEFAULT_BAR_WIDTH;
     }

     public static Stroke getDEFAULT_GRIDLINE_STROKE() {
         return DEFAULT_GRIDLINE_STROKE;
     }

     public static int getDEFAULT_LABEL_HEIGHT() {
         return DEFAULT_LABEL_HEIGHT;
     }

     public static int getDEFAULT_LABEL_WIDTH() {
         return DEFAULT_LABEL_WIDTH;
     }

     public static int getDEFAULT_MARGIN() {
         return DEFAULT_MARGIN;
     }

     public static Font getDEFAULT_TITLE_FONT() {
         return DEFAULT_TITLE_FONT;
     }

     public void setDataset(List<Finance> dataset) {
         this.dataset = dataset;
     }

     public void setDistrict_name(String district_name) {
         this.district_name = district_name;
     }

     public void setDividendTitle(String dividendTitle) {
         this.dividendTitle = dividendTitle;
     }

     public void setDivisorTitle(String divisorTitle) {
         this.divisorTitle = divisorTitle;
     }

     public void setLabelTitle(String labelTitle) {
         this.labelTitle = labelTitle;
     }

     public String getDividendTitle() {
         return dividendTitle;
     }

     public String getDivisorTitle() {
         return divisorTitle;
     }

     public String getLabelTitle() {
         return labelTitle;
     }

     private Map<String,Color> getLegendColor(){
         Map<String,Color> legendColor = null;
         if(dataset!=null){
             legendColor = new LinkedHashMap<String,Color>();
             for(int i=0; i<dataset.size(); i++){
                 Finance finance = dataset.get(i);
                 if(finance==null || finance.getLegend_color()==null) continue;

                 legendColor.putAll(finance.getLegend_color());
             }
         }
         return legendColor;
     }

     public void setDEFAULT_GRIDLINE_PAINT(Color default_gridline_paint) {
         DEFAULT_GRIDLINE_PAINT = default_gridline_paint;
     }

     public void setDEFAULT_VALUE_LABEL_FONT(Font default_value_label_font) {
         DEFAULT_VALUE_LABEL_FONT = default_value_label_font;
     }

     public void setDEFAULT_VALUE_LABEL_COLOR(Color default_value_label_color) {
         DEFAULT_VALUE_LABEL_COLOR = default_value_label_color;
     }
 }

 

注：

转自：http://blog.csdn.net/soconglin/article/details/6759114