JFreeChart之堆叠柱形图(StackedBar)

JAVA

JFreeChart

最近的项目使用有个功能需要使用到堆叠柱形图，看了项目以前的代码实现没有想要的结果。所以自己就先到官网下载了 Demo，Demo里有个打包好的Jar包，直接运行看到效果，但是坑爹的是貌似没有对应的源码，所以只能根据class名称直接google了，所幸在github里找到对应的源码。
点我下载 访问密码 f62b
这是运行Demo找到想要实现的效果的大致图：

我最终想要实现的效果是这样的：

如果想要实现这个效果，可以使用

1. 1extendedstackedbarrenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator("{3}", 

   ---

2. 2 NumberFormat.getPercentInstance(), new DecimalFormat("#0.0%"))); 

   ---

3. 3 

   ---

但是柱体的返回的值是10.1/50.1=20.2%,40.1/50.1=79.8%

这不符合预期目标，所以就去看了一下源码，在StandardCategoryItemLabelGenerator的父类AbstractCategoryItemLabelGenerator中发现有createItemArray这么一个方法：

可以发现柱体的标签值应该是由这个方法进行返回的，因此自己就对StandardCategoryItemLabelGenerator进行了继承，并重写了这个方法。
在ExtendedStandardCategoryItemLabelGeneratory中增加了isPercent作为标签值是显示百分比还是仅仅格式化的判断参数，并重写了createItemArray这个方法。

此时得到的效果如图：

然而，柱体的总值还是没有格式化。再看了一下ExtendedStackedBarRenderer这个类的代码，找到了totalFormat这个属性，将其值赋为new DecimalFormat("#0.0%")。测试：

基本是想要的最终结果,下面是测试代码

1. 1 <dependency> 

   ---

2. 2 <groupId>jfree</groupId> 

   ---

3. 3 <artifactId>jfreechart</artifactId> 

   ---

4. 4 <version>1.0.13</version> 

   ---

5. 5 </dependency> 

   ---

ExtendedStackedBarRenderer

1. 1package com.springapp.jfreechar; 

   ---

2. 2 

   ---

3. 3import java.awt.Color; 

   ---

4. 4import java.awt.Font; 

   ---

5. 5import java.awt.Graphics2D; 

   ---

6. 6import java.awt.geom.Rectangle2D; 

   ---

7. 7import java.text.DecimalFormat; 

   ---

8. 8import java.text.NumberFormat; 

   ---

9. 9 

   ---

10. 10import org.jfree.chart.axis.CategoryAxis; 

    ---

11. 11import org.jfree.chart.axis.ValueAxis; 

    ---

12. 12import org.jfree.chart.entity.CategoryItemEntity; 

    ---

13. 13import org.jfree.chart.entity.EntityCollection; 

    ---

14. 14import org.jfree.chart.labels.CategoryToolTipGenerator; 

    ---

15. 15import org.jfree.chart.plot.CategoryPlot; 

    ---

16. 16import org.jfree.chart.plot.PlotOrientation; 

    ---

17. 17import org.jfree.chart.renderer.category.CategoryItemRendererState; 

    ---

18. 18import org.jfree.chart.renderer.category.StackedBarRenderer; 

    ---

19. 19import org.jfree.data.category.CategoryDataset; 

    ---

20. 20import org.jfree.text.TextUtilities; 

    ---

21. 21import org.jfree.ui.TextAnchor; 

    ---

22. 22 

    ---

23. 23public class ExtendedStackedBarRenderer extends StackedBarRenderer { 

    ---

24. 24 

    ---

25. 25 private static final long serialVersionUID = 1L; 

    ---

26. 26 private boolean showPositiveTotal; 

    ---

27. 27 private boolean showNegativeTotal; 

    ---

28. 28 private Font totalLabelFont; 

    ---

29. 29 private NumberFormat totalFormatter; 

    ---

30. 30 public ExtendedStackedBarRenderer() { 

    ---

31. 31 showPositiveTotal = true; 

    ---

32. 32 showNegativeTotal = true; 

    ---

33. 33 totalLabelFont = new Font("SansSerif", 1, 12); 

    ---

34. 34 totalFormatter = new DecimalFormat("#0.0%"); 

    ---

35. 35 } 

    ---

36. 36 

    ---

37. 37 /** 

    ---

38. 38 * StackedBarRenderer 没有这个构造方法的，传入一个NumberFormat类，可以自定义实现每个柱体值显示格式 

    ---

39. 39 * @param totalFormatter 

    ---

40. 40 */ 

    ---

41. 41 public ExtendedStackedBarRenderer(NumberFormat totalFormatter) { 

    ---

42. 42 showPositiveTotal = true; 

    ---

43. 43 showNegativeTotal = true; 

    ---

44. 44 totalLabelFont = new Font("SansSerif", 1, 12); 

    ---

45. 45 this.totalFormatter = totalFormatter; 

    ---

46. 46 } 

    ---

47. 47 

    ---

48. 48 public NumberFormat getTotalFormatter() { 

    ---

49. 49 return totalFormatter; 

    ---

50. 50 } 

    ---

51. 51 

    ---

52. 52 public void setTotalFormatter(NumberFormat numberformat) { 

    ---

53. 53 if (numberformat == null) { 

    ---

54. 54 throw new IllegalArgumentException("Null format not permitted."); 

    ---

55. 55 } else { 

    ---

56. 56 totalFormatter = numberformat; 

    ---

57. 57 return; 

    ---

58. 58 } 

    ---

59. 59 } 

    ---

60. 60 

    ---

61. 61 public void drawItem(Graphics2D graphics2d, CategoryItemRendererState categoryitemrendererstate, Rectangle2D rectangle2d, CategoryPlot categoryplot, CategoryAxis categoryaxis, 

    ---

62. 62 ValueAxis valueaxis, CategoryDataset categorydataset, int i, int j, int k) { 

    ---

63. 63 Number number = categorydataset.getValue(i, j); 

    ---

64. 64 if (number == null) 

    ---

65. 65 return; 

    ---

66. 66 double d = number.doubleValue(); 

    ---

67. 67 PlotOrientation plotorientation = categoryplot.getOrientation(); 

    ---

68. 68 double d1 = categoryaxis.getCategoryMiddle(j, getColumnCount(), rectangle2d, categoryplot.getDomainAxisEdge()) - categoryitemrendererstate.getBarWidth() / 2D; 

    ---

69. 69 double d2 = 0.0D; 

    ---

70. 70 double d3 = 0.0D; 

    ---

71. 71 for (int l = 0; l < i; l++) { 

    ---

72. 72 Number number1 = categorydataset.getValue(l, j); 

    ---

73. 73 if (number1 == null) 

    ---

74. 74 continue; 

    ---

75. 75 double d5 = number1.doubleValue(); 

    ---

76. 76 if (d5 > 0.0D) 

    ---

77. 77 d2 += d5; 

    ---

78. 78 else 

    ---

79. 79 d3 += d5; 

    ---

80. 80 } 

    ---

81. 81 

    ---

82. 82 org.jfree.ui.RectangleEdge rectangleedge = categoryplot.getRangeAxisEdge(); 

    ---

83. 83 double d4; 

    ---

84. 84 double d6; 

    ---

85. 85 if (d > 0.0D) { 

    ---

86. 86 d4 = valueaxis.valueToJava2D(d2, rectangle2d, rectangleedge); 

    ---

87. 87 d6 = valueaxis.valueToJava2D(d2 + d, rectangle2d, rectangleedge); 

    ---

88. 88 } else { 

    ---

89. 89 d4 = valueaxis.valueToJava2D(d3, rectangle2d, rectangleedge); 

    ---

90. 90 d6 = valueaxis.valueToJava2D(d3 + d, rectangle2d, rectangleedge); 

    ---

91. 91 } 

    ---

92. 92 double d7 = Math.min(d4, d6); 

    ---

93. 93 double d8 = Math.max(Math.abs(d6 - d4), getMinimumBarLength()); 

    ---

94. 94 Rectangle2D.Double double1 = null; 

    ---

95. 95 if (plotorientation == PlotOrientation.HORIZONTAL) 

    ---

96. 96 double1 = new Rectangle2D.Double(d7, d1, d8, categoryitemrendererstate.getBarWidth()); 

    ---

97. 97 else 

    ---

98. 98 double1 = new Rectangle2D.Double(d1, d7, categoryitemrendererstate.getBarWidth(), d8); 

    ---

99. 99 java.awt.Paint paint = getItemPaint(i, j); 

    ---

100. 100 graphics2d.setPaint(paint); 

     ---

101. 101 graphics2d.fill(double1); 

     ---

102. 102 if (isDrawBarOutline() && categoryitemrendererstate.getBarWidth() > 3D) { 

     ---

103. 103 graphics2d.setStroke(getItemStroke(i, j)); 

     ---

104. 104 graphics2d.setPaint(getItemOutlinePaint(i, j)); 

     ---

105. 105 graphics2d.draw(double1); 

     ---

106. 106 } 

     ---

107. 107 org.jfree.chart.labels.CategoryItemLabelGenerator categoryitemlabelgenerator = getItemLabelGenerator(i, j); 

     ---

108. 108 if (categoryitemlabelgenerator != null && isItemLabelVisible(i, j)) 

     ---

109. 109 drawItemLabel(graphics2d, categorydataset, i, j, categoryplot, categoryitemlabelgenerator, double1, d < 0.0D); 

     ---

110. 110 if (d > 0.0D) { 

     ---

111. 111 if (showPositiveTotal && isLastPositiveItem(categorydataset, i, j)) { 

     ---

112. 112 graphics2d.setPaint(Color.black); 

     ---

113. 113 graphics2d.setFont(totalLabelFont); 

     ---

114. 114 double d9 = calculateSumOfPositiveValuesForCategory(categorydataset, j); 

     ---

115. 115 float f = (float) double1.getCenterX(); 

     ---

116. 116 float f2 = (float) double1.getMinY() - 4F; 

     ---

117. 117 TextAnchor textanchor = TextAnchor.BOTTOM_CENTER; 

     ---

118. 118 if (plotorientation == PlotOrientation.HORIZONTAL) { 

     ---

119. 119 f = (float) double1.getMaxX() + 4F; 

     ---

120. 120 f2 = (float) double1.getCenterY(); 

     ---

121. 121 textanchor = TextAnchor.CENTER_LEFT; 

     ---

122. 122 } 

     ---

123. 123 TextUtilities.drawRotatedString(totalFormatter.format(d9), graphics2d, f, f2, textanchor, 0.0D, TextAnchor.CENTER); 

     ---

124. 124 } 

     ---

125. 125 } else if (showNegativeTotal && isLastNegativeItem(categorydataset, i, j)) { 

     ---

126. 126 graphics2d.setPaint(Color.black); 

     ---

127. 127 graphics2d.setFont(totalLabelFont); 

     ---

128. 128 double d10 = calculateSumOfNegativeValuesForCategory(categorydataset, j); 

     ---

129. 129 float f1 = (float) double1.getCenterX(); 

     ---

130. 130 float f3 = (float) double1.getMaxY() + 4F; 

     ---

131. 131 TextAnchor textanchor1 = TextAnchor.TOP_CENTER; 

     ---

132. 132 if (plotorientation == PlotOrientation.HORIZONTAL) { 

     ---

133. 133 f1 = (float) double1.getMinX() - 4F; 

     ---

134. 134 f3 = (float) double1.getCenterY(); 

     ---

135. 135 textanchor1 = TextAnchor.CENTER_RIGHT; 

     ---

136. 136 } 

     ---

137. 137 TextUtilities.drawRotatedString(totalFormatter.format(d10), graphics2d, f1, f3, textanchor1, 0.0D, TextAnchor.CENTER); 

     ---

138. 138 } 

     ---

139. 139 if (categoryitemrendererstate.getInfo() != null) { 

     ---

140. 140 EntityCollection entitycollection = categoryitemrendererstate.getEntityCollection(); 

     ---

141. 141 if (entitycollection != null) { 

     ---

142. 142 String s = null; 

     ---

143. 143 CategoryToolTipGenerator categorytooltipgenerator = getToolTipGenerator(i, j); 

     ---

144. 144 if (categorytooltipgenerator != null) 

     ---

145. 145 s = categorytooltipgenerator.generateToolTip(categorydataset, i, j); 

     ---

146. 146 String s1 = null; 

     ---

147. 147 if (getItemURLGenerator(i, j) != null) 

     ---

148. 148 s1 = getItemURLGenerator(i, j).generateURL(categorydataset, i, j); 

     ---

149. 149 CategoryItemEntity categoryitementity = new CategoryItemEntity(double1, s, s1, categorydataset, categorydataset.getRowKey(i), categorydataset.getColumnKey(j)); 

     ---

150. 150 entitycollection.add(categoryitementity); 

     ---

151. 151 } 

     ---

152. 152 } 

     ---

153. 153 } 

     ---

154. 154 

     ---

155. 155 private boolean isLastPositiveItem(CategoryDataset categorydataset, int i, int j) { 

     ---

156. 156 boolean flag = true; 

     ---

157. 157 Number number = categorydataset.getValue(i, j); 

     ---

158. 158 if (number == null) 

     ---

159. 159 return false; 

     ---

160. 160 for (int k = i + 1; k < categorydataset.getRowCount(); k++) { 

     ---

161. 161 Number number1 = categorydataset.getValue(k, j); 

     ---

162. 162 if (number1 != null) 

     ---

163. 163 flag = flag && number1.doubleValue() <= 0.0D; 

     ---

164. 164 } 

     ---

165. 165 

     ---

166. 166 return flag; 

     ---

167. 167 } 

     ---

168. 168 

     ---

169. 169 private boolean isLastNegativeItem(CategoryDataset categorydataset, int i, int j) { 

     ---

170. 170 boolean flag = true; 

     ---

171. 171 Number number = categorydataset.getValue(i, j); 

     ---

172. 172 if (number == null) 

     ---

173. 173 return false; 

     ---

174. 174 for (int k = i + 1; k < categorydataset.getRowCount(); k++) { 

     ---

175. 175 Number number1 = categorydataset.getValue(k, j); 

     ---

176. 176 if (number1 != null) 

     ---

177. 177 flag = flag && number1.doubleValue() >= 0.0D; 

     ---

178. 178 } 

     ---

179. 179 

     ---

180. 180 return flag; 

     ---

181. 181 } 

     ---

182. 182 

     ---

183. 183 private double calculateSumOfPositiveValuesForCategory(CategoryDataset categorydataset, int i) { 

     ---

184. 184 double d = 0.0D; 

     ---

185. 185 for (int j = 0; j < categorydataset.getRowCount(); j++) { 

     ---

186. 186 Number number = categorydataset.getValue(j, i); 

     ---

187. 187 if (number == null) 

     ---

188. 188 continue; 

     ---

189. 189 double d1 = number.doubleValue(); 

     ---

190. 190 if (d1 > 0.0D) 

     ---

191. 191 d += d1; 

     ---

192. 192 } 

     ---

193. 193 

     ---

194. 194 return d; 

     ---

195. 195 } 

     ---

196. 196 

     ---

197. 197 private double calculateSumOfNegativeValuesForCategory(CategoryDataset categorydataset, int i) { 

     ---

198. 198 double d = 0.0D; 

     ---

199. 199 for (int j = 0; j < categorydataset.getRowCount(); j++) { 

     ---

200. 200 Number number = categorydataset.getValue(j, i); 

     ---

201. 201 if (number == null) 

     ---

202. 202 continue; 

     ---

203. 203 double d1 = number.doubleValue(); 

     ---

204. 204 if (d1 < 0.0D) 

     ---

205. 205 d += d1; 

     ---

206. 206 } 

     ---

207. 207 

     ---

208. 208 return d; 

     ---

209. 209 } 

     ---

210. 210 

     ---

211. 211} 

     ---

212. 212 

     ---

ExtendedStandardCategoryItemLabelGeneratory

1. 1package com.springapp.jfreechar; 

   ---

2. 2 

   ---

3. 3import org.jfree.chart.HashUtilities; 

   ---

4. 4import org.jfree.chart.labels.AbstractCategoryItemLabelGenerator; 

   ---

5. 5import org.jfree.chart.labels.StandardCategoryItemLabelGenerator; 

   ---

6. 6import org.jfree.data.DataUtilities; 

   ---

7. 7import org.jfree.data.category.CategoryDataset; 

   ---

8. 8import org.jfree.util.ObjectUtilities; 

   ---

9. 9import org.jfree.util.PublicCloneable; 

   ---

10. 10 

    ---

11. 11import java.io.Serializable; 

    ---

12. 12import java.text.DateFormat; 

    ---

13. 13import java.text.MessageFormat; 

    ---

14. 14import java.text.NumberFormat; 

    ---

15. 15 

    ---

16. 16public class ExtendedStandardCategoryItemLabelGeneratory extends StandardCategoryItemLabelGenerator implements PublicCloneable, Cloneable, Serializable { 

    ---

17. 17 

    ---

18. 18 private static final long serialVersionUID = -7108591260223293197L; 

    ---

19. 19 private String labelFormat; 

    ---

20. 20 private String nullValueString; 

    ---

21. 21 private NumberFormat numberFormat; 

    ---

22. 22 private DateFormat dateFormat; 

    ---

23. 23 private NumberFormat percentFormat; 

    ---

24. 24 //新增加了参数，柱体series的值是否是总值的百分比，还是仅仅将原来的小数转化为百分数 

    ---

25. 25 private boolean isPercent = false; 

    ---

26. 26 

    ---

27. 27 public ExtendedStandardCategoryItemLabelGeneratory(String labelFormat, NumberFormat formatter, NumberFormat percentFormatter,boolean isPercent){ 

    ---

28. 28 super(labelFormat, formatter, percentFormatter); 

    ---

29. 29 if(labelFormat == null) { 

    ---

30. 30 throw new IllegalArgumentException("Null \'labelFormat\' argument."); 

    ---

31. 31 } else if(formatter == null) { 

    ---

32. 32 throw new IllegalArgumentException("Null \'formatter\' argument."); 

    ---

33. 33 } else if(percentFormatter == null) { 

    ---

34. 34 throw new IllegalArgumentException("Null \'percentFormatter\' argument."); 

    ---

35. 35 } else { 

    ---

36. 36 this.labelFormat = labelFormat; 

    ---

37. 37 this.numberFormat = formatter; 

    ---

38. 38 this.percentFormat = percentFormatter; 

    ---

39. 39 this.dateFormat = null; 

    ---

40. 40 this.nullValueString = "-"; 

    ---

41. 41 if (isPercent) 

    ---

42. 42 this.isPercent = isPercent; 

    ---

43. 43 } 

    ---

44. 44 

    ---

45. 45 } 

    ---

46. 46 

    ---

47. 47 @Override 

    ---

48. 48 protected String generateLabelString(CategoryDataset dataset, int row, int column) { 

    ---

49. 49 if(dataset == null) { 

    ---

50. 50 throw new IllegalArgumentException("Null \'dataset\' argument."); 

    ---

51. 51 } else { 

    ---

52. 52 String result = null; 

    ---

53. 53 Object[] items = this.createItemArray(dataset, row, column); 

    ---

54. 54 result = MessageFormat.format(this.labelFormat, items); 

    ---

55. 55 return result; 

    ---

56. 56 } 

    ---

57. 57 } 

    ---

58. 58 @Override 

    ---

59. 59 protected Object[] createItemArray(CategoryDataset dataset, int row, int column) { 

    ---

60. 60 Object[] result = new Object[]{dataset.getRowKey(row).toString(), dataset.getColumnKey(column).toString(), null, null}; 

    ---

61. 61 Number value = dataset.getValue(row, column); 

    ---

62. 62 if(value != null) { 

    ---

63. 63 if(this.numberFormat != null) { 

    ---

64. 64 result[2] = this.numberFormat.format(value); 

    ---

65. 65 } else if(this.dateFormat != null) { 

    ---

66. 66 result[2] = this.dateFormat.format(value); 

    ---

67. 67 } 

    ---

68. 68 } else { 

    ---

69. 69 result[2] = this.nullValueString; 

    ---

70. 70 } 

    ---

71. 71 

    ---

72. 72 if(value != null) { 

    ---

73. 73 double total = DataUtilities.calculateColumnTotal(dataset, column); 

    ---

74. 74 // 

    ---

75. 75 double percent = 0D;// / total; 

    ---

76. 76 if (this.isPercent) 

    ---

77. 77 //StandardCategoryItemLabelGenerator 返回的值是百分比 

    ---

78. 78 percent = value.doubleValue() / total; 

    ---

79. 79 else 

    ---

80. 80 //返回自己原来的值 

    ---

81. 81 percent = value.doubleValue(); 

    ---

82. 82 //格式化 

    ---

83. 83 result[3] = this.percentFormat.format(percent); 

    ---

84. 84 } 

    ---

85. 85 

    ---

86. 86 return result; 

    ---

87. 87 } 

    ---

88. 88 

    ---

89. 89 

    ---

90. 90} 

    ---

91. 91 

    ---

StackedBarChartDemo3

1. 1package com.springapp.jfreechar; 

   ---

2. 2 

   ---

3. 3import java.awt.*; 

   ---

4. 4import java.text.DecimalFormat; 

   ---

5. 5import java.text.NumberFormat; 

   ---

6. 6import java.util.Iterator; 

   ---

7. 7 

   ---

8. 8import javax.swing.*; 

   ---

9. 9 

   ---

10. 10import com.sun.javafx.charts.Legend; 

    ---

11. 11import org.jfree.chart.*; 

    ---

12. 12import org.jfree.chart.axis.*; 

    ---

13. 13import org.jfree.chart.labels.*; 

    ---

14. 14import org.jfree.chart.plot.CategoryPlot; 

    ---

15. 15import org.jfree.chart.plot.PlotOrientation; 

    ---

16. 16import org.jfree.chart.title.LegendTitle; 

    ---

17. 17import org.jfree.data.category.CategoryDataset; 

    ---

18. 18import org.jfree.data.category.DefaultCategoryDataset; 

    ---

19. 19import org.jfree.ui.ApplicationFrame; 

    ---

20. 20import org.jfree.ui.RectangleEdge; 

    ---

21. 21import org.jfree.ui.RefineryUtilities; 

    ---

22. 22import org.jfree.ui.TextAnchor; 

    ---

23. 23 

    ---

24. 24// Referenced classes of package demo: 

    ---

25. 25// ExtendedStackedBarRenderer 

    ---

26. 26 

    ---

27. 27public class StackedBarChartDemo3 extends ApplicationFrame { 

    ---

28. 28 

    ---

29. 29 private static final long serialVersionUID = 1L; 

    ---

30. 30 

    ---

31. 31 public StackedBarChartDemo3(String s) { 

    ---

32. 32 super(s); 

    ---

33. 33 JPanel jpanel = createDemoPanel(); 

    ---

34. 34 jpanel.setPreferredSize(new Dimension(500, 270)); 

    ---

35. 35 setContentPane(jpanel); 

    ---

36. 36 } 

    ---

37. 37 

    ---

38. 38 private static CategoryDataset createDataset() { 

    ---

39. 39 DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset(); 

    ---

40. 40 defaultcategorydataset.addValue(.101D, "Series 1", "Cross Contamination (4.3)"); 

    ---

41. 41 defaultcategorydataset.addValue(.4D, "Series 2", "Cross Contamination (4.3)"); 

    ---

42. 42 return defaultcategorydataset; 

    ---

43. 43 } 

    ---

44. 44 

    ---

45. 45 private static JFreeChart createChart(CategoryDataset categorydataset) { 

    ---

46. 46 

    ---

47. 47 JFreeChart jfreechart = ChartFactory.createStackedBarChart("Stacked Bar Chart Demo 3", "Category", "Value", categorydataset, PlotOrientation.VERTICAL, true, true, false); 

    ---

48. 48 

    ---

49. 49 CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot(); 

    ---

50. 50 //柱体 

    ---

51. 51 ExtendedStackedBarRenderer extendedstackedbarrenderer = new ExtendedStackedBarRenderer(new DecimalFormat("#0.0%")); 

    ---

52. 52 //柱体标签是否可见 

    ---

53. 53 extendedstackedbarrenderer.setBaseItemLabelsVisible(true); 

    ---

54. 54 Font labelFont = new Font("Arial", Font.PLAIN, 12); 

    ---

55. 55 extendedstackedbarrenderer.setBaseItemLabelPaint(new GradientPaint(0.0f, 0.0f, new Color(255, 255, 255), 0.0f, 0.0f, new Color(0, 0, 0))); 

    ---

56. 56 //设置柱体标签值的格式 

    ---

57. 57 ExtendedStandardCategoryItemLabelGeneratory generator = new ExtendedStandardCategoryItemLabelGeneratory("{3}", 

    ---

58. 58 NumberFormat.getPercentInstance(), new DecimalFormat("#0.0%"),false); 

    ---

59. 59 extendedstackedbarrenderer.setBaseItemLabelGenerator(generator); 

    ---

60. 60 //自定义柱体颜色 

    ---

61. 61 Paint p0 = new GradientPaint(0.0f, 0.0f, new Color(237, 125, 49), 0.0f, 0.0f, new Color(237, 125, 49)); 

    ---

62. 62 extendedstackedbarrenderer.setSeriesPaint(0, p0); 

    ---

63. 63 Paint p1 = new GradientPaint(0.0f, 0.0f, new Color(91, 155, 213), 0.0f, 0.0f, new Color(91, 155, 213)); 

    ---

64. 64 extendedstackedbarrenderer.setSeriesPaint(1, p1); 

    ---

65. 65 

    ---

66. 66 categoryplot.setRenderer(extendedstackedbarrenderer); 

    ---

67. 67 

    ---

68. 68 //Y 轴 

    ---

69. 69 NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis(); 

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70. 70 //不设置是自动显示步长 

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71. 71 numberaxis.setTickUnit(new NumberTickUnit(0.05)); 

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72. 72 numberaxis.setLowerMargin(0.14999999999999999D); 

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73. 73 numberaxis.setUpperMargin(0.14999999999999999D); 

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74. 74 //设置是否是百分率 

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75. 75 numberaxis.setNumberFormatOverride(NumberFormat.getPercentInstance()); 

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76. 76 

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77. 77 //X 辆 

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78. 78 CategoryAxis categoryAxis = categoryplot.getDomainAxis(); 

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79. 79 //x轴旋转 

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80. 80 categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 6.0)); 

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81. 81 

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82. 82 //标注 

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83. 83 LegendTitle legendtitle = (LegendTitle)jfreechart.getLegend(); 

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84. 84 legendtitle.setBorder(0, 0, 0, 0); 

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85. 85 return jfreechart; 

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86. 86 } 

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87. 87 

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88. 88 public static JPanel createDemoPanel() { 

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89. 89 JFreeChart jfreechart = createChart(createDataset()); 

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90. 90 return new ChartPanel(jfreechart); 

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91. 91 } 

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92. 92 

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93. 93 public static void main(String args[]) { 

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94. 94 StackedBarChartDemo3 stackedbarchartdemo3 = new StackedBarChartDemo3("Stacked Bar Chart Demo 3"); 

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95. 95 stackedbarchartdemo3.pack(); 

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96. 96 RefineryUtilities.centerFrameOnScreen(stackedbarchartdemo3); 

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97. 97 stackedbarchartdemo3.setVisible(true); 

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98. 98 } 

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99. 99} 

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100. 100 

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101. 101 

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