JFreeChar柱状图
【1. 使用默认数据集生成柱状图】
【测试用例】
- /** 默认数据集*/
- @Test
- public void test_1() {
- DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
- dataSet.addValue(100, "北京", "苹果");
- dataSet.addValue(200, "北京", "香蕉");
- dataSet.addValue(300, "北京", "鸭梨");
- dataSet.addValue(400, "北京", "橘子");
- JFreeChart jfreeChart = ChartFactory.createBarChart3D("水果销售图", "水果", "销售", dataSet, PlotOrientation.VERTICAL, true,true, true);
- TestUtil.printPng(jfreeChart,"1.1 柱状图显示_默认数据集");
- }
【生成图片】
【2. 使用自定义数据集生成柱状图】
【测试用例】
- /** 自定义数据集 */
- @Test
- public void test_2(){
- double[][] data = new double[][]{
- {150,200,250,500},
- {200,250,300,550},
- {175,275,375,475},
- {225,200,325,525}
- };
- String[] rowKeys = new String[]{"北京","上海","香港","澳门"};
- String[] columnKeys = new String[]{"苹果","鸭梨","橘子","香蕉"};
- CategoryDataset dataSet = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
- JFreeChart jfreeChart = ChartFactory.createBarChart3D("水果销售图", "水果", "销售", dataSet, PlotOrientation.VERTICAL, true, true, true);
- TestUtil.printPng(jfreeChart, "1.2 柱状图显示_自定义数据集");
- }
【生成图片】
【3. 自定义柱状图样式】
【测试用例】
- /** 自定义 样式 */
- @Test
- public void test_3(){
- double[][] data = new double[][]{
- {150,200,250,500},
- {200,250,300,550},
- {175,275,375,475},
- {225,200,325,525}
- };
- String[] rowKeys = new String[]{"北京","上海","香港","澳门"};
- String[] columnKeys = new String[]{"苹果","鸭梨","橘子","香蕉"};
- CategoryDataset dataSet = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
- JFreeChart jfreeChart = ChartFactory.createBarChart3D("水果销售图", "水果", "销售", dataSet, PlotOrientation.VERTICAL, true, true, true);
- CategoryPlot plot=jfreeChart.getCategoryPlot();
- // 设置网格背景颜色
- plot.setBackgroundPaint(Color.white);
- // 设置网格竖线颜色
- plot.setDomainGridlinePaint(Color.pink);
- // 设置网格横线颜色
- plot.setRangeGridlinePaint(Color.pink);
- // 显示每个柱的数值，并修改该数值的字体属性
- BarRenderer3D renderer=new BarRenderer3D();
- renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
- renderer.setBaseItemLabelsVisible(true);
- renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
- renderer.setItemLabelAnchorOffset(10D);
- // 设置平行柱的之间距离
- renderer.setItemMargin(0.4);
- plot.setRenderer(renderer);
- TestUtil.printPng(jfreeChart, "1.3 柱状图显示_自定义样式");
- }
【生成图片】