JFreeChart设置柱状图的宽度, 禁止缩放

1 原来代码和效果

public class BarChartDemoPanel extends JPanel { private static final long serialVersionUID = 1L; public BarChartDemoPanel() { setLayout(new BorderLayout()); JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 0, 60)); topPanel.setBorder(BorderFactory.createTitledBorder("柱状图：")); CategoryDataset dataset1 = getDataSet1(); ChartPanel charPanel1 = getChartPanel(dataset1); charPanel1.setPreferredSize(new Dimension(400, 400)); topPanel.add(charPanel1); add(topPanel, BorderLayout.NORTH); } /** * @param args */ public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new BarChartDemoPanel()); frame.setExtendedState(JFrame.MAXIMIZED_BOTH); frame.setVisible(true); } /** * 获取一个演示用的简单数据集对象 * * @return */ private CategoryDataset getDataSet1() { DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(100, "北京", "苹果"); // dataset.addValue(200, "北京", "梨子"); // dataset.addValue(300, "北京", "葡萄"); // dataset.addValue(400, "北京", "香蕉"); // dataset.addValue(500, "北京", "荔枝"); return dataset; } private JFreeChart getBarChart(CategoryDataset dataset) { JFreeChart chart = ChartFactory.createBarChart3D("水果产量图", // 图表标题 "水果", // 目录轴的显示标签 "产量", // 数值轴的显示标签 dataset, // 数据集 PlotOrientation.VERTICAL, // 图表方向：水平、垂直 true, // 是否显示图例(对于简单的柱状图必须是false) true, // 是否生成工具 false // 是否生成URL链接 ); chart.setBackgroundPaint(SystemColor.controlHighlight); // 设置图标标题字体 chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 20)); CategoryPlot plot = chart.getCategoryPlot(); // 设置横轴标题字体 plot.getDomainAxis().setLabelFont(new Font("宋体", Font.PLAIN, 14)); plot.getDomainAxis().setCategoryLabelPositions( CategoryLabelPositions.UP_45); // 设置横轴标记的字体 plot.getDomainAxis().setTickLabelFont(new Font("宋体", Font.PLAIN, 12)); // 设置横轴标记字体颜色 plot.getDomainAxis().setTickLabelPaint(Color.RED); // 设置纵轴标题字体 plot.getRangeAxis().setLabelFont(new Font("宋体", Font.PLAIN, 14)); // 设置纵轴标记字体 NumberAxis3D numberAxis3D = (NumberAxis3D) plot.getRangeAxis(); numberAxis3D .setStandardTickUnits(NumberAxis3D.createIntegerTickUnits()); numberAxis3D.setTickLabelPaint(Color.RED); // 设置图例字体 BarRenderer3D renderer3D = (BarRenderer3D) plot.getRenderer(); renderer3D.setBaseLegendTextFont(new Font("宋体", Font.PLAIN, 14)); renderer3D.setSeriesPaint(0, Color.ORANGE); // int k = dataset.getColumnCount(); // if (k == 1) { // plot.getDomainAxis().setLowerMargin(0.26); // plot.getDomainAxis().setUpperMargin(0.66); // } else if (k < 6) { // double margin = (1.0 - k * 0.08) / 3; // plot.getDomainAxis().setLowerMargin(margin); // plot.getDomainAxis().setUpperMargin(margin); // // domainAxis.setCategoryMargin(0.1); // ((BarRenderer3D) plot.getRenderer()).setItemMargin(margin); // } else { // ((BarRenderer3D) plot.getRenderer()).setItemMargin(0.1); // } return chart; } private ChartPanel getChartPanel(CategoryDataset dataset) { JFreeChart chart = getBarChart(dataset); ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPopupMenu(null);// 不显示弹出菜单 return chartPanel; } }

 

效果

 

 

2 修改后的代码和效果，删掉注释部分的代码：

 

 

 

3 禁止缩放

chartPanel.setMouseZoomable(false);