在JFreeChart中删除杆和轴线之间的分隔

JFreeChart chart = ChartFactory.createBarChart("柱状图", "X轴", "Y轴", dataset, PlotOrientation.VERTICAL, true, true, false);

CategoryPlot plot = (CategoryPlot) chart.getPlot();

BarRenderer renderer = (BarRenderer) plot.getRenderer();

renderer.setBaseOutlinePaint(new Color(0, 0, 0, 0)); // 设置分隔线颜色为透明

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.data.category.DefaultCategoryDataset;

import java.awt.*;

public class BarChartExample {
    public static void main(String[] args) {
        // 创建数据集
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(1, "Series 1", "Category 1");
        dataset.addValue(2, "Series 1", "Category 2");
        dataset.addValue(3, "Series 1", "Category 3");

        // 创建柱状图
        JFreeChart chart = ChartFactory.createBarChart("柱状图", "X轴", "Y轴", dataset, PlotOrientation.VERTICAL, true, true, false);

        // 获取绘图区域对象
        CategoryPlot plot = (CategoryPlot) chart.getPlot();

        // 获取渲染器对象
        BarRenderer renderer = (BarRenderer) plot.getRenderer();

        // 设置分隔线颜色为透明
        renderer.setBaseOutlinePaint(new Color(0, 0, 0, 0));

        // 显示图表
        ChartFrame frame = new ChartFrame("柱状图示例", chart);
        frame.pack();
        frame.setVisible(true);
    }
}