JFreeChart使用

画直方图：

package Util;


import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;

import java.awt.*;

/**
 * Created by KPL on 2018/12/10.
 */
public class ChartUtil {
    public static CategoryDataset createDataset(){
        // 实例化DefaultCategoryDataset对象
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        // 向数据集合中添加数据
        dataset.addValue(500, "Java图书", "J2SE类");
        dataset.addValue(100, "Java图书", "J2ME类");
        dataset.addValue(900, "Java图书", "J2EE类");

        return dataset;
    }
    public static JFreeChart createChart() {
        StandardChartTheme standardChartTheme = new StandardChartTheme("CN"); //创建主题样式
        standardChartTheme.setExtraLargeFont(new Font("隶书", Font.BOLD, 20)); //设置标题字体
        standardChartTheme.setRegularFont(new Font("宋体", Font.PLAIN, 15)); //设置图例的字体
        standardChartTheme.setLargeFont(new Font("宋体", Font.PLAIN, 15)); //设置轴向的字体
        ChartFactory.setChartTheme(standardChartTheme);//设置主题样式
        // 通过ChartFactory创建JFreeChart
        JFreeChart chart = ChartFactory.createBarChart3D(
                "Java图书销量统计",   //图表标题
                "Java图书",          //横轴标题
                "销量（本）",         //纵轴标题
                createDataset(),     //数据集合
                PlotOrientation.VERTICAL, //图表方向
                true,   //是否显示图例标识
                false,  //是否显示tooltips
                false); //是否支持超链接
        return chart;

    }
    // 本地测试
    public static void main(String[] args) {
        ChartFrame cf = new ChartFrame("Test", createChart());
        cf.pack();
        cf.setVisible(true);
    }
}

画折线图：

 public static CategoryDataset GetDataset()
  {
        DefaultCategoryDataset mDataset = new DefaultCategoryDataset();
        mDataset.addValue(1, "First", "2013");
        mDataset.addValue(3, "First", "2014");
        mDataset.addValue(2, "First", "2015");
        mDataset.addValue(6, "First", "2016");
        mDataset.addValue(5, "First", "2017");
        mDataset.addValue(12, "First", "2018");
        return mDataset;
  }
   // 本地测试
  public static void main(String[] args) {
        StandardChartTheme mChartTheme = new StandardChartTheme("CN");
        mChartTheme.setLargeFont(new Font("黑体", Font.BOLD, 20));
        mChartTheme.setExtraLargeFont(new Font("宋体", Font.PLAIN, 15));
        mChartTheme.setRegularFont(new Font("宋体", Font.PLAIN, 15));
        ChartFactory.setChartTheme(mChartTheme);
        CategoryDataset mDataset = GetDataset();
        JFreeChart mChart = ChartFactory.createLineChart(
                "折线图",    //图名字
                "年份",      //横坐标
                "数量",      //纵坐标
                mDataset,   //数据集
                PlotOrientation.VERTICAL,
                true,       //显示图例
                true,       //采用标准生成器
                false);     //是否生成超链接

        CategoryPlot mPlot = (CategoryPlot)mChart.getPlot();
        mPlot.setBackgroundPaint(Color.LIGHT_GRAY);
        mPlot.setRangeGridlinePaint(Color.BLUE);//背景底部横虚线
        mPlot.setOutlinePaint(Color.RED);   //边界线

        ChartFrame mChartFrame = new ChartFrame("折线图", mChart);
        mChartFrame.pack();
        mChartFrame.setVisible(true);
  }