java画折线图和柱状图结合的综合图(用jfreechart)

最近项目增加了需求，想要下载折线图和柱状图结合的综合图。我查了一会儿，要实现这个功能，我使用了这两个第三方包了：

jfreechart-1.0.19.jar

jcommon-1.0.23.jar

效果：



步骤：

①、导入其相应的 jcommon-1.0.23.jar和 jfreechart-1.0.19.jar文件

②、下面就可以写实现功能的代码了

import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis3D;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis3D;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.DatasetRenderingOrder;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.data.category.DefaultCategoryDataset;

public class test {

public static void main(String[] args) {

//折线图数据
DefaultCategoryDataset lineDataset = new DefaultCategoryDataset();
//添加数据
lineDataset.addValue(9, "", "语文");
lineDataset.addValue(7, "", "数学");
lineDataset.addValue(6, "", "英语");
lineDataset.addValue(4, "", "物理");
lineDataset.addValue(3, "", "化学");
lineDataset.addValue(2, "", "生物");

//柱状图数据
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
//添加数据
dataset.addValue(4, "", "语文");
dataset.addValue(7, "", "数学");
dataset.addValue(6, "", "英语");
dataset.addValue(5, "", "物理");
dataset.addValue(3, "", "化学");
dataset.addValue(9, "", "生物");

//生成的柱状图
JFreeChart chart = ChartFactory.createBarChart3D(
"科目成绩",
"科目",//X轴的标签
"分数",//Y轴的标签
dataset, //图标显示的数据集合
PlotOrientation.VERTICAL, //图像的显示形式（水平或者垂直）
false,//是否显示子标题
false,//是否生成提示的标签
false); //是否生成URL链接

/*
* 处理图形上的乱码
*/

//处理主标题的乱码
chart.getTitle().setFont(new Font("黑体",Font.BOLD,18));

//获取图表区域对象
CategoryPlot categoryPlot = (CategoryPlot)chart.getPlot();

//获取X轴的对象
CategoryAxis3D categoryAxis3D = (CategoryAxis3D)categoryPlot.getDomainAxis();

//获取Y轴的对象
NumberAxis3D numberAxis3D = (NumberAxis3D)categoryPlot.getRangeAxis();

//处理X轴上的乱码
categoryAxis3D.setTickLabelFont(new Font("黑体",Font.BOLD,10));

//处理X轴外的乱码
categoryAxis3D.setLabelFont(new Font("黑体",Font.BOLD,10));

//处理Y轴上的乱码
numberAxis3D.setTickLabelFont(new Font("黑体",Font.BOLD,10));

//处理Y轴外的乱码
numberAxis3D.setLabelFont(new Font("黑体",Font.BOLD,10));

//自定义Y轴上显示的刻度，以10作为1格
numberAxis3D.setAutoTickUnitSelection(false);
NumberTickUnit unit = new NumberTickUnit(1);
numberAxis3D.setTickUnit(unit);

//获取绘图区域对象
BarRenderer3D barRenderer3D = (BarRenderer3D)categoryPlot.getRenderer();

//设置柱形图的宽度
barRenderer3D.setMaximumBarWidth(0.07);

//在图形上显示数字
barRenderer3D.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
barRenderer3D.setBaseItemLabelsVisible(true);
barRenderer3D.setBaseItemLabelFont(new Font("宋体",Font.BOLD,10));

/*
* 放折线图数据
*/
categoryPlot.setDataset(1, lineDataset);
//设置折线
LineAndShapeRenderer lineandshaperenderer = new LineAndShapeRenderer();
lineandshaperenderer.setToolTipGenerator(new StandardCategoryToolTipGenerator());
categoryPlot.setRenderer(1, lineandshaperenderer);
// 柱状图和纵轴紧靠
categoryAxis3D.setLowerMargin(0.0);

categoryAxis3D.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
//折线在柱面前面显示
categoryPlot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);

/*
* 在E盘目录下生成图片
*/
File file = new File("e:\\a.png");
try {
ChartUtilities.saveChartAsJPEG(file, chart, 800, 600);
} catch (IOException e) {
e.printStackTrace();
}

}

}