http://sktoo.javaeye.com/blog/249122

（ 1 ）平面线图

       生成平面线图：

Java代码
1.JFreeChart chart = ChartFactory. createLineChart(String title,  // 图标题   
2.                  String categoryAxisLabel,         //x 轴标题   
3.                  String valueAxisLabel,            //y 轴标题   
4.                  CategoryDataset dataset,           // 数据源   
5.                  PlotOrientation orientation,         // 显示方向   
6.                  boolean legend,                 // 是否显示图例   
7.                  boolean tooltips,                 // 是否显示 tooltip   
8.                  boolean urls);                  // 是否指定 url  
       JFreeChart chart = ChartFactory. createLineChart(String title,  // 图标题
                         String categoryAxisLabel,         //x 轴标题
                         String valueAxisLabel,            //y 轴标题
                         CategoryDataset dataset,           // 数据源
                         PlotOrientation orientation,         // 显示方向
                         boolean legend,                 // 是否显示图例
                         boolean tooltips,                 // 是否显示 tooltip
                         boolean urls);                  // 是否指定 url 

平面线图除了的 Plot 对象中绘制单元对象是 LineAndShapeRenderer 对象，其他一切组成对象与平面柱状图相同。
获取 Renderer 操作：

Java代码
1.LineAndShapeRenderer renderer=(LineAndShapeRenderer) plot.getRenderer();  
LineAndShapeRenderer renderer=(LineAndShapeRenderer) plot.getRenderer(); 

其他参考平面柱状图。
（ 2 ） 3D 线图

对应工厂方法为 createLineChart3D ，参数与 createLineChart 相同。 3D 线图的组成对象除了绘制单元对象是 LineAndShapeRenderer3D 对象，其他一切组成对象与 3D 柱状图相同。

Java代码
1.import org.jfree.chart.ChartFactory;  
2.import org.jfree.chart.ChartFrame;  
3.import org.jfree.chart.JFreeChart;  
4.import org.jfree.chart.plot.PlotOrientation;  
5.import org.jfree.data.xy.XYSeries;  
6.import org.jfree.data.xy.XYSeriesCollection;  
7. 
8.public class TestLineChart {  
9. 
10.    public static XYSeriesCollection createDataSet() {  
11.        XYSeriesCollection seriesCollection = new XYSeriesCollection();  
12.        XYSeries series1 = new XYSeries("平均收视率");  
13.        XYSeries series2 = new XYSeries("最高收视率");  
14.        XYSeries series3 = new XYSeries("最低收视率");  
15. 
16.        series1.add(1, 7.25);  
17.        series1.add(2, 4.81);  
18.        series1.add(3, 3.69);  
19.        series1.add(4, 3.53);  
20.        series1.add(5, 2.95);  
21.        series1.add(6, 3.96);  
22. 
23.        series2.add(1, 10.57);  
24.        series2.add(2, 5.37);  
25.        series2.add(3, 4.87);  
26.        series2.add(4, 4.87);  
27.        series2.add(5, 3.63);  
28.        series2.add(6, 5.27);  
29.        series3.add(1, 4.76);  
30.        series3.add(2, 3.63);  
31.        series3.add(3, 2.82);  
32.        series3.add(4, 2.82);  
33.        series3.add(5, 2.37);  
34.        series3.add(6, 3.33);  
35.        seriesCollection.addSeries(series1);  
36.        seriesCollection.addSeries(series2);  
37.        seriesCollection.addSeries(series3);  
38.        return seriesCollection;  
39.    }  
40. 
41.    public static  void createLineChart() {  
42.        JFreeChart chart = ChartFactory.createXYLineChart("无敌珊宝妹收视率走势图", "集数",  
43.                "收视率百分点", createDataSet(), PlotOrientation.VERTICAL, true,  
44.                true, false);  
45.        ChartFrame frame=new ChartFrame("Test Line Chart",chart);  
46.        frame.pack();  
47.        frame.setVisible(true);  
48.    }  
49.    public static void main(String[] args) {  
50.    createLineChart();    
51.    }  
52.} 
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

public class TestLineChart {

public static XYSeriesCollection createDataSet() {
XYSeriesCollection seriesCollection = new XYSeriesCollection();
XYSeries series1 = new XYSeries("平均收视率");
XYSeries series2 = new XYSeries("最高收视率");
XYSeries series3 = new XYSeries("最低收视率");

series1.add(1, 7.25);
series1.add(2, 4.81);
series1.add(3, 3.69);
series1.add(4, 3.53);
series1.add(5, 2.95);
series1.add(6, 3.96);

series2.add(1, 10.57);
series2.add(2, 5.37);
series2.add(3, 4.87);
series2.add(4, 4.87);
series2.add(5, 3.63);
series2.add(6, 5.27);
series3.add(1, 4.76);
series3.add(2, 3.63);
series3.add(3, 2.82);
series3.add(4, 2.82);
series3.add(5, 2.37);
series3.add(6, 3.33);
seriesCollection.addSeries(series1);
seriesCollection.addSeries(series2);
seriesCollection.addSeries(series3);
return seriesCollection;
}

public static  void createLineChart() {
JFreeChart chart = ChartFactory.createXYLineChart("无敌珊宝妹收视率走势图", "集数",
"收视率百分点", createDataSet(), PlotOrientation.VERTICAL, true,
true, false);
ChartFrame frame=new ChartFrame("Test Line Chart",chart);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
createLineChart();
}
}


效果图