jfreechart demo

写道

package com.ijo.demo;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.geom.Ellipse2D;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.annotations.XYBoxAnnotation;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

public class CreateJFreeChartXYLineTest {

public static void main(String[] args) {
CreateJFreeChartXYLineTest test = new CreateJFreeChartXYLineTest();
test.jFreeChar();
}

/**
* 创建JFreeChart LineXY Chart（折线图）
*/
public void jFreeChar() {
// 步骤1：创建XYDataset对象（准备数据）
XYDataset dataset = createXYDataset();
// 步骤2：根据Dataset 生成 JFreeChart对象，以及做相应的设置
JFreeChart freeChart = createChart(dataset);
// 步骤3：将JFreeChart对象输出到文件，Servlet输出流等
saveAsFile(freeChart, "C:\\Documents and Settings\\zhao\\桌面\\1.png",
800, 600);
}

// 保存为文件
public static void saveAsFile(JFreeChart chart, String outputPath,
int weight, int height) {
FileOutputStream out = null;
try {
File outFile = new File(outputPath);
if (!outFile.getParentFile().exists()) {
outFile.getParentFile().mkdirs();
}
out = new FileOutputStream(outputPath);
// 保存为PNG
ChartUtilities.writeChartAsPNG(out, chart, weight, height);
out.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
// do nothing
}
}
}
}

// 根据XYDataset创建JFreeChart对象
public static JFreeChart createChart(XYDataset dataset) {
// 创建JFreeChart对象：ChartFactory.createXYLineChart
JFreeChart jfreechart = ChartFactory.createXYLineChart(
"XYLine Chart Demo", // 标题
"", // categoryAxisLabel （category 轴，横轴，X轴标签）
"", // valueAxisLabel（value 轴，纵轴，Y轴的标签）
dataset, // dataset
PlotOrientation.VERTICAL, true, // legend
false, // tooltips
false); // URLs

// 使用CategoryPlot设置各种参数。以下设置可以省略。
XYPlot plot = jfreechart.getXYPlot();
XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot
.getRenderer();
// set line color
// plot.setDrawingSupplier(new DefaultDrawingSupplier(new
// Paint[]{Color.BITMASK}));
// 设置第一条线有数据点

renderer.setSeriesLinesVisible(0, false);
renderer.setSeriesLinesVisible(1, true);
renderer.setSeriesLinesVisible(2, true);

renderer.setSeriesShapesVisible(0, true);
renderer.setSeriesShapesVisible(1, true);
renderer.setSeriesShapesVisible(2, true);

renderer.setSeriesPaint(0, new Color(204, 255, 255));
renderer.setSeriesPaint(1, new Color(153, 204, 255));
renderer.setSeriesPaint(2, new Color(51, 204, 204));

renderer.setSeriesFillPaint(0, new Color(204, 255, 255));
renderer.setSeriesFillPaint(1, new Color(153, 204, 255));
renderer.setSeriesFillPaint(2, new Color(51, 204, 204));

renderer.setSeriesStroke(0, new BasicStroke(5f));
renderer.setSeriesStroke(1, new BasicStroke(10f));
renderer.setSeriesStroke(2, new BasicStroke(1.5f));

// 可以重新设置数据点颜色默认为白色方形
renderer.setUseFillPaint(true);
// 设置数据点为圆形(x为上下偏离，y为左右偏离，w为圆形左右距离，h为圆形上下距离)
renderer.setSeriesShape(0, new Ellipse2D.Double(0, 0, Math.abs(25), Math
.abs(25)));
// 其它设置可以参考XYPlot类
// AbstractRenderer
XYBoxAnnotation box = new XYBoxAnnotation(0, 0, 1990, 60);
plot.addAnnotation(box);
plot.setRangeGridlinesVisible(false);
plot.setDomainGridlinesVisible(false);
ValueAxis domainAxis = plot.getDomainAxis();// x
ValueAxis rangeAxis = plot.getRangeAxis();// y
domainAxis.setVisible(false);
rangeAxis.setUpperBound(2000);
rangeAxis.setVisible(false);
rangeAxis.setUpperBound(50);
return jfreechart;
}

/**
* 创建XYDataset对象
*/
private static XYDataset createXYDataset() {
XYSeries xyseries1 = new XYSeries("");
xyseries1.add(1980, 50);
xyseries1.add(1981, 49);
xyseries1.add(1982, 48);
xyseries1.add(1983, 47);
xyseries1.add(1984, 46);
xyseries1.add(1985, 45);
xyseries1.add(1986, 44);
xyseries1.add(1987, 43);
xyseries1.add(1988, 42);
xyseries1.add(1989, 41);
xyseries1.add(1990, 40);
xyseries1.add(1991, 39);
xyseries1.add(1992, 38);
xyseries1.add(1993, 37);
xyseries1.add(1994, 36);
xyseries1.add(1995, 35);
xyseries1.add(1996, 34);
xyseries1.add(1997, 33);
xyseries1.add(1998, 32);
xyseries1.add(2001, 33);
xyseries1.add(2002, 34);
xyseries1.add(2003, 35);
xyseries1.add(2004, 36);

XYSeries xyseries2 = new XYSeries("");
xyseries2.add(1987, 40);
xyseries2.add(1997, 30.0008);
xyseries2.add(2007, 38.24);

XYSeries xyseries3 = new XYSeries("");
for (int i = 1980; i < 2007; i++) {
Random rand = new Random();
xyseries3.add(i, rand.nextInt(50));
}

XYSeriesCollection xySeriesCollection = new XYSeriesCollection();

xySeriesCollection.addSeries(xyseries1);
xySeriesCollection.addSeries(xyseries2);
xySeriesCollection.addSeries(xyseries3);

return xySeriesCollection;
}

}