用JFreeeChart绘制波形图/折线图。
参考：http://javapub.iteye.com/blog/757685
前提：导入需要的2个jar文件，jcommon-版本号.jar,jfreechart-版本号.jar。
import java.awt.Dimension;
import java.awt.Font;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.block.BlockContainer;
import org.jfree.chart.block.BorderArrangement;
import org.jfree.chart.block.EmptyBlock;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.CompositeTitle;
import org.jfree.chart.title.LegendTitle;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.RectangleEdge;
public class PaintPlotLine {
String xName = "";
String yName = "";
String plotName = "";
String xySeriesName = "";
String dataPath = "";
/**
*
* @param xName
* X轴名称
* @param yName
* Y轴名称
* @param plotName
* 图名
* @param xySeriesName
* 图示名
* @param dataPath
* 数据文件位置
*/
public PaintPlotLine(String yName, String xName, String plotName,
String xySeriesName, String dataPath) {
this.xName = xName;
this.yName = yName;
this.plotName = plotName;
this.xySeriesName = xySeriesName;
this.dataPath = dataPath;
}
/**
* 从数据文件中读取数据，文件中数据是由空格分隔的，数据必须是数字
* @param fileURL 文件位置
* @return 独到的数据构成的数组
*/
public double[] getDataFromFile(String fileURL) {
FileReader reader;
List<Double> list = new ArrayList<Double>();
StringBuffer sb = new StringBuffer();
try {
reader = new FileReader(fileURL);
int b;
while ((b = reader.read()) != -1) {
sb.append((char) b);
}
reader.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
String dataString = null;
if (sb != null) {
dataString = sb.toString().trim();
}
//将读到的数据存入字符串数组中
String dataArray[] = dataString.split(" ");
//去除数组中的数据前后空格
for (int i = 0; i < dataArray.length; i++) {
dataArray[i] = dataArray[i].trim();
}
//解析字符串数组，得到对应的数字
for (int i = 0; i < dataArray.length; i++) {
//数据不为"" ," ",null才作解析
if (!"".equals(dataArray[i]) && !" ".equals(dataArray[i])
&& !dataArray[i].equals(null)) {
double d = Double.parseDouble(dataArray[i]);
list.add(new Double(d));
}
}
double dataArrayD[] = new double[list.size()];
for (int i = 0; i < list.size(); i++) {
dataArrayD[i] = list.get(i).doubleValue();
}
return dataArrayD;
}
public XYDataset createDataset1(String xySeriesName, String path) {
XYSeries xyseries = new XYSeries(xySeriesName);
double[] dataArrayD = getDataFromFile(path);
int dataLen = dataArrayD.length;
for (int i = 0; i < dataLen; i++) {
xyseries.add(i, dataArrayD[i]);
}
XYSeriesCollection xyseriescollection = new XYSeriesCollection();
xyseriescollection.addSeries(xyseries);
return xyseriescollection;
}
public JFreeChart createChart(String xName, String yName, String plotName,
String xySeriesName, String path) {
XYDataset xydataset = createDataset1(xySeriesName, path);
// ///--------------
// 创建主题样式
StandardChartTheme standardChartTheme = new StandardChartTheme("CN"); // 设置标题字体
standardChartTheme.setExtraLargeFont(new Font("隶书", Font.BOLD, 20)); // 设置图例的字体
standardChartTheme.setRegularFont(new Font("宋书", Font.PLAIN, 15)); // 设置轴向的字体
standardChartTheme.setLargeFont(new Font("宋书", Font.PLAIN, 15)); // 应用主题样式
ChartFactory.setChartTheme(standardChartTheme);
// ///------------------
JFreeChart jfreechart = ChartFactory.createXYLineChart(plotName, xName,
yName, xydataset, PlotOrientation.VERTICAL, false, true, false);
XYPlot xyplot = (XYPlot) jfreechart.getPlot();
NumberAxis numberaxis = (NumberAxis) xyplot.getRangeAxis();
numberaxis.setAutoRangeIncludesZero(false);
xyplot.mapDatasetToRangeAxis(1, 1);
XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) xyplot
.getRenderer();
LegendTitle legendtitle = new LegendTitle(xylineandshaperenderer);
BlockContainer blockcontainer = new BlockContainer(
new BorderArrangement());
blockcontainer.add(legendtitle, RectangleEdge.LEFT);
blockcontainer.add(new EmptyBlock(2000D, 0.0D));
CompositeTitle compositetitle = new CompositeTitle(blockcontainer);
compositetitle.setPosition(RectangleEdge.BOTTOM);
jfreechart.addSubtitle(compositetitle);
return jfreechart;
}
public JPanel createDemoPanel() {
JFreeChart jfreechart = createChart(xName, yName, plotName,
xySeriesName, dataPath);
return new ChartPanel(jfreechart);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
//路径按实际情况改，此处使用的绝对路径，可改成相对路径
String dataPath = "C:\\Users\\Mao\\Desktop\\chanel0-index0.txt";
JPanel panel = new PaintPlotLine("waveLength/nm", "时间", "波形图", "波长",
dataPath).createDemoPanel();
frame.add(panel);
frame.setVisible(true);
frame.setSize(new Dimension(500, 500));
frame.setDefaultCloseOperation(3);
}
}
jfreechart的版本过高可能会是的汉字出现乱码。其中解决方案如下：
// ///--------------
// 创建主题样式
StandardChartTheme standardChartTheme = new StandardChartTheme("CN"); // 设置标题字体
standardChartTheme.setExtraLargeFont(new Font("隶书", Font.BOLD, 20)); // 设置图例的字体
standardChartTheme.setRegularFont(new Font("宋书", Font.PLAIN, 15)); // 设置轴向的字体
standardChartTheme.setLargeFont(new Font("宋书", Font.PLAIN, 15)); // 应用主题样式
ChartFactory.setChartTheme(standardChartTheme);
// ///------------------