我有一个 CSV 文件，看起来像这样（文件可以在这里下载）
我想用 X 轴上的时间（电子表格中的第一列）和 Y 轴上的开关名称（除第一列之外的所有列标题）来绘制它。我希望为每一列在 Y 轴上创建一个点。该列将与 X 轴水平，但颜色应根据值 TRUE 或 FALSE 或 0、1、2 更改。
这是我到目前为止开发的：
package democsv;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
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;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
public class DemoCSV extends ApplicationFrame {
public static List<Object> sections = new ArrayList<>();
public static String[] switchNames = null;
public static ArrayList<String> time = new ArrayList<>();
public static ArrayList<ArrayList<String>> datastore = new ArrayList<>();
public DemoCSV(String applicationTitle, String chartTitle) throws IOException {
super(applicationTitle);
InputStream in = DemoCSV.class.getResourceAsStream("/files/Electrical.csv");
InputStream in2 = DemoCSV.class.getResourceAsStream("/files/Electrical.csv");
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
BufferedReader read = new BufferedReader(new InputStreamReader(in2));
String line, line2;
int cnt = 0;
while ((line = reader.readLine()) != null) {
String[] dataIn = line.split(",");
if (cnt == 0) {
switchNames = sNames(dataIn);
} else if (cnt != 0) {
time.add(dataIn[0]);
}
cnt++;
}
cnt = 0;
int dsize = switchNames.length;
while (datastore.size() < dsize) {
datastore.add(new ArrayList<>());
}
while ((line2 = read.readLine()) != null) {
String[] dataIn2 = line2.split(",");
if (cnt != 0) {
for (int i = 1; i <= dsize; i++) {
datastore.get(i - 1).add(dataIn2[i]);
}
}
cnt++;
}
for (String sn : switchNames) {
sections.add(new XYSeries(sn));
}
JFreeChart xylineChart = ChartFactory.createXYLineChart(
chartTitle,
"Category",
"Score",
createDataset(),
PlotOrientation.VERTICAL,
true, true, false);
ChartPanel chartPanel = new ChartPanel(xylineChart);
chartPanel.setPreferredSize(new java.awt.Dimension(1366, 768));
final XYPlot plot = xylineChart.getXYPlot();
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
plot.setRenderer(renderer);
setContentPane(chartPanel);
}
private XYDataset createDataset() {
ArrayList<Object> xystore = new ArrayList<>();
for (String sn : switchNames) {
xystore.add(new XYSeries(sn));
}
for (int i = 1; i <= switchNames.length; i++) {
for (String x : time) {
double y = Double.parseDouble(x);
((XYSeries)xystore.get(i-1)).add(y, i);
}
}
final XYSeriesCollection dataset = new XYSeriesCollection();
for (Object xy : xystore) {
dataset.addSeries((XYSeries)xy);
}
System.out.println(dataset);
return dataset;
}
public static String[] sNames(String[] names) {
String[] arr = Arrays.copyOfRange(names, 1, names.length);
return arr;
}
public static void DataClear() throws IOException, NullPointerException {
}
public static void main(String[] args) throws IOException {
DemoCSV test = new DemoCSV("Test", "second");
test.pack();
RefineryUtilities.centerFrameOnScreen(test);
test.setVisible(true);
}
}
当它运行时，它会生成如下所示的内容：
我想在 csv 文件中列中的值发生变化时更改点的颜色（不管颜色是什么，这是我们在查看时想要看到的颜色变化）。如果这是不可能的，那么为每个节点设置值的方法就足够了（具有悬停效果）。