1. Line chart demo
package com.pdf;
import java.awt.Font;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
//JFreeChart Line Chart (line chart)
public class CreateJFreeChartLine {
public static void main(String[] args) {
// Step 1: Create CategoryDataset object (prepare data)
CategoryDataset dataset = createDataset();
// Step 2: Generate JFreeChart object according to Dataset, and make corresponding settings
JFreeChart freeChart = createChart(dataset);
// Step 3: Output the JFreeChart object to a file, Servlet output stream, etc.
saveAsFile(freeChart, "c:jfreechartline.jpg", 600, 400);
}
// save as file
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);
// save as PNG
// ChartUtilities.writeChartAsPNG(out, chart, 600, 400);
// save as JPEG
ChartUtilities.writeChartAsJPEG(out, chart, 600, 400);
out.flush();
} catch (FileNotFoundException e) {
e.printStackTrace ();
} catch (IOException e) {
e.printStackTrace ();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
// do nothing
}
}
}
}
// Create a JFreeChart object based on CategoryDataset
public static JFreeChart createChart(CategoryDataset categoryDataset) {
//The "name" parameter here; I don't know what it means, but it can be used anyway
StandardChartTheme standardChartTheme = new StandardChartTheme("name");
//You can change the font of the axis
standardChartTheme.setLargeFont(new Font("楷体",Font.BOLD, 12));
// You can change the font of the legend
standardChartTheme.setRegularFont(new Font("宋体",Font.BOLD, 8));
// You can change the title font of the icon
standardChartTheme.setExtraLargeFont(new Font("隶书",Font.BOLD, 20));
ChartFactory.setChartTheme(standardChartTheme);//Set the theme
// Create a JFreeChart object: ChartFactory.createLineChart
JFreeChart jfreechart = ChartFactory.createLineChart3D("Different categories calculate line chart by hour", "Year", "Quantity", categoryDataset, PlotOrientation.VERTICAL, true, true, false);
// Use CategoryPlot to set various parameters. The following settings can be omitted.
CategoryPlot plot = (CategoryPlot) jfreechart.getPlot();
// background color transparency
plot.setBackgroundAlpha(0.5f);
// Foreground color transparency
plot.setForegroundAlpha(0.5f);
// Other settings refer to CategoryPlot class
return jfreechart;
}
/**
* Create dataset
* @return
*/
public static CategoryDataset createDataset() {
String[] rowKeys = {"Platform A","Your sister"};
String[] colKeys = {"0:00", "1:00", "2:00", "7:00", "8:00", "9:00","10:00", "11:00", "12:00", "13:00", "16:00", "20:00", "21:00","23:00" };
double[][] data = {{4, 8, 1, 1, 1, 1, 2, 2, 2, 1, 8, 2, 1, 1 },{9, 3, 5, 8, 1, 7, 2, 2, 5, 1, 8, 2, 3, 1}};
return DatasetUtilities.createCategoryDataset(rowKeys, colKeys, data);
}
}
2. Line chart custom x-axis demo
package com.pdf;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
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.RectangleInsets;
import org.jfree.ui.RefineryUtilities;
public class LineChartDemo2 extends ApplicationFrame
{
public LineChartDemo2(String paramString)
{
super(paramString);
XYDataset localXYDataset = createDataset();
JFreeChart localJFreeChart = createChart(localXYDataset);
ChartPanel localChartPanel = new ChartPanel(localJFreeChart);
localChartPanel.setPreferredSize(new Dimension(500, 270));
setContentPane(localChartPanel);
}
private static XYDataset createDataset()
{
XYSeries localXYSeries1 = new XYSeries("First");
localXYSeries1.add(1, 1);
localXYSeries1.add(2, 4);
localXYSeries1.add(3, 3);
localXYSeries1.add(4, 5);
localXYSeries1.add(5, 5);
localXYSeries1.add(6, 7);
localXYSeries1.add(7, 7);
localXYSeries1.add(21, 8);
XYSeries localXYSeries2 = new XYSeries("Second");
localXYSeries2.add(1, 5);
localXYSeries2.add(2, 7);
localXYSeries2.add(3, 6);
localXYSeries2.add(4, 8);
localXYSeries2.add(5, 4);
localXYSeries2.add(6, 4);
localXYSeries2.add(7, 2);
localXYSeries2.add(8, 1);
XYSeries localXYSeries3 = new XYSeries("Third");
localXYSeries3.add(3, 4);
localXYSeries3.add(4, 3);
localXYSeries3.add(5, 2);
localXYSeries3.add(6, 3);
localXYSeries3.add(7, 6);
localXYSeries3.add(8, 3);
localXYSeries3.add(9, 4);
localXYSeries3.add(10, 3);
XYSeriesCollection localXYSeriesCollection = new XYSeriesCollection();
localXYSeriesCollection.addSeries(localXYSeries1);
localXYSeriesCollection.addSeries(localXYSeries2);
localXYSeriesCollection.addSeries(localXYSeries3);
return localXYSeriesCollection;
}
private static JFreeChart createChart(XYDataset paramXYDataset)
{
JFreeChart localJFreeChart = ChartFactory.createXYLineChart("Line Chart Demo 2", "X", "Y", paramXYDataset, PlotOrientation.VERTICAL, true, true, false);
localJFreeChart.setBackgroundPaint(Color.white);
XYPlot localXYPlot = (XYPlot)localJFreeChart.getPlot();
localXYPlot.setBackgroundPaint(Color.lightGray);
localXYPlot.setAxisOffset(new RectangleInsets(10, 10, 10, 10));
localXYPlot.setDomainGridlinePaint(Color.white);
localXYPlot.setRangeGridlinePaint(Color.white);
XYLineAndShapeRenderer localXYLineAndShapeRenderer = (XYLineAndShapeRenderer) localXYPlot.getRenderer ();
localXYLineAndShapeRenderer.setBaseShapesVisible(true);
localXYLineAndShapeRenderer.setBaseShapesFilled(true);
NumberAxis localNumberAxis = (NumberAxis)localXYPlot.getRangeAxis();
localNumberAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
return localJFreeChart;
}
public static JPanel createDemoPanel()
{
JFreeChart localJFreeChart = createChart(createDataset());
return new ChartPanel(localJFreeChart);
}
public static void main(String[] paramArrayOfString)
{
LineChartDemo2 localLineChartDemo2 = new LineChartDemo2("Line Chart Demo 2");
localLineChartDemo2.pack();
RefineryUtilities.centerFrameOnScreen(localLineChartDemo2);
localLineChartDemo2.setVisible(true);
}
}
3. Display the Y-axis of the histogram as a demo of the percentage
package com.pdf;
import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
//JFreeChart Line Chart (bar chart)
public class CreateJFreeChartColumn {
public static void main(String[] args) {
// Step 1: Create CategoryDataset object (prepare data)
CategoryDataset dataset = createDataset();
// Step 2: Generate JFreeChart object according to Dataset, and make corresponding settings
JFreeChart freeChart = createChart(dataset);
// Step 3: Output the JFreeChart object to a file, Servlet output stream, etc.
saveAsFile(freeChart, "c:jfreechartline.jpg", 600, 400);
}
// save as file
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);
// save as PNG
// ChartUtilities.writeChartAsPNG(out, chart, 600, 400);
// save as JPEG
ChartUtilities.writeChartAsJPEG(out, chart, 600, 400);
out.flush();
} catch (FileNotFoundException e) {
e.printStackTrace ();
} catch (IOException e) {
e.printStackTrace ();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
// do nothing
}
}
}
}
// Create a JFreeChart object based on CategoryDataset
public static JFreeChart createChart(CategoryDataset categoryDataset) {
//The "name" parameter here; I don't know what it means, but it can be used anyway
StandardChartTheme standardChartTheme = new StandardChartTheme("name");
//You can change the font of the axis
standardChartTheme.setLargeFont(new Font("楷体",Font.BOLD, 12));
// You can change the font of the legend
standardChartTheme.setRegularFont(new Font("宋体",Font.BOLD, 8));
// You can change the title font of the icon
standardChartTheme.setExtraLargeFont(new Font("隶书",Font.BOLD, 20));
ChartFactory.setChartTheme(standardChartTheme);//Set the theme
// Create a JFreeChart object: ChartFactory.createLineChart
JFreeChart jfreechart = ChartFactory.createBarChart("Different categories are calculated by hourly pie chart", "year", "quantity", categoryDataset, PlotOrientation.VERTICAL, true, true, false);
// Use CategoryPlot to set various parameters. The following settings can be omitted.
CategoryPlot plot = (CategoryPlot) jfreechart.getPlot();
//Set the histogram display as a percentage
BarRenderer3D renderer = new BarRenderer3D();
renderer.setBaseOutlinePaint(Color.BLACK);
//Display the value of each bar and modify the font property of the value
renderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator("{2}",DecimalFormat.getPercentInstance()));
renderer.setItemLabelsVisible(true);
plot.setRenderer (renderer);
// background color transparency
plot.setBackgroundAlpha(0.5f);
// Foreground color transparency
plot.setForegroundAlpha(0.5f);
// Other settings refer to CategoryPlot class
return jfreechart;
}
/**
* Create dataset
* @return
*/
public static CategoryDataset createDataset() {
String[] rowKeys = {"A platform"};
String[] colKeys = {"0:00", "1:00", "2:00", "7:00", "8:00", "9:00","10:00", "11:00", "12:00", "13:00", "16:00", "20:00", "21:00","23:00" };
double[][] data = {{0.8, 0.5, 0.124, 0.58, 0.25, 0.23, 0.12, 0.47, 0.29, 0.86, 0.75, 0.64, 0.31, 0.123 }};
return DatasetUtilities.createCategoryDataset(rowKeys, colKeys, data);
}
}