java 如何实现折线图
java 如何实现折线图
（博客来自本人csdn原创）
1：在maven中找到并导入jar 包
maven：添加链接描述
编写相应的代码（以图书馆访问者统计器实现）
package com.mycompany.libraryvisitor;/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import javax.swing.table.DefaultTableModel;
/**
*
* @author weizhijie
*/
public class VisitorForm extends javax.swing.JFrame {
/**
*创建
*/
public VisitorForm() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
tablevisitor = new javax.swing.JTable();
DisiplayButton = new javax.swing.JButton();
panelchart = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
tablevisitor.setModel(new DefaultTableModel(
new Object [][] {
{null, null},
{null, null},
{null, null},
{null, null}
},
new String [] {
"年份", "访问"
}
));
jScrollPane1.setViewportView(tablevisitor);
DisiplayButton.setText("显示统计数据");
DisiplayButton.addActionListener(new java.awt.event.ActionListener() {
@Override
public void actionPerformed(java.awt.event.ActionEvent evt) {
DisiplayButtonActionPerformed(evt);
}
});
javax.swing.GroupLayout panelchartLayout = new javax.swing.GroupLayout(panelchart);
panelchart.setLayout(panelchartLayout);
panelchartLayout.setHorizontalGroup(
panelchartLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 432, Short.MAX_VALUE)
);
panelchartLayout.setVerticalGroup(
panelchartLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 225, Short.MAX_VALUE)
);
jLabel1.setFont(new java.awt.Font("宋体", 1, 18)); // NOI18N
jLabel1.setText("图书馆访问者统计器");
jLabel2.setText("-----------------------------------------------------------------------");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(43, 43, 43)
.addComponent(panelchart, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(11, 11, 11)
.addComponent(DisiplayButton, javax.swing.GroupLayout.PREFERRED_SIZE, 180, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGroup(layout.createSequentialGroup()
.addGap(34, 34, 34)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 521, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(25, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 190, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(233, 233, 233))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 68, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 31, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 53, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(panelchart, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(36, 36, 36)
.addComponent(DisiplayButton, javax.swing.GroupLayout.PREFERRED_SIZE, 51, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 225, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(26, 26, 26))
);
pack();
}// </editor-fold>
private void DisiplayButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
//二维数组实现数据导入
Integer[][]visitordata = {{2004,1500},{2005,1450},{2006,2000},{2007,2050},{2008,2500},{2009,2000},{2010,1600},{2011,3000},{2012,3200},{2013,4000},{2014,3500},{2015,2000},{2016,2300}};
String[] title = {"年份","访问人数"};
DefaultTableModel model = new DefaultTableModel();
model.setDataVector(visitordata, title);
tablevisitor.setModel(model);
DefaultCategoryDataset chart_dataset = new DefaultCategoryDataset();
for(int i = 0; i < 12;i++)
{
chart_dataset.addValue(visitordata[i][1],"图书馆访问人员统计表?",visitordata[i][0]);
}
JFreeChart lineChart = ChartFactory.createLineChart("图书馆人员统计表","标题","人数",chart_dataset, PlotOrientation.VERTICAL,true,true,false);
ChartPanel chartpanel = new ChartPanel(lineChart);
chartpanel.setSize(panelchart.getSize());
panelchart.removeAll();
panelchart.add(chartpanel);
panelchart.validate();
}
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(VisitorForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(VisitorForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(VisitorForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(VisitorForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new VisitorForm().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton DisiplayButton;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JPanel panelchart;
private javax.swing.JTable tablevisitor;
// End of variables declaration
}
运行结果
xiaozhounandu
