JfreeChart生成折线图并保存成图片

JfreeChart生成折线图并保存成图片
Swing中用JfreeChart画图的思路：首先用以下方法生成图片并保存在硬盘上，
然后在swing组件中调用这个图片就可以。

package com.texture;

import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.io.IOException;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
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.DefaultCategoryDataset;

public class Test3 extends JFrame{

public  Test3(String k){

super.setTitle(k);
this.setSize(600, 300);
this.setLocation(200, 300);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public static void main(String[] args){
Test3 test = new Test3("heheh");
for(int i=0;i<20;i++){
test.drow(i);
}

JPanel panel = new JPanel();

//ImageIcon img = new ImageIcon("C:\\0.png");
JLabel picturelabel = new JLabel(new ImageIcon("C:\\对比图.png"));
//picturelabel.setIcon(img);
panel.add(picturelabel);
test.add(panel);
test.show();
//test.setVisible(true);
//testtest.add();

}

public void drow(int n){

DefaultCategoryDataset dataset = new DefaultCategoryDataset();

  String series2 = "TV";
  String series3 = "Washing";

  //循环里面加入数据
  for(int i=0;i<n;i++){
  //第一个参数是拐点变化范围，第二个参数是这条折线代表什么，
  //第三个参数是横轴的刻度
// dataset.addValue(1.0+Math.random(), series1, Integer.toString(i));
  dataset.addValue(3.0+Math.random(), series2, Integer.toString(i));
  dataset.addValue(3.5, series3, Integer.toString(i));
  //dataset.addValue(4.0, series4, Integer.toString(i));

  }

BarRenderer3D renderer = new BarRenderer3D();
JFreeChart chart = null;
String title = "test drow";
//chart = ChartFactory.createBarChart3D("辅导员 "+title+" 比例统计图",title,"数量",dataset,PlotOrientation.VERTICAL,false,false,false);
chart = ChartFactory.createLineChart(
"Picture", //图表标题
"Time", //X轴标题
"Number", //Y轴标题 
dataset,  //绘图数据集 
PlotOrientation.VERTICAL, //绘制方向
true, //是否显示图例 
true,  //是否采用标准生成器
false);//是否生成超链接 
CategoryPlot plot = chart.getCategoryPlot();  //通过plot使柱上方显示具体的数据
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setAutoRangeIncludesZero(true);
rangeAxis.setUpperMargin(0.3);
rangeAxis.setLabelAngle(Math.PI );
//rangeAxis.setRange(1.5, 1.5);

try {
ChartUtilities.saveChartAsPNG(new File("C:\\对比图"+n+".png"), chart, 550, 250);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}