㈠ 如何用java 画折线图

packagecom.lei.jfreechart;
importjavax.swing.JPanel;
importorg.jfree.chart.ChartFactory;
importorg.jfree.chart.ChartPanel;
importorg.jfree.chart.JFreeChart;
importorg.jfree.chart.axis.NumberAxis;
importorg.jfree.chart.plot.CategoryPlot;
importorg.jfree.chart.plot.PlotOrientation;
importorg.jfree.data.category.DefaultCategoryDataset;
importorg.jfree.ui.ApplicationFrame;
importorg.jfree.ui.RefineryUtilities;
{
/**
*
*/
=1L;
publicLineCharts(Strings){
super(s);
setContentPane(createDemoLine());
}
publicstaticvoidmain(String[]args){
LineChartsfjc=newLineCharts("折线图");
fjc.pack();
RefineryUtilities.centerFrameOnScreen(fjc);
fjc.setVisible(true);
}
//生成显示图表的面板
(){
JFreeChartjfreechart=createChart(createDataset());
returnnewChartPanel(jfreechart);
}
//生成图表主对象JFreeChart
(){
//定义图表对象
JFreeChartchart=ChartFactory.createLineChart("一季度销售曲线",//折线图名称
"时间",//横坐标名称
"销售额(百万)",//纵坐标名称
linedataset,//数据
PlotOrientation.VERTICAL,//水平显示图像
true,//includelegend
true,//tooltips
false//urls
);
CategoryPlotplot=chart.getCategoryPlot();
plot.setRangeGridlinesVisible(true);//是否显示格子线
plot.setBackgroundAlpha(0.3f);//设置背景透明度
NumberAxisrangeAxis=(NumberAxis)plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setAutoRangeIncludesZero(true);
rangeAxis.setUpperMargin(0.20);
rangeAxis.setLabelAngle(Math.PI/2.0);
returnchart;
}
//生成数据
(){
=newDefaultCategoryDataset();
//各曲线名称
Stringseries1="冰箱";
Stringseries2="彩电";
Stringseries3="洗衣机";
//横轴名称(列名称)
Stringtype1="1月";
Stringtype2="2月";
Stringtype3="3月";
linedataset.addValue(0.0,series1,type1);
linedataset.addValue(4.2,series1,type2);
linedataset.addValue(3.9,series1,type3);
linedataset.addValue(1.0,series2,type1);
linedataset.addValue(5.2,series2,type2);
linedataset.addValue(7.9,series2,type3);
linedataset.addValue(2.0,series3,type1);
linedataset.addValue(9.2,series3,type2);
linedataset.addValue(8.9,series3,type3);
returnlinedataset;
}
}

网友分享，看看是否能帮到你

㈡ Java 大数据统计 折线图

你可以试试chrome加birt。其实jvm内存是有限的，几百万个点很快就吃光你的内存了。
如果你用回birt虽然后台画的时候答慢一点，但是结果就是一个网页展示jpg图片，所以前端用户那里应该还是比较快的。

㈢ 我想用java在一个窗体中绘制多条折线图，可以实现吗

JAVA Swing使用JFreeChart实现折线图绘制你看看这个是不是你要的

㈣ JAVA绘制折线图

其实你只需要网络一回下答.
http://hi..com/javashmily/item/8f9aea3dd9070ffade222182

㈤ java 怎样样通过获得数据库中的数据画折线图能给个例子更好

折线图？JAVA做图很搓的
也很麻烦
网页的话
你可以弄个JS框架
有很多的
flash也可以实现
java你就让它调调数据啥的把

㈥ java从数据库拿去数据绘制折线图 谢谢 最好没备注

http://blog.csdn.net/pzhtpf/article/details/7600100

㈦ 已知两个坐标轴上的数值点怎么用java做一个折线图

import java.awt.Graphics;
import java.awt.Image;
import java.awt.Point;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;

public class t3 extends JFrame {
t3()
{
this.setSize(200, 200);
this.setDefaultCloseOperation(3);
this.setVisible(true);
}
public static void main(String[] args)throws Exception{
new t3();
}

Point[] p = new Point[]{new Point(1,1),new Point(11,31),new Point(31,21),new Point(99,100)};

public void paint(Graphics g)
{
Image img = (Image)new BufferedImage(200,200,BufferedImage.SCALE_DEFAULT);
Graphics gg = img.getGraphics();
for(int i=0;i<p.length-1;i++)
{
gg.drawLine(p[i].x, 200-p[i].y,p[i+1].x, 200-p[i+1].y);
}
g.drawImage(img, 0, 0, null);
}
}

㈧ java怎么生成折线图,传入月份（1,2,3）生产数量（100,200,300），然后生成一个折线图，最好是曲线图，谢

按照你的要求编写的折线图程序如下：生成的图片放在D盘根目录下，文件名是testline.png

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class LineCharts extends ApplicationFrame {
public LineCharts(String s) {
super(s);
setContentPane(createDemoLine());
}

public static void main(String[] args) {
LineCharts fjc = new LineCharts("折线图");
fjc.pack();
RefineryUtilities.centerFrameOnScreen(fjc);
fjc.setVisible(true);

}
// 生成显示图表的面板 public static JPanel createDemoLine() {
JFreeChart jfreechart = createChart(createDataset());
saveAsFile(jfreechart, "D://testline.png", 500, 300);
return new ChartPanel(jfreechart);
}

// 生成图表主对象JFreeChart public static JFreeChart createChart(DefaultCategoryDataset linedataset) {
//定义图表对象
JFreeChart chart = ChartFactory.createLineChart("LineChart", // chart title
"Time", // domain axis label
"Quantity", // range axis label
linedataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);
CategoryPlot plot = chart.getCategoryPlot();
// customise the range axis...
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setAutoRangeIncludesZero(true);
rangeAxis.setUpperMargin(1);
rangeAxis.setLabelAngle(Math.PI / 2.0);

return chart; }
//生成数据 public static DefaultCategoryDataset createDataset() {
DefaultCategoryDataset linedataset = new DefaultCategoryDataset();
// 各曲线名称
String series1 = "car";

// 横轴名称(列名称)
String type1 = "Jan";
String type2 = "Feb";
String type3 = "Mar";

linedataset.addValue(100, series1, type1); linedataset.addValue(200, series1, type2);
linedataset.addValue(300, series1, type3);

return linedataset; }
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);
// 保存为PNG文件
ChartUtilities.writeChartAsPNG(out, chart, 600, 350);
out.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
// do nothing
}
}
}
}
}

㈨ java echarts折线图

chart.showLoading({
text:'数据加载中',
effect:'spin',
maskColor:'#404a59'
});
setTimeout('chart.hideLoading()',3000);

加个进度条怎么样？