用JAVA怎么将SQL SERVER 数据库里面的数据用曲线表示出来,类似于在X、Y坐标中,并显示在网页中? [Java][J2SE / 扩展类] 用JAVA怎么将SQL SERVER 数据库里面的数据用曲线表示出来,类似于在X、Y坐标中,并显示在网页中? [Java][J2SE / 扩展类] 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 一楼说的对jfreechart,一个不错的选择 jfreechart例子:http://download.csdn.net/source/795475 使用jfreechart来做吧,有个折线图的实例,你看看// Decompiled by Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov.// Jad home page: http://www.kpdus.com/jad.html// Decompiler options: packimports(3) fieldsfirst ansi package demo;import java.awt.Dimension;import java.text.DecimalFormat;import javax.swing.JPanel;import org.jfree.chart.*;import org.jfree.chart.axis.DateAxis;import org.jfree.chart.plot.XYPlot;import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;import org.jfree.chart.util.RelativeDateFormat;import org.jfree.data.time.*;import org.jfree.data.xy.XYDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities;public class RelativeDateFormatDemo1 extends ApplicationFrame{ public RelativeDateFormatDemo1(String s) { super(s); JPanel jpanel = createDemoPanel(); jpanel.setPreferredSize(new Dimension(500, 270)); setContentPane(jpanel); } private static JFreeChart createChart(XYDataset xydataset) { JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("Exercise Chart", "Elapsed Time", "Beats Per Minute", xydataset, true, true, false); XYPlot xyplot = (XYPlot)jfreechart.getPlot(); xyplot.setDomainCrosshairVisible(true); xyplot.setRangeCrosshairVisible(true); org.jfree.chart.renderer.xy.XYItemRenderer xyitemrenderer = xyplot.getRenderer(); if(xyitemrenderer instanceof XYLineAndShapeRenderer) { XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)xyitemrenderer; xylineandshaperenderer.setBaseShapesVisible(true); xylineandshaperenderer.setBaseShapesFilled(true); } DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis(); Minute minute = new Minute(0, 9, 1, 10, 2006); RelativeDateFormat relativedateformat = new RelativeDateFormat(minute.getFirstMillisecond()); relativedateformat.setSecondFormatter(new DecimalFormat("00")); dateaxis.setDateFormatOverride(relativedateformat); ChartUtilities.applyCurrentTheme(jfreechart); return jfreechart; } private static XYDataset createDataset() { TimeSeries timeseries = new TimeSeries("Heart Rate", org.jfree.data.time.Second.class); timeseries.add(new Second(45, 6, 9, 1, 10, 2006), 143D); timeseries.add(new Second(33, 8, 9, 1, 10, 2006), 167D); timeseries.add(new Second(10, 10, 9, 1, 10, 2006), 189D); timeseries.add(new Second(19, 12, 9, 1, 10, 2006), 156D); timeseries.add(new Second(5, 15, 9, 1, 10, 2006), 176D); timeseries.add(new Second(12, 16, 9, 1, 10, 2006), 183D); timeseries.add(new Second(6, 18, 9, 1, 10, 2006), 138D); timeseries.add(new Second(11, 20, 9, 1, 10, 2006), 102D); TimeSeriesCollection timeseriescollection = new TimeSeriesCollection(); timeseriescollection.addSeries(timeseries); return timeseriescollection; } public static JPanel createDemoPanel() { JFreeChart jfreechart = createChart(createDataset()); return new ChartPanel(jfreechart); } public static void main(String args[]) { RelativeDateFormatDemo1 relativedateformatdemo1 = new RelativeDateFormatDemo1("JFreeChart: RelativeDateFormatDemo1.java"); relativedateformatdemo1.pack(); RefineryUtilities.centerFrameOnScreen(relativedateformatdemo1); relativedateformatdemo1.setVisible(true); }} jfreechat ..自己研究下 。去网上找代码N多 。。 关于 htmlparser Parser 的编码问题 php打不开了 问个jstl的东东 这个javascript怎么在本页一加载的时候就执行啊 讨论什么时候使用自定义标签? 请问在jsp 中如何调用 javascript 函数? 关于textarea,跪求大家帮忙 jsp+mysql中文问题(freebsd+resin+jdk环境) 弱弱的问:文件的后缀jar、class、java各表示什么文件? 谁能讲一讲weblogic 6.0下bmp、cmp具体的发部过程?? struts2 标签问题!在线等.... 在myeclipse里修改java代码重启Tomcat
jfreechart,一个不错的选择
// Decompiled by Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi package demo;import java.awt.Dimension;
import java.text.DecimalFormat;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.util.RelativeDateFormat;
import org.jfree.data.time.*;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;public class RelativeDateFormatDemo1 extends ApplicationFrame
{ public RelativeDateFormatDemo1(String s)
{
super(s);
JPanel jpanel = createDemoPanel();
jpanel.setPreferredSize(new Dimension(500, 270));
setContentPane(jpanel);
} private static JFreeChart createChart(XYDataset xydataset)
{
JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("Exercise Chart", "Elapsed Time", "Beats Per Minute", xydataset, true, true, false);
XYPlot xyplot = (XYPlot)jfreechart.getPlot();
xyplot.setDomainCrosshairVisible(true);
xyplot.setRangeCrosshairVisible(true);
org.jfree.chart.renderer.xy.XYItemRenderer xyitemrenderer = xyplot.getRenderer();
if(xyitemrenderer instanceof XYLineAndShapeRenderer)
{
XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)xyitemrenderer;
xylineandshaperenderer.setBaseShapesVisible(true);
xylineandshaperenderer.setBaseShapesFilled(true);
}
DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis();
Minute minute = new Minute(0, 9, 1, 10, 2006);
RelativeDateFormat relativedateformat = new RelativeDateFormat(minute.getFirstMillisecond());
relativedateformat.setSecondFormatter(new DecimalFormat("00"));
dateaxis.setDateFormatOverride(relativedateformat);
ChartUtilities.applyCurrentTheme(jfreechart);
return jfreechart;
} private static XYDataset createDataset()
{
TimeSeries timeseries = new TimeSeries("Heart Rate", org.jfree.data.time.Second.class);
timeseries.add(new Second(45, 6, 9, 1, 10, 2006), 143D);
timeseries.add(new Second(33, 8, 9, 1, 10, 2006), 167D);
timeseries.add(new Second(10, 10, 9, 1, 10, 2006), 189D);
timeseries.add(new Second(19, 12, 9, 1, 10, 2006), 156D);
timeseries.add(new Second(5, 15, 9, 1, 10, 2006), 176D);
timeseries.add(new Second(12, 16, 9, 1, 10, 2006), 183D);
timeseries.add(new Second(6, 18, 9, 1, 10, 2006), 138D);
timeseries.add(new Second(11, 20, 9, 1, 10, 2006), 102D);
TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
timeseriescollection.addSeries(timeseries);
return timeseriescollection;
} public static JPanel createDemoPanel()
{
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
} public static void main(String args[])
{
RelativeDateFormatDemo1 relativedateformatdemo1 = new RelativeDateFormatDemo1("JFreeChart: RelativeDateFormatDemo1.java");
relativedateformatdemo1.pack();
RefineryUtilities.centerFrameOnScreen(relativedateformatdemo1);
relativedateformatdemo1.setVisible(true);
}
}