内容：x轴为时间轴和双y轴的散点图形和折线图线
解决问题：
1.线图上标记（时间类型数据转化为long型）；
2.双y轴；
3.图例显示；
4.曲线可随意添加；
5.鼠标指向数据点，提示数据内容；
6.Applet 嵌入JSP中
package applet;
import java.awt.Color;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.swing.JApplet;
import javax.swing.JList;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.annotations.XYPointerAnnotation;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.time.Second;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.IntervalXYDataset;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.TextAnchor;
import Util.MessageBean;
public class AstpApplet extends JApplet {
public static String StrToGB2312(String str) {
if (str == null)
str = "";
try {
str = new String(str.getBytes("ISO-8859-1"), "GB2312");
} catch (Exception ex) {
return "";
}
return str;
}
private static String selectedParaNo = null;
private static String beginDate = null;
private static String endDate = null;
private JList dwplList = null;
public void init() {
super.init();
// selectedParaNo = getParameter("SelectedParaNo");
// beginDate = getParameter("BeginDate");
// endDate = getParameter("EndDate");
selectedParaNo = "para1;para2;para3;para4;para5;para6;para7;para8;para9;para10;para11";
beginDate = "2010-05-31 07:48:55";
endDate = "2010-05-31 20:48:55";
}
public void start() {
mainApplet();
}
public void destory() {
super.destroy();
}
public void mainApplet() {
JPanel chartPanel = createDemoPanel();
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
public static JPanel createDemoPanel()
{
ArrayList dataRslt = new ArrayList();
ServletToApplet servlettoApplet = new ServletToApplet();
MessageBean messageBean = servlettoApplet.getParaNameAndNoMap(beginDate,endDate,selectedParaNo);
dataRslt = (ArrayList)messageBean.getMsg();
String[] pParaList = selectedParaNo.split(";");
JFreeChart localJFreeChart = createChart(dataRslt, pParaList);
return new ChartPanel(localJFreeChart);
}
private static JFreeChart createChart(List dwplList, String[] pParaList) {
XYDataset xydataset = createPriceDataset(dwplList,pParaList);
String s = "CHART1 TEST";
JFreeChart jfreechart = ChartFactory.createTimeSeriesChart(s, "Date",
"A", xydataset, true, true, false);
XYPlot xyplot = (XYPlot) jfreechart.getPlot();
DecimalFormat decimalformat2 = new DecimalFormat("00.00");
NumberAxis numberaxis = (NumberAxis) xyplot.getRangeAxis();
numberaxis.setNumberFormatOverride(decimalformat2);
numberaxis.setAutoRangeIncludesZero(false);
XYItemRenderer xyitemrenderer = xyplot.getRenderer();
xyitemrenderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator(
"{0}: ({1}, {2})", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"),
new DecimalFormat("0,000.00")));
StandardXYItemRenderer standardxyitemrenderer1 = new StandardXYItemRenderer();
standardxyitemrenderer1.setSeriesPaint(0, Color.blue);
standardxyitemrenderer1.setBaseShapesVisible(true);
NumberAxis numberaxis1 = new NumberAxis("T °C");
numberaxis1.setAutoRangeIncludesZero(false);
numberaxis1.setNumberFormatOverride(decimalformat2);
numberaxis1.setLabelPaint(Color.blue);
numberaxis1.setTickLabelPaint(Color.blue);
xyplot.setBackgroundPaint(new Color(205, 241, 197));
xyplot.setRangeAxis(1, numberaxis1);
xyplot.setDataset(1, createVolumeDataset(dwplList));
xyplot.setRangeAxis(1, numberaxis1);
xyplot.mapDatasetToRangeAxis(1, 1);
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
XYPointerAnnotation xypointerannotation2 = null;
String CTime = "";
double fvalue = 0.0f;
double fmaxvalue = 0.0f;
for (int i = 0; i < dwplList.size(); i++) {
fvalue =((Double) ((Map) dwplList.get(i)).get("para11")).doubleValue();
if(fmaxvalue < fvalue){
CTime = (String) ((Map) dwplList.get(i)).get("Ctime");
fmaxvalue = fvalue;
}
}
try {
xypointerannotation2 = new XYPointerAnnotation(
"T ("+ CTime + "," + fmaxvalue+")", (double)(format.parse(CTime).getTime()), fmaxvalue,
1.5707963267948966D);
xypointerannotation2.setTextAnchor(TextAnchor.BOTTOM_LEFT);
xypointerannotation2.setPaint(Color.black);
xypointerannotation2.setArrowPaint(Color.black);
xypointerannotation2.setTextAnchor(TextAnchor.TOP_CENTER);
standardxyitemrenderer1.addAnnotation(xypointerannotation2);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
standardxyitemrenderer1.setBaseToolTipGenerator(new StandardXYToolTipGenerator(
"{0}: ({1}, {2})", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"),
new DecimalFormat("00.00")));
xyplot.setRenderer(1, standardxyitemrenderer1);
return jfreechart;
}
private static XYDataset createPriceDataset(List hbaceList,String[] pParaList) {
try {
final TimeSeriesCollection dataset = new TimeSeriesCollection();
dataset.setDomainIsPointsInTime(true);
TimeSeries timeseries[] = new TimeSeries[pParaList.length];
for (int i = 0; i < pParaList.length; i++) {
timeseries[i] = new TimeSeries(ParaNoToParaName(pParaList[i]),org.jfree.data.time.Second.class);
}
for (int i = 0; i < hbaceList.size(); i++) {
String CTime = (String) ((Map) hbaceList.get(i)).get("Ctime");
String[] strs = CTime.split("[- :]");
int a = Integer.parseInt(strs[0]);
int b = Integer.parseInt(strs[1]);
int c = Integer.parseInt(strs[2]);
int d = Integer.parseInt(strs[3]);
int e = Integer.parseInt(strs[4]);
int f = Integer.parseInt(strs[5].substring(0, 2));
for (int j = 0; j < pParaList.length - 1; j++) {
timeseries[j].add(new Second(f, e, d, c, b, a), (float)((Double) ((Map) hbaceList.get(i)).get(pParaList[j]))
.doubleValue());
}
}
for (int i = 0; i < pParaList.length - 1; i++)
dataset.addSeries(timeseries[i]);
return dataset;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
private static IntervalXYDataset createVolumeDataset(List dwplList) {
try {
TimeSeries timeseries = new TimeSeries("T",
org.jfree.data.time.Second.class);
for (int i = 0; i < dwplList.size(); i++) {
String CTime = (String) ((Map) dwplList.get(i)).get("Ctime");
String[] strs = CTime.split("[- :]");
int a = Integer.parseInt(strs[0]);
int b = Integer.parseInt(strs[1]);
int c = Integer.parseInt(strs[2]);
int d = Integer.parseInt(strs[3]);
int e = Integer.parseInt(strs[4]);
int f = Integer.parseInt(strs[5].substring(0, 2));
timeseries.add(new Second(f, e, d, c, b, a), (float)((Double) ((Map) dwplList.get(i)).get("para11"))
.doubleValue());
}
return new TimeSeriesCollection(timeseries);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static String ParaNoToParaName(String pString)
{
String ParaName = "";
if(null == pString || "".equals(pString))
{
return ParaName;
}
int cmd = Integer.valueOf(pString.substring(4,pString.length()));
switch (cmd){
case 1:
ParaName = "SUN_1020 nm";
break;
case 2:
ParaName = "SUNI_1246 nm";
break;
case 3:
ParaName = "SUN_870 nm";
break;
case 4:
ParaName = "SUN_670 nm";
break;
case 5:
ParaName = "SUN_440 nm";
break;
case 6:
ParaName = "SUN_500 nm";
break;
case 7:
ParaName = "SUNI_1020 nm";
break;
case 8:
ParaName = "SUN_936 nm";
break;
case 9:
ParaName = "SUN_380 nm";
break;
case 10:
ParaName = "SUN_340 nm";
break;
case 11:
ParaName = "Temperature";
break;
}
return ParaName;
}
}