【REF】JSP中生成曲线图代码

import java.awt.Color;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import javax.servlet.http.HttpSession;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.data.time.Day;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.time.TimeSeriesDataItem;
import org.jfree.ui.RectangleInsets;
import com.eward.PublicBean;
import com.excp.web.plastic.bean.DateBean;public class ChartJPGBean {
 
 PublicBean bean=new PublicBean();
 DateBean dateBean=new DateBean();
 
 private String x_label;
 private String y_label;
 private String title;
 private String format;
 private int width;
 private int height;
 
 
 
 
 
 private static TimeSeriesCollection dataset = new TimeSeriesCollection();
 /**************
  * 设置数据
  * @param arr
  */
 private TimeSeriesCollection setDataset(ArrayList arr){
   dataset.removeAllSeries();        //在javaBean中使用此类这个很重要，不然会不停的加入新的TimeSeries;
   if(arr.size()>0){
    for(int i=0;i public String getFormat() {
  return format;
 } public void setFormat(String format) {
  this.format = format;
 } public int getHeight() {
  return height;
 } public void setHeight(int height) {
  this.height = height;
 } public String getTitle() {
  return title;
 } public void setTitle(String title) {
  this.title = title;
 } public int getWidth() {
  return width;
 } public void setWidth(int width) {
  this.width = width;
 } public String getX_label() {
  return x_label;
 } public void setX_label(String x_label) {
  this.x_label = x_label;
 } public String getY_label() {
  return y_label;
 } public void setY_label(String y_label) {
  this.y_label = y_label;
 } 
}