xyseries_jsp.java

基于jfreechart组件的矢量图绘制

package org.apache.jsp;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.awt.*;
import java.awt.geom.Ellipse2D;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Locale;
import java.text.NumberFormat;
import javax.servlet.http.HttpSession;
import org.jfree.data.*;
import org.jfree.chart.*;
import org.jfree.chart.axis.*;
import org.jfree.chart.renderer.BarRenderer;
import org.jfree.chart.renderer.StandardXYItemRenderer;
import org.jfree.chart.plot.*;
import org.jfree.chart.entity.*;
import org.jfree.chart.labels.*;
import org.jfree.chart.urls.*;
import org.jfree.chart.servlet.*;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Iterator;
import org.jfree.data.time.*;
import java.awt.Font;

public final class XYSeries_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

  private static java.util.Vector _jspx_dependants;

  public java.util.List getDependants() {
    return _jspx_dependants;
  }

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;


    try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html;charset=GBK");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      			null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\n");
      out.write("\n");
      out.write("\n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write("\n");
      out.write("\n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
      out.write(" \n");
 request.setCharacterEncoding("gb2312");
      out.write('\n');
 
XYSeries dataSeries = new XYSeries("增长");      

for (int i = 0; i <= 10; i++) 
{ 
int x=(int) (100*Math.random()); 
int y=(int) (100*Math.random()); 
dataSeries.add(x,y); 
} 



XYSeries dataSeries1 = new XYSeries("趋势");      

for (int j = 0; j <= 100; j++) 
{ 
int x=(int) (100*Math.random()); 
int y=(int) (100*Math.random()); 
dataSeries1.add(j,40); 
} 


XYSeriesCollection xyDataset = new XYSeriesCollection(); 

xyDataset.addSeries(dataSeries); 
xyDataset.addSeries(dataSeries1); 


String filename = ""; 
SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy", Locale.UK); 
StandardXYToolTipGenerator ttg = new StandardXYToolTipGenerator(); 

TimeSeriesURLGenerator urlg = new TimeSeriesURLGenerator(sdf, "pie_chart.jsp", "series", "hitDate"); 
//  Create the chart object 

ValueAxis xAxis = new NumberAxis("X轴坐标"); 
//x轴坐标 
ValueAxis yAxis = new NumberAxis("Y轴坐标"); 
//y轴坐标 
StandardXYItemRenderer renderer = new StandardXYItemRenderer(StandardXYItemRenderer.LINES ,ttg, urlg); 
renderer.setShapesFilled(true); 
             
Font font=new Font("黑体",Font.TRUETYPE_FONT, 12); 
XYPlot plot = new XYPlot(xyDataset, xAxis, yAxis, renderer); 
JFreeChart chart = new JFreeChart("测试曲线图", font, plot, true); 
chart.setBackgroundPaint(java.awt.Color.white);             

//  Write the chart image to the temporary directory 
ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); 
filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);     
String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
      out.write(" \n");
      out.write("<!DOCTYPE HTML PUBLIC \"-//w3c//dtd html 4.0 transitional//en\">\n");
      out.write("\n");
      out.write("<html>\n");
      out.write("<head>\n");
      out.write("<title>曲线图</title>\n");
      out.write("</head>\n");
      out.write("<body bgcolor=\"#FFFFFF\">\n");
      out.write("<center>\n");
      out.write(" <P ALIGN=\"CENTER\">\n");
      out.write("  <img src=\"");
      out.print( graphURL );
      out.write("\" width=500 height=300 border=0 usemap=\"#");
      out.print( filename );
      out.write("\"> \n");
      out.write(" </P>\n");
      out.write(" <a href=\"main.jsp\">返回主页面</a>\n");
      out.write(" <a href=\"inXY.jsp\">重新输入</a>\n");
      out.write(" \n");
      out.write(" \n");
      out.write("</center>\n");
      out.write("</body>\n");
      out.write("</html>");
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}