struts2 spring jfreechart 整合

jfreechart和servlet結合使用很簡單，只要把圖片生成了就能經過servlet顯示到畫面上去，jfreechart和struts2的結合使用其實看上去也很簡單，網上大部分方法都是用<img src="*.action">的方法來調用並顯示到畫面上的，可是這中方法只能顯示圖片的頁面，不能顯示jsp原畫面，因此這種方法並不適合經過按鈕來控制圖片的變化的jsp頁面調用jfreechart生成的圖片,爲啥經過按鈕點擊來顯示圖片到原畫面而不是隻有圖片的頁面呢？由於struts2 的返回值         <action name="tbc03Action" class="com.nec.jp.railroadX.tzz.tbc03.Tbc03Action">
           <result  type="chart">
     <param name="width">${width}</param>
        <param name="height">${height}</param>
   </result>
         </action>

這種方式返回的就是一張圖片，就算你在<result  type="chart">  </result>中間加一個返回到頁面上的jsp它返回的仍是一張圖片不是一個jsp頁面的圖片，如今咱們能夠經過servlet和struts2的結合來顯示這張圖片到畫面上去，可是struts2的攔截器會主動攔截servlet的請求，因此還得對struts2 的攔截作些處理，就是在result的時候先返回到頁面在經過servlet請求訪問這張圖片的地址，可是要在result的後面加一句 <interceptor-ref name="defaultStack"/>默認攔截器 ，
<action name="show" method="show" class="LoginAction"> 
      <result>index.jsp</result> 
      <interceptor-ref name="defaultStack"/> 
 </action>

必須在web.xml中加上servlet的配置：

 <filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
 </filter>
 <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
<servlet>     
    <servlet-name>DisplayChart</servlet-name>     
    <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>     
</servlet>     
<servlet-mapping>     
    <servlet-name>DisplayChart</servlet-name>     
    <url-pattern>/servletDisplayChart</url-pattern>     
</servlet-mapping>

最後是jsp：

添加<img src="<%=request.getContextPath() %>/servletDisplayChart?filename=<s:property value='hy_filename'/>" border="0">   就能夠經過點按鈕來控制圖片的顯示了

 

其中java代碼:

import java.awt.Rectangle;
import java.awt.Shape;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.entity.ChartEntity;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.data.category.DefaultCategoryDataset;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{    
    //頁面鼠標事件時須要的參數    
    private String hy_filename;    
    /**   
     * 顯示圖片   
     * @return   
     */   
    public String show(){    
        HttpServletRequest req = ServletActionContext.getRequest();    
        HttpServletResponse res = ServletActionContext.getResponse();    
        hy_filename = createChartImage(req, res);    
        return SUCCESS;    
    }    
        
    private String createChartImage(HttpServletRequest req, HttpServletResponse res){    
        JFreeChart chart = createChart(createData());    
        String filename = createUseMap(chart, 510, 300, req, res);    
        return filename;    
    }    
        
    private JFreeChart createChart(DefaultCategoryDataset defaultcategorydataset){    
        JFreeChart chart = ChartFactory.createLineChart(null, //圖形標題名稱    
        null,                       //domain軸 Lable,橫座標Lable    
        null,                       //range 軸 Lable,縱座標Lable    
        defaultcategorydataset,     // dataset    
        PlotOrientation.VERTICAL,   //垂直顯示    
        true,                       // legend?    
        true,                       // tooltips?    
        false);                     //URLs?    
        return chart;    
    }    
        
    private String createUseMap(JFreeChart chart, int width, int height, HttpServletRequest req, HttpServletResponse res){    
        //在矩形框中顯示信息    
        Shape shape = new Rectangle(20, 10);    
        ChartEntity entity = new ChartEntity(shape);    
        StandardEntityCollection coll = new StandardEntityCollection();    
        coll.add(entity);    
        //該工具類上面沒有介紹，在鼠標移動到圖片時顯示提示信息是用Map實現的，這些Map是用該類生成的。    
        ChartRenderingInfo info = new ChartRenderingInfo(coll);    
        PrintWriter pw;    
        String filename = null;    
        try {    
            res.setContentType("text/html;charset=utf-8");    
            res.setCharacterEncoding("utf-8");    
            pw = res.getWriter();//輸出MAP信息     
            //寫入到輸出流生成圖像文件，同時把圖片的具體信息放入ChartRenderingInfo的一個實例爲之後生成Map提供信息     
            //ChartUtilities.writeChartAsPNG(out, chart, width, height, info);    
            filename = ServletUtilities.saveChartAsPNG(chart, width , height, info, req.getSession());//保存圖表爲文件    
            //讀取info對象，生成Map信息。這些信息寫在pw的輸出流中，這裏的輸出流就是Response.out，也就是直接輸出到頁面了    
            ChartUtilities.writeImageMap(pw, filename, info, false);    
            pw.flush();    
   
        } catch (IOException e) {    
            e.printStackTrace();    
        }    
        return filename;    
    }    
        
    private DefaultCategoryDataset createData(){    
        String series1 = "血糖";    
        String series2 = "舒張壓";    
        String series3 = "收縮壓";    
        String type1 = "2009-01-01";    
        String type2 = "2009-02-01";    
        String type3 = "2009-03-01";    
        String type4 = "2009-04-01";    
        String type5 = "2009-05-01";    
        String type6 = "2009-06-01";    
        String type7 = "2009-07-01";    
        String type8 = "2009-08-01";    
        DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();    
        defaultcategorydataset.addValue(1.0D, series1, type1);    
        defaultcategorydataset.addValue(2D, series1, type2);    
        defaultcategorydataset.addValue(3D, series1, type3);    
        defaultcategorydataset.addValue(5D, series1, type4);    
        defaultcategorydataset.addValue(5D, series1, type5);    
        defaultcategorydataset.addValue(7D, series1, type6);    
        defaultcategorydataset.addValue(7D, series1, type7);    
        defaultcategorydataset.addValue(8D, series1, type8);    
   
        defaultcategorydataset.addValue(5D, series2, type1);    
        defaultcategorydataset.addValue(7D, series2, type2);    
        defaultcategorydataset.addValue(6D, series2, type3);    
        defaultcategorydataset.addValue(8D, series2, type4);    
        defaultcategorydataset.addValue(4D, series2, type5);    
        defaultcategorydataset.addValue(4D, series2, type6);    
        defaultcategorydataset.addValue(2D, series2, type7);    
        defaultcategorydataset.addValue(1.0D, series2, type8);    
        return defaultcategorydataset;    
    }    
   
    public String getHy_filename() {    
        return hy_filename;    
    }    
   
    public void setHy_filename(String hy_filename) {    
        this.hy_filename = hy_filename;    
    }    
}  

struts.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
 "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 "http://struts.apache.org/dtds/struts-2.0.dtd">
  
<struts>
     <package name="jfreeChart" extends="struts-default" >
    <action name="show" method="show" class="LoginAction"> 
      <result>index.jsp</result> 
      <interceptor-ref name="defaultStack"/> 
 </action>

  </package>
  
</struts>

 

如今在加上spring的東西的話上面的方法也是無論用的，也不能顯示圖片，由於struts2和spring的攔截器會將servlet攔截掉，因此下面的方法把servlet去掉。

這個問題我糾結了好久才找到方法來解決，其實jfreechart的ServletUtilities提供了圖片的生成保存的方法saveChartAsPNG，他會臨時的保存默認保存路徑是保存在tomcat的temp文件下面，因此能夠把它的路徑改下，取到這個圖片，經過流 的方式輸出到頁面上去，就能實現點按鈕來控制圖片的顯示了。

把生成好的圖片自定義一個jsp：

img。jsp

<%@ page language="java" contentType="text/html; charset=windows-31j"
    pageEncoding="windows-31j"%>
<%@ page import="java.io.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-31j">
<title>Insert title here</title>
</head>
<body>

<div style="margin-left: 0px;">
<%
 response.setContentType("image/PENG");
 OutputStream outt = response.getOutputStream();
 String path = (String)application.getAttribute("hy_filename");
 File file = new File(path);
 FileInputStream fis = new FileInputStream(file);
 byte[] b = new byte[1024];
 int len = -1;
 while ((len = fis.read(b, 0, 1024)) != -1) {
  outt.write(b, 0, len);
 }
 outt.flush();
 outt.close();

 out.clear();
 out = pageContext.pushBody();
%>
</div>
</body>
</html>

而後在原來的頁面把<img src="img.jsp">調用

具體的java代碼:

package com.nec.jp.railroadX.tzz.tbc03;

import java.awt.Color;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.struts2.ServletActionContext;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickUnit;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.renderer.xy.XYStepRenderer;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.data.time.Second;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;

import com.opensymphony.xwork2.ActionSupport;

/**
 * create image
 * @see createDateSet
 * @see getLineXYChart
 */
@SuppressWarnings("serial")
public class Tbc03Action extends ActionSupport{
 private String startTime="22:00:00";
 private String time="10:00:00";
 private String kikann="5";
  private JFreeChart chart;
  private int width;
 private String hy_filename; 
  private int height;
 /**
  * @return the startTime
  */
 public String getStartTime() {
  return startTime;
 }

 /**
  * @param startTime the startTime to set
  */
 public void setStartTime(String startTime) {
  this.startTime = startTime;
 }

 /**
  * @return the kikann
  */
 public String getKikann() {
  return kikann;
 }

 /**
  * @param kikann the kikann to set
  */
 public void setKikann(String kikann) {
  this.kikann = kikann;
 }
 
 /**
  * @return the width
  */
 public int getWidth() {
  return width;
 }

 /**
  * @param width the width to set
  */
 public void setWidth(int width) {
  this.width = width;
 }

 /**
  * @return the height
  */
 public int getHeight() {
  return height;
 }

 /**
  * @param height the height to set
  */
 public void setHeight(int height) {
  this.height = height;
 }

 public JFreeChart getChart() {
  return chart;
 }

 public void setChart(JFreeChart chart) {
  this.chart = chart;
 }

 public String getTime() {
  return time;
 }

 public void setTime(String time) {
  this.time = time;
 }

 public String getHy_filename() {
  return hy_filename;
 }

 public void setHy_filename(String hyFilename) {
  hy_filename = hyFilename;
 }

 public String execute(){
    if (kikann!=null) {
   if (Integer.parseInt(this.getKikann()) == 5) {
     width = 600;
     height = 300;
     try {
      chart = getLineXYChart(0,this.getStartTime(),this.getKikann(),this.time);
     } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     } catch (ParseException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     }
  
   } else if (Integer.parseInt(this.getKikann()) > 5) {
    try {
     width = (int) (Float.parseFloat(this.getKikann())*60/0.5);
     height = 300;
     chart = getLineXYChart(1,this.getStartTime(),this.getKikann(),this.time);
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (ParseException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   } else if (Integer.parseInt(this.getKikann()) < 5 && Integer.parseInt(this.getKikann()) > 0) {
    try {
     width = (int) (Float.parseFloat(this.getKikann())*60/0.5);
     height = 300;
     chart = getLineXYChart(2,this.getStartTime(),this.getKikann(),this.time);
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (ParseException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
    }
    ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
    try {
  hy_filename = Utilities.saveChartAsPNG(chart, width, height, info, ServletActionContext.getRequest().getSession());
 } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 ServletActionContext.getServletContext().setAttribute("hy_filename", hy_filename);
 //hy_filename = hy_filename.substring(hy_filename.indexOf("/"));
// File file = new File(hy_filename);
// try {
//  ChartUtilities.saveChartAsPNG(file, chart, width, height);
// } catch (IOException e1) {
//  // TODO Auto-generated catch block
//  e1.printStackTrace();
// }
// try {
//  ServletUtilities.sendTempFile(file, ServletActionContext.getResponse(),"peng");
// } catch (IOException e1) {
//  // TODO Auto-generated catch block
//  e1.printStackTrace();
// }
// try {
//  ServletUtilities.sendTempFile(file,ServletActionContext.getResponse(),"peng");
// } catch (IOException e1) {
//  // TODO Auto-generated catch block
//  e1.printStackTrace();
// }

// String strimg = ChartUtilities.getImageMap(hy_filename, info);  
// ServletActionContext.getRequest().setAttribute("strimg", strimg);
// 
//    String path = ServletActionContext.getRequest().getContextPath();
//    String basePath = ServletActionContext.getRequest().getScheme() + "://"
//            + ServletActionContext.getRequest().getServerName() + ":" + ServletActionContext.getRequest().getServerPort()+ path + "/";
//            
// String chartViewer = basePath + "tbc03Action.action"; 
// ServletActionContext.getRequest().setAttribute("chartViewer", chartViewer);
   return SUCCESS;
 }
 
  
 /**
     * create image
     * @param x date, y value
     * @return image name and image url
     */
 private XYDataset createDateSet()
    {
     TimeSeriesCollection dataset = new TimeSeriesCollection();
     // AFO Line is generate
     TimeSeries s1 = new TimeSeries("line1", org.jfree.data.time.Second.class); 
     TimeSeries s2 = new TimeSeries("line2", org.jfree.data.time.Second.class);
     TimeSeries s3 = new TimeSeries("line3", org.jfree.data.time.Second.class);
     TimeSeries s4 = new TimeSeries("line4", org.jfree.data.time.Second.class);
     TimeSeries s5 = new TimeSeries("line5", org.jfree.data.time.Second.class);
     TimeSeries s6 = new TimeSeries("line6", org.jfree.data.time.Second.class);
//     TimeSeries s7 = new TimeSeries("line7", org.jfree.data.time.Second.class);
//     TimeSeries s8 = new TimeSeries("line8", org.jfree.data.time.Second.class);
//     TimeSeries s9 = new TimeSeries("line9", org.jfree.data.time.Second.class);
//     TimeSeries s10 = new TimeSeries("line10", org.jfree.data.time.Second.class);
     s1.add(new Second(00, 00, 22, 01, 01, 1970), 1);
     s1.add(new Second(00, 01, 22, 01, 01, 1970), 1);
     s1.add(new Second(20, 01, 22, 01, 01, 1970), 1.8);
     s1.add(new Second(15, 01, 22, 01, 01, 1970), 1.8);
     s1.add(new Second(45, 02, 22, 01, 01, 1970), 1);
     s1.add(new Second(15, 02, 22, 01, 01, 1970), 1);
     s1.add(new Second(45, 03, 22, 01, 01, 1970), 1.8);
     s1.add(new Second(15, 03, 22, 01, 01, 1970), 1.8);
     s1.add(new Second(15, 04, 22, 01, 01, 1970), 1);
     s1.add(new Second(45, 04, 22, 01, 01, 1970), 1);
     dataset.addSeries(s1);
     s2.add(new Second(00, 00, 22, 01, 01, 1970), 2);
     s2.add(new Second(00, 01, 22, 01, 01, 1970), 2);
     s2.add(new Second(20, 01, 22, 1, 01, 1970), 2.8);
     s2.add(new Second(15, 01, 22, 01, 01, 1970), 2.8);
     s2.add(new Second(45, 02, 22, 01, 01, 1970), 2);
     s2.add(new Second(15, 02, 22, 01, 01, 1970), 2);
     s2.add(new Second(45, 03, 22, 01, 01, 1970), 2.8);
     s2.add(new Second(15, 03, 22, 01, 01, 1970), 2.8);
     s2.add(new Second(15, 04, 22, 01, 01, 1970), 2);
     s2.add(new Second(45, 04, 22, 01, 01, 1970), 2);
     dataset.addSeries(s2);
     s3.add(new Second(00, 00, 22, 01, 01, 1970), 3);
     s3.add(new Second(00, 01, 22, 01, 01, 1970), 3);
     s3.add(new Second(20, 01, 22, 1, 01, 1970), 3.8);
     s3.add(new Second(15, 01, 22, 01, 01, 1970), 3.8);
     s3.add(new Second(45, 02, 22, 01, 01, 1970), 3);
     s3.add(new Second(15, 02, 22, 01, 01, 1970), 3);
     s3.add(new Second(45, 03, 22, 01, 01, 1970), 3.8);
     s3.add(new Second(15, 03, 22, 01, 01, 1970), 3.8);
     s3.add(new Second(15, 04, 22, 01, 01, 1970), 3);
     s3.add(new Second(45, 04, 22, 01, 01, 1970), 3);
     dataset.addSeries(s3);
     s4.add(new Second(00, 00, 22, 01, 01, 1970), 4);
     s4.add(new Second(00, 01, 22, 01, 01, 1970), 4);
     s4.add(new Second(20, 01, 22, 1, 01, 1970), 4.8);
     s4.add(new Second(15, 01, 22, 01, 01, 1970), 4.8);
     s4.add(new Second(45, 02, 22, 01, 01, 1970), 4);
     s4.add(new Second(15, 02, 22, 01, 01, 1970), 4);
     s4.add(new Second(45, 03, 22, 01, 01, 1970), 4.8);
     s4.add(new Second(15, 03, 22, 01, 01, 1970), 4.8);
     s4.add(new Second(15, 04, 22, 01, 01, 1970), 4);
     s4.add(new Second(45, 04, 22, 01, 01, 1970), 4);
     dataset.addSeries(s4);
     s5.add(new Second(00, 00, 22, 01, 01, 1970), 5);
     s5.add(new Second(00, 01, 22, 01, 01, 1970), 5);
     s5.add(new Second(20, 01, 22, 1, 01, 1970), 5.8);
     s5.add(new Second(15, 01, 22, 01, 01, 1970), 5.8);
     s5.add(new Second(45, 02, 22, 01, 01, 1970), 5);
     s5.add(new Second(15, 02, 22, 01, 01, 1970), 5);
     s5.add(new Second(45, 03, 22, 01, 01, 1970), 5.8);
     s5.add(new Second(15, 03, 22, 01, 01, 1970), 5.8);
     s5.add(new Second(15, 04, 22, 01, 01, 1970), 5);
     s5.add(new Second(45, 04, 22, 01, 01, 1970), 5);
     dataset.addSeries(s5);
     s6.add(new Second(00, 00, 22, 01, 01, 1970), 6);
     s6.add(new Second(00, 01, 22, 01, 01, 1970), 6);
     s6.add(new Second(20, 01, 22, 1, 01, 1970), 6.8);
     s6.add(new Second(15, 01, 22, 01, 01, 1970), 6.8);
     s6.add(new Second(45, 02, 22, 01, 01, 1970), 6);
     s6.add(new Second(15, 02, 22, 01, 01, 1970), 6);
     s6.add(new Second(45, 03, 22, 01, 01, 1970), 6.8);
     s6.add(new Second(15, 03, 22, 01, 01, 1970), 6.8);
     s6.add(new Second(15, 04, 22, 01, 01, 1970), 6);
     s6.add(new Second(45, 04, 22, 01, 01, 1970), 6);
     dataset.addSeries(s6);
     dataset.setDomainIsPointsInTime(true);
     return dataset;
    }

    /**
     * produce  pic
     * 
     * @param session
     *          image save in session
     * @param pw
     *         write image url
     * @param s
     *          image is big or small
     * @exception IOException
     *    dateTime I/O exception  
     * @throws ParseException 
     */
    public JFreeChart getLineXYChart(int s,String starttime,String kikan,String nyr) throws IOException, ParseException 
    {
     XYDataset dataset = this.createDateSet();
     // draw jFreeChart page
      chart = ChartFactory.createTimeSeriesChart(" ", " ", " ", dataset, false, false, false);
     // x ,y draw style
     XYPlot xyplot = (XYPlot)chart.getPlot();
     xyplot.setBackgroundPaint(Color.black);
     xyplot.setDomainGridlinePaint(Color.black);
     xyplot.setRangeGridlinePaint(Color.white);
     xyplot.setDomainMinorGridlinePaint(Color.white);
     xyplot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
     XYStepRenderer xysteprenderer = new XYStepRenderer();
     xysteprenderer.setBaseShapesVisible(true);
     xysteprenderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
     xysteprenderer.setDefaultEntityRadius(2);
     xyplot.setRenderer(xysteprenderer);
     //*
     DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis();
      
    
     // time(x) axis
     //DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis();
     SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss");
        dateaxis.setDateFormatOverride(format);
       // dateaxis.setVerticalTickLabels(true);
        
    
 
  Date end_time;
  String endtime;
  int sec;
  int min;
  sec = Integer.parseInt(starttime.substring(6,8))+1;
  min = Integer.parseInt(kikan)+Integer.parseInt(starttime.substring(3,5));
  System.out.print(sec);
  if (sec < 0) {
   sec = 00;
  } 
  String secend = null;
  if (sec < 10) {
   secend = "0"+sec;
  }
  String minute = "";
  if (min <10) {
   minute = "0" +  String.valueOf(min);
  } else {
   minute = String.valueOf(min);
  }
  endtime = starttime.substring(0,2)+":"+ minute +":"+ secend;
  end_time = format.parse(endtime);
  int starttime_sec = Integer.parseInt(starttime.substring(6, 8))+1;
  System.out.print(end_time.getDate());
  String starttime_secend = "";
  if (starttime_sec < 10) {
   starttime_secend = "0" + String.valueOf(starttime_sec);
  }
  starttime = starttime.substring(0, 6) + starttime_secend;
  starttime = starttime;
   Date startDate =  format.parse(starttime);
  dateaxis.setRange(startDate, end_time);
  dateaxis.setVisible(true);
  
     XYItemRenderer r = xyplot.getRenderer();
     if (r instanceof XYLineAndShapeRenderer) 
     { 
      XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) r;
      // line color
      renderer.setSeriesPaint(0, Color.GREEN);
      renderer.setSeriesPaint(1, Color.green);
      renderer.setSeriesPaint(2, Color.green);
      renderer.setSeriesPaint(3, Color.GREEN);
      renderer.setSeriesPaint(4, Color.green);
      renderer.setSeriesPaint(5, Color.green);
      renderer.setSeriesPaint(6, Color.GREEN);
      renderer.setSeriesPaint(7, Color.green);
      renderer.setSeriesPaint(8, Color.green);
      renderer.setSeriesPaint(9, Color.GREEN);
      renderer.setSeriesPaint(10, Color.GREEN);
  }
   
        // dispose dateTime I/O exception
      if (s == 1) {
       // big
       dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.SECOND, 60, format));
      } else if (s == 0) {
       // normal
       dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.SECOND, (int) (Float.parseFloat(kikan)*60/0.5/20), format));
      } else if (s == 2) { 
       // small
       dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.SECOND, 30, format));
      }
     return chart;
    }

}

 Utilities.java//修改了jfreechart的生成臨時圖片的路徑

    public static String saveChartAsPNG(JFreeChart chart, int width, int height,
            ChartRenderingInfo info, HttpSession session) throws IOException {

        if (chart == null) {
            throw new IllegalArgumentException("Null 'chart' argument.");
        }
        Utilities.createTempDir();
        String prefix = Utilities.tempFilePrefix;
        if (session == null) {
            prefix = Utilities.tempOneTimeFilePrefix;
        }
    
       System.out.print(ServletActionContext.getServletContext().getRealPath(ServletActionContext.getRequest().getRequestURI()));
     String path = ServletActionContext.getRequest().getRealPath("/") + "TBC03";
      String path1 = ServletActionContext.getRequest().getContextPath();
     String basePath = ServletActionContext.getRequest().getScheme() + "://"
       + ServletActionContext.getRequest().getServerName() + ":" + ServletActionContext.getRequest().getServerPort()
       + path1 + "/";
        File tempFile = File.createTempFile(prefix, ".png",
                new File(path));
   
        ChartUtilities.saveChartAsPNG(tempFile, chart, width, height, info);
        if (session != null) {
            Utilities.registerChartForDeletion(tempFile, session);
        }
        return path+"/"+tempFile.getName();

    }

    protected static void registerChartForDeletion(File tempFile,
            HttpSession session) {

        //  Add chart to deletion list in session
        if (session != null) {
            ChartDeleter chartDeleter
                = (ChartDeleter) session.getAttribute("JFreeChart_Deleter");
            if (chartDeleter == null) {
                chartDeleter = new ChartDeleter();
                session.setAttribute("JFreeChart_Deleter", chartDeleter);
            }
            chartDeleter.addChart(tempFile.getName());
        }
        else {
            System.out.println("Session is null - chart will not be deleted");
        }
    }
ChartResult.java //重新定義了返回圖片的width和height的屬性不然出錯。

package com.nec.jp.railroadX.tzz.tbc03;

import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.dispatcher.StrutsResultSupport;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.util.ValueStack;

public class ChartResult extends StrutsResultSupport{
   /**
  * 
  */
   private static final long serialVersionUID = 1L;
   private String width;
   private String height;
   private String imageType;

 public String getWidth() {
  return width;
 }

 public void setWidth(String width) {
  this.width = width;
 }

 public String getHeight() {
  return height;
 }

 public void setHeight(String height) {
  this.height = height;
 }

 public String getImageType() {
  return imageType;
 }

 public void setImageType(String imageType) {
  this.imageType = imageType;
 }

 @Override
 protected void doExecute(String arg0, ActionInvocation invocation)
   throws Exception {
  JFreeChart chart =(JFreeChart) invocation.getStack().findValue("chart");   //add by _zZ begin 
  ValueStack stack = invocation.getStack();
   height = conditionalParse(height, invocation);
   width = conditionalParse(width, invocation); 
  imageType = conditionalParse(imageType, invocation); //add by _zZ end 
  HttpServletResponse response = ServletActionContext.getResponse(); 
   OutputStream os = response.getOutputStream();  //add by _zZ begin  
  int h = Integer.parseInt(height); 
  int w = Integer.parseInt(width); //add by _zZ end 
  if("jpeg".equalsIgnoreCase(imageType) || "jpg".equalsIgnoreCase(imageType))  
  ChartUtilities.writeChartAsJPEG(os, chart, w, h); 
   else if("png".equalsIgnoreCase(imageType))  ChartUtilities.writeChartAsPNG(os, chart, w, h); 
   else  ChartUtilities.writeChartAsJPEG(os, chart, w, h);   
  os.flush(); 
 
 }

}
struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
 "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 "http://struts.apache.org/dtds/struts-2.0.dtd">
  
<struts>
     <package name="jfreeChart" extends="jfreechart-default" >
   <result-types>
     <result-type name="chart" class="org.apache.struts2.dispatcher.ChartResult" >
      <param name="width">${width}</param>
      <param name="height">${height}</param>
      </result-type>
      <result-type name="chart" class="com.nec.jp.railroadX.tzz.tbc03.ChartResult"></result-type>
     </result-types>
           <action name="updatetbc03Action" class="com.nec.jp.railroadX.tzz.tbc03.Tbc03Action" >
     <result name="success" >
        /TBC03/STBC0301.jsp
       </result>
       </action>  
  </package>
  
</struts>
 STBC0301.jsp

<s:form action="updatetbc03Action" method="get">

 <s:submit value="更新"  ></s:submit>

<img id="imgShow"  src="img.jsp" usemap="<s:property value='hy_filename'/>" >

 

 

參考http://developer.51cto.com/art/201112/308498.htm