廉頗老矣，尚能飯否

生成兩個(gè)日期間的以天為間隔的折線圖(web方式和控制臺(tái)方式)

package demo;

import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.io.FileOutputStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;

/**
 * 生成兩個(gè)日期間的以天為間隔的折線圖
 * @throws ParseException
 */
public class MyLineAndShapeChart {
 public CategoryPlot getLineAndShapeChart() throws ParseException {  
//準(zhǔn)備生成數(shù)據(jù)源需要的要素
  List<String> dateList = new ArrayList<String>();
  List<Double> valList = new ArrayList<Double>();
  
  String start = "2008-01-21";
  String end = "2008-02-08";
  //字符串轉(zhuǎn)換成日期
  SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");
  Date startDate=format.parse(start);
  Calendar startTime=Calendar.getInstance();
  startTime.clear();
  startTime.setTime(startDate);
  int startYear = startTime.get(Calendar.YEAR);
  int startMonth = startTime.get(Calendar.MONTH);
  int startDay = startTime.get(Calendar.DAY_OF_MONTH);
  Date endDate=format.parse(end);
  Calendar endTime=Calendar.getInstance();
  endTime.clear();
  endTime.setTime(endDate);
  int endYear = endTime.get(Calendar.YEAR);
  int endMonth = endTime.get(Calendar.MONTH);
  int endDay = endTime.get(Calendar.DAY_OF_MONTH);
  System.out.println("注意西方的月份從0到11，中國(guó)的月份從1到12");
  System.out.println("下面輸入的是中國(guó)的日期.注意其中的轉(zhuǎn)換問(wèn)題");
  System.out.println("start date : " + start);
  System.out.println("end date : " + end);
  
  int count = 0;
  for (int x = startYear; x <= endYear; x++) {
   //羅馬歷法產(chǎn)生年份公元1582年
   int gregorianCutoverYear = 1582;
   boolean isLeapYear = x >= gregorianCutoverYear ?
     ((x%4 == 0) && ((x%100 != 0) || (x%400 == 0))) :
      (x%4 == 0);
   //判斷是否是閏年
   //java方法
   //boolean isLeapYear = (new GregorianCalendar()).isLeapYear(x);
   
   String isBigYear = "是平年";
   if (isLeapYear) {
    isBigYear = "是閏年";
   }
   System.out.println(x + "年" + isBigYear);
   
   //獲取開始月的最大天數(shù)
   //java方法
   //SimpleDateFormat aFormat=new SimpleDateFormat("yyyy-MM-dd");
   //Date date = aFormat.parse(start);
   //Calendar time = Calendar.getInstance();
   //time.clear();
   //time.setTime(date);
   //int max=time.getActualMaximum(Calendar.DAY_OF_MONTH);//本月份的天數(shù)
   //System.out.println(max);
   
   //獲取開始月的最大天數(shù)；大月是1，3，5，7，8，10，12；小月是4，6，9，11；特殊月是2
   int max = 0;
   if (startMonth == 1) {
    if (isLeapYear) {
     max = 29;
    }
    if (!isLeapYear) {
     max = 28;
    }
   }
   if (startMonth == 3 || startMonth == 5 || startMonth == 8 || startMonth == 10) {
    max = 30;
   }
   if (startMonth == 0 || startMonth == 2 || startMonth == 4 || startMonth == 6 || startMonth == 7 || startMonth == 9 || startMonth == 11) {
    max = 31;
   }
   
   //循環(huán)每個(gè)月
   //如果在日期范圍內(nèi)月份循環(huán)時(shí)自增到了一年的最后一個(gè)月就將月份初始化到一月份
   int y = 0;
   //如果是開始日期的第一個(gè)年的月數(shù)就從開始月數(shù)循環(huán)
   if (x == startYear) {
    y = startMonth;
   }
   for (; y < 12; y++) { 
    
    //獲取當(dāng)月的最大天數(shù)；大月是1，3，5，7，8，10，12；小月是4，6，9，11；特殊月是2
    max = 0;
    if (y == 1) {
     if (isLeapYear) {
      max = 29;
     }
     if (!isLeapYear) {
      max = 28;
     }
    }
    if (y == 3 || y == 5 || y == 8 || y == 10) {
     max = 30;
    }
    if (y == 0 || y == 2 || y == 4 || y == 6 || y == 7 || y == 9 || y == 11) {
     max = 31;
    }
    
    int ty = y + 1;
    System.out.println(x + "年" + ty + "月");
    
    //循環(huán)每一天
    int z = 1;
    //如果是開始日期的第一個(gè)月的天數(shù)就從開始天數(shù)循環(huán)
    if (x == startYear && y == startMonth) {
     z = startDay;
    }
    for (; z <= max; z++) {
     count++;
     String str = x + "年" + ty + "月" + z + "日";//日期格式可以調(diào)整
     System.out.println(str);     
     dateList.add(str);
     double val = x + y * z * 100;//實(shí)際的值應(yīng)該從數(shù)據(jù)庫(kù)中獲取
     valList.add(new Double(val));
     if (x == endYear && y == endMonth && z == endDay) {
      break;
     }
    }

    //如果已經(jīng)遍歷過(guò)了截至日期的最后月份就中止月份的循環(huán)
    if (x == endYear && y == endMonth) {
     break;
    }
   
   }
  }
  
  System.out.println(start + " 到 " + end + " 的天數(shù)差：" + count);
  
 
  
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  String[] rowKeys = { "上限值", "下限值", "重量" };
  String[] columnKeys = new String[count];
  double[][] data = new double[3][count];
  
  for (int i = 0; i < count; i++) {
   columnKeys[i] = dateList.get(i);
   data[0][i] = 2500;
   data[1][i] = 1500;
   data[2][i] = valList.get(i).doubleValue();
  }
  
  
  ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);  
  
  JFreeChart chart = ChartFactory.createLineChart("工藝秤日稱重重量趨勢(shì)圖", "日期", "總量",
    dataset, PlotOrientation.VERTICAL, true, true, false);

  chart.setTextAntiAlias(false);
  chart.setBackgroundPaint(Color.WHITE);
  // 設(shè)置圖標(biāo)題的字體重新設(shè)置title
  Font font = new Font("隸書", Font.BOLD, 25);
  TextTitle title = new TextTitle("工藝秤日稱重重量趨勢(shì)圖");
  title.setFont(font);
  chart.setTitle(title);
  // 設(shè)置面板字體
  Font labelFont = new Font("SansSerif", Font.TRUETYPE_FONT, 12);

  chart.setBackgroundPaint(Color.WHITE);

  CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
  // x軸 // 分類軸網(wǎng)格是否可見
  categoryplot.setDomainGridlinesVisible(true);
  // y軸 //數(shù)據(jù)軸網(wǎng)格是否可見
  categoryplot.setRangeGridlinesVisible(true);

  categoryplot.setRangeGridlinePaint(Color.WHITE);// 虛線色彩

  categoryplot.setDomainGridlinePaint(Color.WHITE);// 虛線色彩

  categoryplot.setBackgroundPaint(Color.lightGray);

  // 設(shè)置軸和面板之間的距離
  // categoryplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));

  CategoryAxis domainAxis = categoryplot.getDomainAxis();

  domainAxis.setLabelFont(labelFont);// 軸標(biāo)題

  domainAxis.setTickLabelFont(labelFont);// 軸數(shù)值

  domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45); // 橫軸上的
  // Lable
  // 45度傾斜
  // 設(shè)置距離圖片左端距離

  domainAxis.setLowerMargin(0.0);
  // 設(shè)置距離圖片右端距離
  domainAxis.setUpperMargin(0.0);

  NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
  numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
  numberaxis.setAutoRangeIncludesZero(true);

  // 獲得renderer 注意這里是下嗍造型到lineandshaperenderer！！
  LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer) categoryplot
    .getRenderer();

  lineandshaperenderer.setBaseShapesVisible(true); // series 點(diǎn)（即數(shù)據(jù)點(diǎn)）可見

  lineandshaperenderer.setBaseLinesVisible(true); // series 點(diǎn)（即數(shù)據(jù)點(diǎn)）間有連線可見

  // 顯示折點(diǎn)數(shù)據(jù)
  // lineandshaperenderer.setBaseItemLabelGenerator(new
  // StandardCategoryItemLabelGenerator());
  // lineandshaperenderer.setBaseItemLabelsVisible(true);

  //打印到服務(wù)器
  FileOutputStream fos_jpg = null;
  //String dirs = "C:/workspace/test/map/";
  String dirs = "F:/test/";
  String fileName = "lineAndShap.png";
  String chartName = dirs + fileName;
  try {
   File file = new File(dirs);
   if (!file.exists()) {
    file.mkdirs();
   }   
   fos_jpg = new FileOutputStream(chartName);

   // 將報(bào)表保存為png文件
   ChartUtilities.writeChartAsPNG(fos_jpg, chart, 1500, 510);
  } catch (Exception e) {
   e.printStackTrace();
   return null;
  } finally {
   try {
    fos_jpg.close();
    System.out.println("ok");
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
  
  //輸出到瀏覽器
  return categoryplot;
 }
 
servlet的doGet方法中代碼

  response.setContentType("text/html");
  System.out.println("line");
  
  String factory = request.getParameter("factory");
  System.out.println(factory);
  
  MyLineAndShapeChart my = new MyLineAndShapeChart();
  CategoryPlot mm = new CategoryPlot();
  try {
   mm = my.getLineAndShapeChart();
  } catch (ParseException e) {
   e.printStackTrace();
  }
  JFreeChart chart = new JFreeChart("ssssssss", JFreeChart.DEFAULT_TITLE_FONT,
    mm, true);
  ChartRenderingInfo info = new ChartRenderingInfo(
    new StandardEntityCollection());
  String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300,
    info, request.getSession());

  String graphURL = request.getContextPath()
    + "/servlet/DisplayChart?filename=" + filename;

  RequestDispatcher rd = request.getRequestDispatcher("../form/g.jsp");
  request.getSession().setAttribute("filename", filename);
  request.getSession().setAttribute("graphURL", graphURL);
  rd.forward(request, response);
 
webInfo下的g.jsp代碼
<%@ page contentType="text/html;charset=GBK"%>
<HTML>
 <HEAD>
 </HEAD>
 <BODY>
  <P ALIGN="CENTER">
   <img src="${graphURL}" width=500 height=300 border=0
    usemap="${filename}">
  </P>
 </BODY>
</HTML>

 web.xml 文件中內(nèi)容（重要）

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 
 <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>/servlet/DisplayChart</url-pattern>
 </servlet-mapping>

 <servlet>  
<servlet-name>AServlet</servlet-name>
  <servlet-class>servlet.AServlet</servlet-class>
 </servlet>
 <servlet-mapping>
  <servlet-name>AServlet</servlet-name>
  <url-pattern>/servlet/AServlet</url-pattern>
 </servlet-mapping>
</web-app>

posted on 2009-01-14 11:47 liudecai_zan@126.com 閱讀(2247) 評(píng)論(2)  編輯  收藏 所屬分類: JFreeChart