用jfreechart画柱状图的时候怎么把数字标到柱子上面去呢？

这个是我在jfreechart-0.9.16.jar 下好用的代码 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><%@ page language="java" contentType="text/html;charset=gb2312"
      import="java.sql.*"
  import="java.io.*"
  import="java.util.*"
  import="javax.sql.*"
  import="javax.naming.*"
  import="java.text.*"
  import="java.lang.*"
import="org.jfree.chart.ChartFactory"
import="org.jfree.chart.JFreeChart"
import="org.jfree.chart.plot.PlotOrientation"
import="org.jfree.data.DefaultCategoryDataset"
import="org.jfree.chart.servlet.ServletUtilities"
     import="org.jfree.chart.ChartRenderingInfo"
import="org.jfree.chart.entity.StandardEntityCollection"

     import = "org.jfree.chart.ChartPanel"
     import = "org.jfree.chart.StandardLegend"
     import = "org.jfree.chart.axis.NumberAxis"
     import = "org.jfree.chart.plot.CategoryPlot"
     import = "org.jfree.chart.renderer.LineAndShapeRenderer"
     import = "org.jfree.data.CategoryDataset"
  %>
  <%

  String stringSqlString,sumSqlString;
  int rowCount;
   // sql="SELECT ALARM_TIME,SITE_ID,INFECTANT_ID,STANDARD_VALUE,ACTUAL_VALUE, MEMO FROM ALARM";
   //stringSqlString="SELECT a.ALARM_TIME, b.SITE_NAME, a.INFECTANT_ID, a.STANDARD_VALUE,a.ACTUAL_VALUE";
  // stringSqlString=stringSqlString+"a.MEMO FROM ALARM a LEFT OUTER JOIN T_DIC_SUBSITE b ON a.SITE_ID = b.SITE_ID WHERE (CONVERT(char(10), a.ALARM_TIME, 120) >= '2006-08-10') AND (CONVERT(char(10), a.ALARM_TIME, 120) <= '2006-08-16')";
   //stringSqlString=stringSqlString+" FROM ALARM a LEFT OUTER JOIN T_DIC_SUBSITE b ON a.SITE_ID = b.SITE_ID WHERE (CONVERT(char(10), a.ALARM_TIME, 120) >= '2006-08-10') AND (CONVERT(char(10), a.ALARM_TIME, 120) <= '2006-08-16')";
    stringSqlString="select id,gzs,cbs,cbzd,yxxs from lxhtest";
     ResultSet rs=query.getResult(stringSqlString);
///////////////
////////////////////
// 创建一个 500X375 的图像
int width=500, height=375;
int intArray[ ];
intArray = new int[12];
int intArray1[ ];
intArray1 = new int[12];
String chartTitle = "JFreeChart实例1: 编程类图书周销售量垂直直方图";
      //row keys...
String bookTitle[] = {"故障数", "超标数", "超标最大值", "有效小时数"};
//String bookTitle[] = {"故障数"};
String category[] = {"第1月", "第2月", "第3月", "第4月" ,"第5月", "第6月", "第7月", "第8月","第9月", "第10月", "第11月", "第12月"};
// column keys...
//String category[] = {"第1年"};
%>
<html>
<head>
<LINK href="Scripts/Global.css" type="text/css" rel="stylesheet">
<LINK href="Scripts/Web_Catalog.css" type="text/css" rel="stylesheet">
<title><%=chartTitle%></title>
</head><body>
<table align="center" id="tabList" borderColorDark="#EBEFFC" borderColor=#ffffff borderColorLight="#CCD7F7" class="itemList" border="4" cellpadding="3" cellspacing="2" width="75%">
  <tr align="center" valign="middle">
    <td>季度</td>
    <td>故障数</td>
    <td>超标数</td>
    <td>超标最大值</td>
    <td>有效小时数</td>
  </tr>
  <%
             int  k =0;
            while(rs.next()) {
   String jd=rs.getString("id");
   String gzs=rs.getString("gzs");
   String cbs=rs.getString("cbs");
   String cbzd=rs.getString("cbzd");
   String yxxs=rs.getString("yxxs");
   //////
//  bookTitle[k]=INFECTANT_ID;
//   category[k] =curdate;
// a[k]=(int)ACTUAL_VALUE;
       intArray[k]=Integer.parseInt(yxxs);
   intArray1[k]=Integer.parseInt(cbs);
         %>
  <tr class='tr1' align="center" valign="middle">
    <td><%=jd %></td>
    <td><%=gzs%></td>
    <td><%= cbs%></td>
    <td><%=cbzd %></td>
<td><%=yxxs %></td>
  </tr>
  <% k++; } /////////////////////


  %>
  <tr align="center" valign="middle">
    <td>合计</td>
    <td> </td>
    <td> </td>
    <td> </td>
    <td> </td>
  </tr>
</table>
<%
// 创建数据集
    DefaultCategoryDataset dataset = new DefaultCategoryDataset(); // 往数据集中添加绘制图表所需的数据
int bookSales;
int bookSales1;
//for (int h=0; h< intArray.length; h++)
//{
  //  bookSales =intArray[h];
    for (int i=0; i < bookTitle.length; i++)
    {
   // out.println("  %%%% "+bookSales+"  %%%% ");
    for (int j=0; j < category.length; j++ )
   {
  //bookSales = 1 + (int)(Math.random() * 100);
  // bookSales =intArray[k];
  bookSales =intArray[j];
// bookSales =intArray1[j];
//  out.print("   *** "+bookSales+" "+bookTitle[i]+" "+ category[j]+"   *** ");
        dataset.addValue(bookSales, bookTitle[i], category[j]);
bookSales =intArray1[j];
dataset.addValue(bookSales, bookTitle[i], category[j]);
//dataset.addValue(bookSales, category[j],bookTitle[i] );
//dataset.addValue(bookSales1, bookTitle[i], category[j]);
  }
     }
  // }
// 创建图表
   JFreeChart chart = ChartFactory.createBarChart
   (
        chartTitle, // 图表标题
        "销售时间:2005年2月", // 坐标标题
        "数据值",                  // 坐标标题
        dataset,                  // 定义绘制数据
        PlotOrientation.VERTICAL, // 直方图的方向
        true,                     // 定义图表是否包含图例
        true,                     // 定义图表是否包含提示
        false                     // 定义图表是否包含URL
    ); ChartRenderingInfo info =
new ChartRenderingInfo(new StandardEntityCollection());

     /////////图表上方写数字
      CategoryPlot plot = chart.getCategoryPlot();
      CategoryItemRenderer cir=plot.getRenderer();
      cir.setItemLabelsVisible(true);
/////////图表上方写数字

// 设置图表的格式及文件名
    String fileName =
ServletUtilities.saveChartAsPNG(chart, width, height, info, session);

    // 设置图表浏览路径
String graphURL =
request.getContextPath() + "/servlet/DisplayChart?filename=" + fileName;
%>
<P ALIGN="CENTER">
       <img src="<%=graphURL %>" border="1" >
       </P>
       </body>
</html>
<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="java.awt.Color,
                java.awt.Font,
                org.jfree.chart.ChartFactory,
                org.jfree.chart.JFreeChart,
                org.jfree.chart.plot.PlotOrientation,
                org.jfree.chart.servlet.ServletUtilities,
                org.jfree.data.CategoryDataset,
                org.jfree.data.DatasetUtilities,
                org.jfree.chart.plot.CategoryPlot,
                org.jfree.chart.axis.CategoryAxis,
                org.jfree.chart.axis.ValueAxis,
                org.jfree.chart.renderer.BarRenderer3D,
                org.jfree.chart.labels.StandardCategoryItemLabelGenerator,
                org.jfree.chart.axis.AxisLocation"%>
<%
??
  double[][] data = new double[][] {{672, 766, 223, 540, 126},{325, 521, 210, 340, 106},{332, 256, 523, 240, 526}};
  String[] rowKeys = {"苹果","梨子","葡萄"};
  String[] columnKeys = {"北京","上海","广州","成都","深圳"};
  CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);   JFreeChart chart = ChartFactory.createBarChart3D("水果销量图统计",
                  null,
                  null,
                  dataset,
                  PlotOrientation.VERTICAL,
                  true,false,false);
  chart.setBackgroundPaint(Color.WHITE);
  CategoryPlot plot = chart.getCategoryPlot();   CategoryAxis domainAxis = plot.getDomainAxis();
  domainAxis.setVerticalCategoryLabels(false);
  plot.setDomainAxis(domainAxis);   ValueAxis rangeAxis = plot.getRangeAxis();
  //设置最高的一个 Item 与图片顶端的距离
  rangeAxis.setUpperMargin(0.15);
  //设置最低的一个 Item 与图片底端的距离
  rangeAxis.setLowerMargin(0.15);
  plot.setRangeAxis(rangeAxis);   BarRenderer3D renderer = new BarRenderer3D();
  renderer.setBaseOutlinePaint(Color.BLACK);
  //设置 Wall 的颜色
  renderer.setWallPaint(Color.gray);
  //设置每种水果代表的柱的颜色
  renderer.setSeriesPaint(0, new Color(0, 0, 255));
  renderer.setSeriesPaint(1, new Color(0, 100, 255));
  renderer.setSeriesPaint(2, Color.GREEN);
  //设置每个地区所包含的平行柱的之间距离
  renderer.setItemMargin(0.1);
  //显示每个柱的数值，并修改该数值的字体属性
  renderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());
  renderer.setItemLabelsVisible(true);
  plot.setRenderer(renderer);   //设置柱的透明度
  plot.setForegroundAlpha(0.6f);
  //设置地区、销量的显示位置
  plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
  plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);   String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session);
  String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;
%>
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>">
看看这个，没有问题
楼主切记：JFreeChart版本不一样，代码会编译不过去了

调试易

用jfreechart画柱状图的时候怎么把数字标到柱子上面去呢？

解决方案 »