📄 bar.jsp
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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*,
java.util.*,
org.jfree.chart.JFreeChart,
org.jfree.chart.servlet.ServletUtilities,
java.util.Iterator,
java.util.Hashtable,
org.jfree.chart.ChartFactory,
org.jfree.chart.plot.PlotOrientation,
org.jfree.data.DefaultCategoryDataset,
imis_hous.com.impl.*" errorPage="" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<jsp:directive.page import="imis_hous.jfree.Hous_tongji"/>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<jsp:useBean id="hous" class="imis_hous.jfree.Hous_tongji"/>
<html>
<head>
<link href="/Imis/imis_hous/css/style.css" rel="stylesheet" type="text/css">
<script language="JavaScript" src="/Imis/imis_hous/jf/checkdata.js">
</script>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>无标题文档</title>
<style type="text/css">
<!--
.style4 {font-size: 14px}
.style5 {font-size: 18px}
-->
</style>
</head>
<script type="text/javascript">
function piepie(){
form1.action="/Imis/servlet/JfreeChar_sl?xianshi=pie";
form1.submit()="";
}
function barbar(){
form1.action="/Imis/servlet/JfreeChar_sl?xianshi=bar";
}
function tabletable(){
form1.action="/Imis/servlet/JfreeChar_sl?xianshi=table";
}
</script>
<body background="/Imis/imis_hous/Add/images/bg_main.png">
<c:if test="${requestScope.assignTongjiList!=null}">
<%
Hashtable deptRoomArea = (Hashtable)request.getAttribute("deptRoomArea");
Hashtable deptRoomShu = (Hashtable)request.getAttribute("deptRoomShu");
//面积柱状图
String filename3 = ServletUtilities.saveChartAsPNG(getchart(deptRoomArea,"部门用房面积比例"), 500, 300, null, session);
String graphURL3 = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename3;
//数量柱状图
String filename4 = ServletUtilities.saveChartAsPNG(getchart(deptRoomShu,"部门用房数量比例"), 500, 300, null, session);
String graphURL4 = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename4;
%>
<%!public static JFreeChart getchart(Hashtable hash,String title){
JFreeChart chart=null;
int length = hash.size();
String []deptname = new String[length];//部门数组
float []deptarea = new float[length];//部门用房面积数组
//
Iterator areaPieKey = hash.keySet().iterator();//键迭代
Iterator areaPieValue = hash.values().iterator();//值迭代
int i=0;
while(areaPieKey.hasNext()){
deptname[i]=(String)areaPieKey.next();
i++;
}
i=0;
while(areaPieValue.hasNext()){
deptarea[i]=Float.parseFloat(areaPieValue.next().toString());
i++;
}
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
for(int j=0;j<length;j++ ){
dataset.addValue(deptarea[j],"",deptname[j]);
}
chart = ChartFactory.createBarChart3D(
title, // 图表标题
"部门", // 目录轴的显示标签
"房间数", // 数值轴的显示标签
dataset, // 数据集
PlotOrientation.VERTICAL, // 图表方向：水平、垂直
false, // 是否显示图例(对于简单的柱状图必须是false)
false, // 是否生成工具
false // 是否生成URL链接
);
return chart;
}
%>
<table>
<tr><!-- 拄状图 -->
<td><img src="<%= graphURL3 %>" width=375 height=225 border=0 ></td>
<td><img src="<%= graphURL4 %>" width=375 height=225 border=0 ></td>
</tr>
</table>
</c:if>
</body>
</html>
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