📄 yk.jsp

📁 此资源是jsp应用开发邓子云等编写的一书里的源代码

💻 JSP

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<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<jsp:directive.page import="org.jfree.data.general.DefaultPieDataset"/>
<jsp:directive.page import="org.jfree.chart.JFreeChart"/>
<jsp:directive.page import="org.jfree.chart.ChartFactory"/>
<jsp:directive.page import="org.jfree.chart.ChartUtilities"/>
<jsp:directive.page import="java.io.OutputStream"/>
<jsp:directive.page import="java.io.FileOutputStream"/>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
   
    
    <title>My JSP 'YK.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    <%
    String datename[]={"0-30","30-50","50-70","70以上"};
    int datevalue[]={4,5,4,6};
    DefaultPieDataset pieDateset=new DefaultPieDataset();
    for(int i=0;i<datename.length;i++)
    {
    	pieDateset.setValue(datename[i],datevalue[i]);
    
    }
    
    String title="用户年龄阶段统计图";
    
   
    
    JFreeChart chart=ChartFactory.createPieChart3D(title,pieDateset,true,true,false);
   
    try {
	 		ChartUtilities.writeChartAsJPEG(response.getOutputStream(),chart,500,300);
			
		} catch (Exception e) {
			// TODO 自动生成 catch 块
			
		}
   
    
     %>
  
    
  </body>
</html>

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