JFreechart 的使用问题
<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="org.jfree.chart.JFreeChart"%>
<%@ page import="org.jfree.chart.ChartFactory"%>
<%@ page import="org.jfree.chart.plot.PlotOrientation"%>
<%@ page import="org.jfree.chart.servlet.ServletUtilities"%>
<%@ page import="org.jfree.data.DefaultCategoryDataset"%>
<%@ page import="org.jfree.chart.ChartRenderingInfo"%>
<%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%>
<%@ page import="org.jfree.chart.entity.StandardEntityCollection"%>
<%@ page import="org.jfree.chart.encoders.SunPNGEncoderAdapter"%>
<% DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(300, "广州", "苹果");
dataset.addValue(200, "广州", "梨子");
dataset.addValue(500, "广州", "葡萄");
dataset.addValue(340, "广州", "芒果");
dataset.addValue(280, "广州", "荔枝");
JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图", "水果",
"销量", dataset, PlotOrientation.VERTICAL, false, false,
false);
String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300,
null, session);
String graphURL = request.getContextPath()+ "/servlet/DisplayChart?filename=" + filename;
%>
<HTML>
<HEAD>
<TITLE>Welcome to Jfreechart !</TITLE>
</HEAD>
<BODY>
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>">
</BODY>
</HTML>
tomcat的错误
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
Only a type can be imported. org.jfree.data.DefaultCategoryDataset resolves to a package
An error occurred at line: 11 in the jsp file: /test.jsp
Generated servlet error:
DefaultCategoryDataset cannot be resolved to a type
An error occurred at line: 11 in the jsp file: /test.jsp
Generated servlet error:
DefaultCategoryDataset cannot be resolved to a type
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
问题点数：20、回复次数：3Top
1 楼flygoocn（不买日货）回复于 2006-07-18 21:35:11 得分 0
xml文件配了没有啊Top
2 楼ruanjiantaotao（涛涛）回复于 2006-07-18 22:15:05 得分 0
请看精通Java web 动态图表编程Top
3 楼maseccc（mase）回复于 2006-07-22 15:19:51 得分 0
<%@ page import="org.jfree.data.DefaultCategoryDataset"%>
改为:
<%@ page import="org.jfree.data.category.DefaultCategoryDataset"%>Top
