代码如下,但是图片显示不出来。不知道是怎么回事。清高手指教!
<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="org.jfree.chart.ChartFactory,org.jfree.chart.JFreeChart,
org.jfree.chart.plot.PlotOrientation,
org.jfree.chart.servlet.ServletUtilities,
org.jfree.data.category.DefaultCategoryDataset"%>
<%@ page import = "java.io.PrintWriter" %>
<%
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;
%>
<Img src="<%=graphURL%>" width=500 height=300 border=0 usemap="<%= filename%>">
<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="org.jfree.chart.ChartFactory,org.jfree.chart.JFreeChart,
org.jfree.chart.plot.PlotOrientation,
org.jfree.chart.servlet.ServletUtilities,
org.jfree.data.category.DefaultCategoryDataset"%>
<%@ page import = "java.io.PrintWriter" %>
<%
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;
%>
<Img src="<%=graphURL%>" width=500 height=300 border=0 usemap="<%= filename%>">
用resin,则修改conf\app-default.xml
请教各位.
<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<%@ page import="org.jfree.chart.ChartFactory,
org.jfree.chart.JFreeChart,
org.jfree.chart.plot.PlotOrientation,
org.jfree.chart.servlet.ServletUtilities,
org.jfree.data.DefaultCategoryDataset"%>
<%
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;
%>
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>">