我想用jfree圖表創建JSP餅圖,我使用此代碼jfreechart的JSP中
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page import="java.awt.*" %>
<%@ page import="java.io.*" %>
<%@ page import="org.jfree.chart.*" %>
<%@ page import="org.jfree.chart.entity.*" %>
<%@ page import ="org.jfree.data.general.*"%>
<%
final DefaultPieDataset data = new DefaultPieDataset();
data.setValue("One", new Double(43.2));
data.setValue("Two", new Double(10.0));
data.setValue("Three", new Double(27.5));
data.setValue("Four", new Double(17.5));
data.setValue("Five", new Double(11.0));
data.setValue("Six", new Double(19.4));
JFreeChart chart = ChartFactory.createPieChart
("Pie Chart ", data, true, true, false);
try {
final ChartRenderingInfo info = new
ChartRenderingInfo(new StandardEntityCollection());
final File file1 = new File("../webapps/jspchart/
web/piechart.png");
ChartUtilities.saveChartAsPNG(
file1, chart, 600, 400, info);
} catch (Exception e) {
out.println(e);
}
%>
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<IMG SRC="piechart.png" WIDTH="600" HEIGHT="400"
BORDER="0" USEMAP="#chart">
</body>
</html>
的問題是,我得到這個例外「java.io.FileNotFoundException:../ webapps/jspchart/web/piechart.png(沒有這樣的文件或目錄)「
任何想法??
我沒有得到you..which文件....抱歉,但我是新來jfreechart..t認爲它創建了一個靜態圖像,其我們稍後可以嵌入到我們的頁面 – Somye
檢查文件或此路徑是否存在:/webapps/jspchart/web/piechart.png – Tomer