看一个用不同颜色来表示不通种类的例子。在 WebRoot 的 bar 目录
下新建 sample2.jsp 页面,将其代码修改如下:
<%@ 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.CategoryDataset,
org.jfree.data.general.DatasetUtilities"%>
<%
double[][] data = newdouble[][] {{1310}, {720}, {1130}, {44
0}};
String[] rowKeys = {"猪肉", "牛肉","鸡肉", "鱼肉"};
String[] columnKeys = {""};
CategoryDataset dataset = DatasetUtilities.createCategoryDatas
et(rowKeys, columnKeys, data);
JFreeChart chart = ChartFactory.createBarChart3D("广州肉类销量
统计图", "肉类",
"销量",
dataset,
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