怎么用java做柱形图！！！

来源：百度知道 编辑：UC知道 时间：2024/06/17 08:52:39
如题，希望给的可以运行，产生正确的图形！！！

谢谢！！！

首先要有jfreechart.jar和jcommon-1.0.12.jar两个包然后在web.xml配置
<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/DisplayChart</url-pattern>
</servlet-mapping>
最后是jsp代码：
<%@ 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 = new double[][] {{1310}, {720}, {1130}, {440}};
String[] rowKeys = {"猪肉", "牛肉","鸡