Struts2中使用JfreeChart-CSDN博客

本文链接：https://blog.csdn.net/luobing_csdn/article/details/84352823

本文详细介绍了如何使用JFreeChart创建饼状图，并将其与Struts2框架集成，通过配置web.xml文件和struts.xml文件来实现动态生成图表功能。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1.jar
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang3-3.1.jar
commons-logging-1.1.1.jar
freemarker-2.3.19.jar
javassist-3.11.0.GA.jar
jcommon-1.0.16.jar
jfreechart-1.0.13.jar
ognl-3.0.5.jar
struts2-core-2.3.4.jar
struts2-jfreechart-plugin-2.3.4.1.jar
xwork-core-2.3.4.jar

2.web.xml


<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 <filter>
	<filter-name>struts2</filter-name>
	<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
	<filter-name>struts2</filter-name>
	<url-pattern>/*</url-pattern>
</filter-mapping>

  <!-- 
  <servlet>
    <servlet-name>jcPie</servlet-name>
    <servlet-class>com.sh.servlet.jcPie</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>jcPie</servlet-name>
    <url-pattern>/servlet/jcPie</url-pattern>
  </servlet-mapping>
   -->
<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>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

3.PieAction


package com.sh.action;

import java.awt.Font;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;

import com.opensymphony.xwork2.ActionSupport;

public class PieAction extends ActionSupport {

	private JFreeChart chart;

	public JFreeChart getChart() {
		//设置 饼图默认的数据集 
		DefaultPieDataset dataset=new DefaultPieDataset();
		dataset.setValue("古典名著", 0.3);
		dataset.setValue("青春校园", 0.1);
		dataset.setValue("儿童读物", 0.3);
		dataset.setValue("异国风情", 0.1);
		dataset.setValue("报刊杂志", 0.2);

		chart=ChartFactory.createPieChart3D("图书销量", dataset, true, true, false);
		PiePlot pieplot=(PiePlot) chart.getPlot();
		//定义一个饼图对象
		pieplot.setLabelFont(new Font("宋体",0,12));

		TextTitle txtTitle=null;
		txtTitle=chart.getTitle();
		Font font=new Font("宋体",Font.BOLD,16);
		txtTitle.setFont(font);
		chart.getLegend().setItemFont(font);

		return chart;
	}

	public void setChart(JFreeChart chart) {
		this.chart = chart;
	}

}

4.struts.xml


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts> 
   <constant name="struts.i18n.encoding" value="utf-8"/>
   <package name="default" extends="jfreechart-default">
   		<action name="pieAction" class="com.sh.action.PieAction">
   			<result name="success" type="chart">
   				<!-- 如果不设置这个 大小 默认为 200*150 -->
   				<param name="width">450</param>
   				<param name="height">300</param>
   			</result>
   		</action>		
   </package>
</struts>

5.访问 http://localhost:8083/JfreeChart/pieAction.action