JFreeChart与struts2整合实例

1. 3个jar包

jcommon,jfreechart,strust2-jfreechart-plugin

2

 <?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>
     <package name="default2" namespace="/" extends="jfreechart-default,struts-default">
     <action name="resultAction" class="com.goshop.action.ShowResultAction" >
           <result name="success"   type="chart">
                 <param name="width">400</param>
                 <param name="height">300</param>
             </result>
         </action>
     </package>
 </struts>

3.

 package com.goshop.action;

 import java.awt.Font;
 import java.util.List;

 import javax.annotation.Resource;

 import org.jfree.chart.ChartFactory;
 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.axis.CategoryAxis;
 import org.jfree.chart.axis.NumberAxis;
 import org.jfree.chart.plot.CategoryPlot;
 import org.jfree.chart.plot.PlotOrientation;
 import org.jfree.data.category.DefaultCategoryDataset;
 import org.springframework.stereotype.Controller;

 import com.goshop.domain.VoteOption;
 import com.goshop.service.IVoteOptionService;
 import com.opensymphony.xwork2.ActionSupport;

 @Controller
 public class ShowResultAction extends ActionSupport {

     private int voteID;
     private int channelID;

     public int getVoteID() {
         return voteID;
     }

     public void setVoteID(int voteID) {
         this.voteID = voteID;
     }

     public int getChannelID() {
         return channelID;
     }

     public void setChannelID(int channelID) {
         this.channelID = channelID;
     }

     @Resource
     private IVoteOptionService optionService;
     private JFreeChart chart;

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

         List<VoteOption> voteOptionList = optionService
                 .selectVoteOptionsByVoteId(voteID);
         DefaultCategoryDataset ds = new DefaultCategoryDataset();
         for (VoteOption option : voteOptionList) {
             ds.addValue(option.getTicketNum(), option.getVoteOptionName(), "");
         }
         JFreeChart chart = ChartFactory.createBarChart("球星投票结果", "投票选项", "投票数",
                 ds, PlotOrientation.VERTICAL, true, false, false);
         CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
         NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
         CategoryAxis domainAxis = categoryplot.getDomainAxis();

         /*------设置X轴坐标上的文字-----------*/
         domainAxis.setLabelFont(new Font("sans-serif", Font.PLAIN, 11));
         /*------设置X轴的标题文字------------*/
         domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
         /*------设置Y轴坐标上的文字-----------*/
         numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));
         /*------设置Y轴的标题文字------------*/
         numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));

         /*------这句代码解决了底部汉字乱码的问题-----------*/
         chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));
         /******* 这句代码解决了标题汉字乱码的问题 ********/
         /******* 这句代码解决了标题汉字乱码的问题 ********/
         chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12));

         return chart;
     }

     public String execute() throws Exception {
         return "success";
     }
 }