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";
    }
}