Struts2整合jfreechart

action

package org.vle.action;

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

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.DefaultCategoryDataset;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class TpupiaoAction extends ActionSupport

{

    private JFreeChart chart;
    private List<String> toupiao;


    public List<String> getToupiao()

{
        return toupiao;
    }

    public void setToupiao(List<String> toupiao)

{
        this.toupiao = toupiao;
    }

    public JFreeChart getChart()

{
        DefaultCategoryDataset set=this.getDataSet();
        this.chart=ChartFactory.createBarChart("投票统计图", "项目", "票数",set, PlotOrientation.VERTICAL, true, false, false);
        chart.setTitle(new TextTitle("投票统计图",new Font("宋体",Font.BOLD,28)));
        CategoryPlot plot=(CategoryPlot) chart.getPlot();
        CategoryAxis axis=plot.getDomainAxis();
        axis.setLabelFont(new Font("黑体",Font.BOLD,18));
        axis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
         axis.setTickLabelFont(new Font("宋体",Font.PLAIN,15));

        NumberAxis number=(NumberAxis) plot.getRangeAxis();
        number.setLabelFont(new Font("黑体",Font.BOLD,18));
        return this.chart;
    }

    @Override
    public String execute() throws Exception

{
        // TODO Auto-generated method stub
        return SUCCESS;
    }

    private DefaultCategoryDataset getDataSet()

{
        DefaultCategoryDataset set=new DefaultCategoryDataset();
        this.add(toupiao);
        ActionContext context=ActionContext.getContext();
        Map map=context.getApplication();
        set.addValue((Integer)map.get("zu"), "", "足球");

        set.addValue((Integer)map.get("lan"), "", "篮球");
        set.addValue((Integer)map.get("pai"), "", "排球");
        set.addValue((Integer)map.get("yu"), "", "羽毛球");

        return set;
    }

    @SuppressWarnings(

{ "unchencked", "unchecked" })
private void add(List<String> list)

{
        ActionContext context=ActionContext.getContext();
        Map map=context.getApplication();
        if(list!=null)

{
for(String s:list)

{
if(map.get(s)==null)

{//如果还没有得到投票
map.put(s, 1);
}else

{
                    map.put(s, (Integer)map.get(s)+1);
                }
            }
        }
    }
}

xml配置

</struts>

投票jsp

</body>

需要引入jfreechart的插件包

Struts2整合jfreechart

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