Question

struts2中jfreechart在jsp页面显示

在struts2.2中，如何将在Action中生成的JfreeChart显示在jsp中，希望高手能指导下，谢谢！最好能给个详细的例子

Answer 1

package consume.action;

import java.awt.Color;
import java.awt.Font;
import java.util.Iterator;
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.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.TextAnchor;
import org.springframework.stereotype.Component;

import com.opensymphony.xwork2.ActionSupport;

import consume.model.ShopList;
import consume.model.ShopListHistory;
import consume.service.ShopListHistoryService;
import consume.service.ShopListService;

@Component("barchart")
public class BarChartAction extends ActionSupport{
private JFreeChart chart;
private ShopListHistoryService shopListHistoryService;

private String type;

public JFreeChart getChart()
{
chart=ChartFactory.createBarChart3D(type+"","","",getDataSet(),PlotOrientation.VERTICAL,true,true,false);
chart.setTitle(new TextTitle(type+"",new Font("",Font.ITALIC,22)));
CategoryPlot plot=(CategoryPlot)chart.getPlot();
plot.setBackgroundPaint(Color.white);
plot.setDomainGridlinePaint(Color.pink);
plot.setRangeGridlinePaint(Color.pink);
BarRenderer3D renderer = new BarRenderer3D();
renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
renderer.setBaseItemLabelsVisible(true);
CategoryAxis categoryAxis=plot.getDomainAxis();
renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
renderer.setItemLabelAnchorOffset(10D);
categoryAxis.setLabelFont(new Font("����",Font.BOLD,22));
categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
categoryAxis.setTickLabelFont(new Font("����",Font.BOLD,18));
NumberAxis numberAxis=(NumberAxis)plot.getRangeAxis();
numberAxis.setLabelFont(new Font("����",Font.BOLD,22));
return chart;
}

private CategoryDataset getDataSet()
{
DefaultCategoryDataset dataset=new DefaultCategoryDataset();
List<ShopListHistory> shopLists=shopListHistoryService.findByType(type);
Iterator<ShopListHistory> iter=shopLists.iterator();

while(iter.hasNext())
{
ShopListHistory sl=iter.next();
dataset.setValue( sl.getCount(),"",sl.getProname());
}
return dataset;
}

public String getType() {
return type;
}

public void setType(String type) {
this.type = type;
}

public ShopListHistoryService getShopListHistoryService() {
return shopListHistoryService;
}
@Resource
public void setShopListHistoryService(
ShopListHistoryService shopListHistoryService) {
this.shopListHistoryService = shopListHistoryService;
}

}