www.pudn.com > online-trading.rar > SalesCountServlet.java

package com.bjsxt.shopping.stat; 
 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.util.List; 
 
import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartUtilities; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.data.category.CategoryDataset; 
import org.jfree.data.category.DefaultCategoryDataset; 
 
import com.bjsxt.shopping.util.PropertyMgr; 
 
public class SalesCountServlet extends HttpServlet { 
 
	@Override 
	protected void doGet(HttpServletRequest request, 
			HttpServletResponse response) throws ServletException, IOException { 
		System.out.println("ok"); 
		CategoryDataset dataset = getDataSet(); 
		String fileName = "SalesCount.jpg"; 
		JFreeChart chart = ChartFactory.createBarChart3D("产品销量图", // 图表标题 
				"产品", // 目录轴的显示标签 
				"销量", // 数值轴的显示标签 
				dataset, // 数据集 
				PlotOrientation.VERTICAL, // 图表方向：水平、垂直 
				true, // 是否显示图例(对于简单的柱状图必须是false) 
				false, // 是否生成工具 
				false // 是否生成URL链接 
				); 
 
		FileOutputStream fos_jpg = null; 
		try { 
 
			fos_jpg = new FileOutputStream( 
					PropertyMgr.getProperty("statImagePath") + fileName); 
System.out.println(PropertyMgr.getProperty("statImagePath")); 
 
			ChartUtilities.writeChartAsJPEG(fos_jpg, 0.5f, chart, 400, 300, 
					null); 
		} finally { 
			try { 
				fos_jpg.close(); 
			} catch (Exception e) { 
				e.printStackTrace(); 
			} 
		} 
 
		request.setAttribute("imgName", fileName); 
		this.getServletContext().getRequestDispatcher("/admin/SalesCount.jsp") 
				.forward(request, response); 
 
	} 
 
	private CategoryDataset getDataSet() { 
		DefaultCategoryDataset dataset = new DefaultCategoryDataset(); 
		List items = StatService.getProductsBySaleCount(); 
		for (int i = 0; i < items.size(); i++) { 
			ProductStatItem p = items.get(i); 
			dataset.addValue(p.getTotalSalesCount(), "销量", p.getProductName()); 
		} 
		return dataset; 
	} 
 
}