Java Web开发之道 光盘源码2

package com.servlet; import java.io.FileOutputStream; import java.io.IOException; import java.io.PrintWriter; import java.text.DecimalFormat; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartRenderingInfo; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.CategoryLabelPositions; import org.jfree.chart.entity.StandardEntityCollection; import org.jfree.chart.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.labels.StandardCategoryItemLabelGenerator; import org.jfree.chart.labels.StandardCategoryToolTipGenerator; import org.jfree.chart.labels.StandardPieSectionLabelGenerator; import org.jfree.chart.labels.StandardPieToolTipGenerator; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PiePlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.BarRenderer; import org.jfree.chart.title.TextTitle; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.data.general.DefaultPieDataset; import org.jfree.ui.TextAnchor; import com.dao.AreaDao; import com.dao.OptionDao; import com.valuebean.AreaBean; import com.valuebean.OptionBean; /************************************* 版权所有: 吉林省明日科技有限公司 完成日期： 2010-09-15 项目出处： 编程词典 服务社区： www.mingribook.com 学习社区： www.mrbccd.com *************************************/ public class VoteServlet extends HttpServlet{ private int width=0; private int height=0; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { width=0; height=0; String servletPath=request.getServletPath(); if("/vote".equals(servletPath)) vote(request,response); else if("/showresult".equals(servletPath)) showresult(request,response); } private void vote(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String message=""; String showpage=""; int optionid=Integer.parseInt(request.getParameter("movie")); int i=new OptionDao().vote(optionid); if(i<=0){ message="× 投票失败！"; showpage="fail.jsp"; } else{ HttpSession session=request.getSession(); session.setMaxInactiveInterval(3600); session.setAttribute("ido","yes"); showpage="success.jsp"; } request.setAttribute("message",message); RequestDispatcher rd=request.getRequestDispatcher(showpage); rd.forward(request,response); } protected void showresult(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String forward=""; Map args=getParams(request); String action=(String)args.get("action"); String method=(String)args.get("method"); String showmode=(String)args.get("showmode"); JFreeChart chart=null; if("pie".equals(showmode)) //绘制饼型图 chart=getChartForPie(action,method); else //绘制柱型图 chart=getChartForBar(action,method); if(chart!=null){ myplot(showmode,chart); //设置各标签的显示样式 String webName=getServletContext().getRealPath("/plot"); String prefix=action+"_"+method+"_"+showmode; String picpath=webName+"/"+prefix+".jpg"; //图片文件路径 String mappath=webName+"/"+prefix+".map"; //热区文件路径 FileOutputStream plot_fos=new FileOutputStream(picpath); PrintWriter map_pw =new PrintWriter(mappath); ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); ChartUtilities.writeChartAsJPEG(plot_fos,0.8f,chart,width,height,info); //生成图片文件 ChartUtilities.writeImageMap(map_pw, "mymap", info,false); //生成热区文件 plot_fos.close(); map_pw.close(); request.setAttribute("path",prefix); forward="/showresult.jsp"; } else{ request.setAttribute("message","●您所查看的时间段中没有数据！"); forward="/fail.jsp"; } RequestDispatcher rd=request.getRequestDispatcher(forward); rd.forward(request,response); } private Map getParams(HttpServletRequest request){ HttpSession session=request.getSession(); String action=request.getParameter("action"); //获取进行统计的对象：option- 统计各选项的得票数; area - 统计各省的投票数 String method=request.getParameter("method"); //获取统计数据的方法：all - 全部； day - 日统计；month - 月统计 String showmode=request.getParameter("showmode"); //获取显示结果的方式：var - 柱状图； pie - 饼型图 //统计的对象 if(action==null||action.equals("")||(!action.equals("option")&&!action.equals("area"))) action=(String)session.getAttribute("action"); else session.setAttribute("action",action); //统计的方法 if(method==null||method.equals("")||(!method.equals("all")&&!method.equals("day")&&!method.equals("month"))) method=(String)session.getAttribute("method"); else session.setAttribute("method", method); //显示的方式 if(showmode==null||showmode.equals("")||(!showmode.equals("bar")&&!showmode.equals("pie"))) showmode=(String)session.getAttribute("showmode"); else session.setAttribute("showmode", showmode); if(action==null||action.equals("")||!action.equals("area")) action="option"; if(method==null||method.equals("")||(!method.equals("day")&&!method.equals("month"))) method="all"; if(showmode==null||showmode.equals("")||!showmode.equals("pie")) showmode="bar"; HashMap args=new HashMap(); args.put("action",action); args.put("method",method); args.put("showmode",showmode); return args; } /**　@功能：获取柱型图的JFreeChart */ private JFreeChart getChartForBar(String action,String method){ CategoryDataset dataset=null; JFreeChart chart=null; String title1=""; String title2=""; String subtitle=""; PlotOrientation way=null; if("day".equals(method)) subtitle="－日统计(今日)"; else if("month".equals(method)) subtitle="－月统计(当前月)"; if("area".equals(action)){ //处理查看"各省的投票数"的请求 dataset = getDataSetForBarAndArea(method); //获取数据集 title1="各省所投票数图"; title2="省份"; way=PlotOrientation.HORIZONTAL; width=500; height=100+25*dataset.getColumnCount(); if(dataset!=null&&dataset.getColumnCount()>0){ chart = ChartFactory.createBarChart(title1,title2,"票数",dataset,way,false,true,false); chart.addSubtitle(new TextTitle(subtitle)); } } else{ //处理查看"各选项得票数"的请求 dataset = getDataSetForBarAndOption(method); //获取数据集 title1="各项所得票数"; title2="选项"; way=PlotOrientation.VERTICAL; width=80+50*dataset.getColumnCount(); height=400; if(dataset!=null&&dataset.getColumnCount()>0){ chart = ChartFactory.createBarChart3D(title1,title2,"票数",dataset,way,false,true,false); chart.addSubtitle(new TextTitle(subtitle)); } } return chart; } private CategoryDataset getDataSetForBarAndOption(String method) { OptionDao optionDao=new OptionDao(); List options=null; if("all".equals(method)) options=optionDao.getOptions(); else if("day".equals(method)) options=optionDao.getOptionsForDay(); else if("month".equals(method))