mate_jfreechartservlet.java

JSP移动商品管理平台源代码.........

package imis_mate.servlet;

import imis_mate.common.MateByJFree;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.servlet.ServletUtilities;

public class Mate_JFreeChartServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Mate_JFreeChartServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
	
		String pattern = request.getParameter("pattern");
		if(pattern.equals("buyJfreePag")) {
			this.buyJfreePag(request,response);
		}else if(pattern.equals("outJfreePag")) {
			this.outJfreePag(request,response);
		}else if(pattern.equals("jfreePag")){
			this.jfreePag(request,response);
		}

	}




	private void jfreePag(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
		// TODO Auto-generated method stub
		String displayType = request.getParameter("displayType");
		String materialTypeNo = request.getParameter("materialTypeNo");
		String startDate = request.getParameter("startDate");
		String endDate = request.getParameter("endDate");
//		String applyDep = request.getParameter("applyDep");
		String type = request.getParameter("type");
		String title = "";
		String y = "";		// y轴标题
		
		if(type.equals("1")) {
			title = "数量构成";
			y = "数量";
		} else {
			title = "价格构成";
			y = "价格";
		}
		
		String filename = "";
		HashMap table = MateByJFree.getTongjiTu(materialTypeNo, startDate, endDate,type);
		ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
		if(displayType.equals("pie")) { 		//面积比例饼图	//500是图片长度，300是图片高度
			filename = ServletUtilities.saveChartAsPNG(MateByJFree.getchart(table,1,title,y), 500, 300, info, request.getSession());
		} else if(displayType.equals("bar")) {		//柱状图
			filename = ServletUtilities.saveChartAsPNG(MateByJFree.getchart(table,2,title,y), 500, 300, null, request.getSession());
		} else if(displayType.equals("line")) {
			filename = ServletUtilities.saveChartAsPNG(MateByJFree.getchart(table,3,title,y), 500, 300, null, request.getSession());
		}
		String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename; 
		
		request.setAttribute("graphURL", graphURL);
		request.getRequestDispatcher("../imis_mate/mate_JFree.jsp").forward(request, response);
	}

	private void outJfreePag(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		request.getRequestDispatcher("../imis_mate/mate_Out_JFree.jsp").forward(request, response);
	}

	private void buyJfreePag(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		request.getRequestDispatcher("../imis_mate/mate_JFree.jsp").forward(request, response);
	}

	public void init() throws ServletException {
		// Put your code here
	}

}