result_let.java

一个基于JSP的在线动物识别系统

package main;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

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 function.*;
public class result_let extends HttpServlet {
	public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException, IOException{
		request.setCharacterEncoding("UTF-8");
		HttpSession session=request.getSession();
		ArrayList<String> rules=(ArrayList<String>)(session.getAttribute("allrules"));
		String num_of_question=(String)(session.getAttribute("num_of_question"));
		String mark=(String)(session.getAttribute("mark"));
		response.setContentType("text/html;charset=UTF-8");
		PrintWriter outPrintWriter=null;
		outPrintWriter=response.getWriter();
		if(rules==null||num_of_question==null||mark==null||!mark.equals("artificial")){
			CommonHTML common=new CommonHTML();
			outPrintWriter.println(common.GetErrorPageHTML("No data initialized!"));
			return;
		}
		int number=Integer.parseInt(num_of_question);
		CurrentData cd=new CurrentData();
		String[]temp=new String[number]; 
		int i=0;
		ArrayList<String> ques=new ArrayList<String>();
		for(String t:rules){
			String []rule=t.split(" ");
			int length=rule.length;
			for(int j=0;j<length-1;j++){
				if (!ques.contains(rule[j])) {
					temp[i++] = rule[j];
					ques.add(rule[j]);
				}
			}
		}
		for(int j=1;j<=number;j++){
			String value=null;
			 value=new String(request.getParameter("answer"+j).getBytes("ISO8859_1"));
			//value=request.getParameter("answer"+j);
			if(value.equals("yes")){
				cd.AddString(temp[j-1]);
			}
		}
		Ratiocination ratiocination=new Ratiocination(cd,rules);
		boolean resultFlag=ratiocination.RationcinationProcess();
		ArrayList<String> result=ratiocination.GetResult();
		ArrayList<String> process=ratiocination.GetProcess();
		StringBuffer HTMLbuffer=new StringBuffer();
		//加入的图片元素
		String imageString=null;
		if(!resultFlag){
			imageString=getServletContext().getRealPath("/")+"WEB-INF/classes/pic/问号.jpg";
			HTMLbuffer.append("no answer!<br>");
			if(result!=null){
				HTMLbuffer.append("But i know some information: ");
				for(String t:result){
					HTMLbuffer.append(t+"  ");
				}
				HTMLbuffer.append("<br>\n");
			}
		}
		else{
			HTMLbuffer.append("it is ");
			for(String t:result){
				if(t.endsWith("?")){
					String tempString=(t.replace('?', ' ')).trim();
					HTMLbuffer.append(tempString);
					imageString=getServletContext().getRealPath("/")+"WEB-INF/classes/pic/"+tempString+".jpg";
					File imageFile=new File(imageString);
					if(!imageFile.exists()){
						imageString=null;
					}
				}
			}
			HTMLbuffer.append("<br>and the processes are:<br>\n");
			for(String t:process){
				String [] tuples=t.split(" ");
				HTMLbuffer.append("IF "+tuples[0]+" ");
				int length=tuples.length;
				for(int j=1;j<length-1;j++){
					HTMLbuffer.append("AND "+tuples[j]+" ");
				}
				HTMLbuffer.append("THEN "+tuples[length-1]+"<br>\n");
			}
		}
		if(imageString==null){
			imageString=getServletContext().getRealPath("/")+"WEB-INF/classes/pic/问号.jpg";
		}
		HTMLbuffer.append("\n<br>\n<table>\n<tr>\n<td>\n<img src=\""+imageString+"\">\n</td>\n</tr></table>");
		HTMLbuffer.append("\n<br>\n<input type=\"submit\" name=\"again\" value=\"Play again\">");
		CommonHTML commonHTML=new CommonHTML();
		outPrintWriter.println(commonHTML.GetFormHTML("result", "ratiocination_let","get", HTMLbuffer.toString(),""));
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException, IOException{
		doGet(request, response);
	}
}