JSP实用教程实验六servlet的应用

实验六 servlet的应用

一、实验目的

1. servlet的部署、创建、运行。

2. servlet的各种方法，主要service、doGet、doPost方法。

3. 重定向与转发。

4. 掌握servlet创建、部署，理解servlet运行原理，掌握service、doGet、doPost方法的应用，会用JSP表单调用servlet。

二、实验内容

1、教材6.8.1节绘制多边形数。

2、教材6.8.2节双色球福利彩票。

3、教材6.8.3节分析整数。

三、实验步骤

1.绘制多边形数

① 实验代码

文件：ch6_1.jsp

<%@ page contentType="text/html" %><%@ page pageEncoding = "utf-8" %><%
		String s ="(25,230)(210,24)(410,240)(225,425)";
		%>
输入多边形的顶点,格式是（m,n）
m,n为整数 0<=m<=800,0<=n<=600
<%= s %>

文件：DrawPolygon_Servlet.java

package one;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.awt.image.BufferedImage;
import java.awt.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.awt.geom.*; 
import javax.imageio.ImageIO;
public class DrawPolygon_Servlet extends HttpServlet{
   HttpServletRequest request;
   HttpServletResponse response;
   public void init(ServletConfig config) throws ServletException{
      super.init(config);
   }
   public void service(HttpServletRequest request,HttpServletResponse response)
                       throws IOException{
      request.setCharacterEncoding("utf-8");
      String polygonVertex = request.getParameter("polygonVertex");
      if(polygonVertex == null||polygonVertex.length()==0){
          response.sendRedirect("ch6_1.jsp");
          return;
      }
      response.setContentType("image/jpeg");
      Polygon  polygon = getPolygon(polygonVertex);
      BufferedImage image = getImage(polygon);
      OutputStream outClient= response.getOutputStream();
      boolean boo =ImageIO.write(image,"jpeg",outClient);
   }
   Polygon getPolygon(String polygonVertex){ 
      Polygon polygon = new Polygon();
      Pattern pattern;
      Matcher matcher;
      String regex="(\\d+[,， ]+\\d+)" ;
      pattern = Pattern.compile(regex);
      matcher = pattern.matcher(polygonVertex);
      while(matcher.find()) {
         String str = matcher.group(); 
         String []vertex = str.split("[( ),， ]+");
         polygon.addPoint(Integer.parseInt(vertex[0]),Integer.parseInt(vertex[1]));
      } 
      return polygon;
   }
   BufferedImage getImage(Shape shape){
        int width=1000, height=800;
        BufferedImage image = 
        new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
        Graphics g = image.getGraphics();
        g.fillRect(0, 0, width, height);
        Graphics2D g_2d=(Graphics2D)g; 
        g_2d.setColor(Color.blue);
        g_2d.draw(shape); 
        return image;
   }
}

文件：web.xml

  drawPolygon one.DrawPolygon_Servlet   drawPolygon /drawPolygon

② 运行结果

2.双色球福利彩票

①实验代码

文件：ch6_2.jsp

<%@ page contentType="text/html" %><%@ page pageEncoding = "utf-8" %>
输入6个红球号码(1-33)逗号或非数字字符分隔:

输入1个蓝球号码(1-16):

文件：Lottery_Servlet.java

package two;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.util.*;
public class Lottery_Servlet extends HttpServlet{
   public void init(ServletConfig config) throws ServletException{
      super.init(config);
   }
   public void  service(HttpServletRequest request,HttpServletResponse response)
                       throws IOException{
      request.setCharacterEncoding("utf-8");
      response.setContentType("text/html;charset=utf-8");
      PrintWriter out=response.getWriter();
      out.println("");
      String digitRedball = request.getParameter("digitRedball");
      String digitBlueball = request.getParameter("digitBlueball");
      if(digitRedball.length()==0 ||digitBlueball.length()==0) {
          response.sendRedirect("ch6_2.jsp");
          return;
      }
      HashSet userRedball =  getUserDigit(digitRedball);
      HashSet userBlueball = getUserDigit(digitBlueball);
      if(userRedball.size()!=6||userBlueball.size()!=1){
          response.sendRedirect("buyLottery.jsp");
          return;
      }
      HashSet drawLotteryRedball = drawLottery(6,33);
      HashSet  drawLotteryBlueball = drawLottery(1,16);
      out.print("摇奖出的红球
"+drawLotteryRedball.toString()+"
");
      out.print("摇奖出的蓝球"+drawLotteryBlueball.toString()+"");
      drawLotteryRedball.removeAll(userRedball);
      drawLotteryBlueball.removeAll(userBlueball);
      int leftRedball = drawLotteryRedball.size();
      int leftBlueball = drawLotteryBlueball.size();
      if(leftRedball == 0&&leftBlueball == 0){ 
          out.println("头奖");
      }
      else if(leftRedball == 0&&leftBlueball == 1){
          out.println("二等奖");
      }
      else if(leftRedball == 1&&leftBlueball == 0){
          out.println("三等奖");
      }
      else{
          out.println("没中奖");
      }
      out.print("用户买的红球
"+userRedball.toString()+"
");
      out.print("用户买的蓝球"+userBlueball.toString()+"");
   } 
   public HashSet getUserDigit(String input){
      HashSet set = new HashSet();
      Pattern pattern;   
      Matcher matcher; 
      String regex="[0-9][0-9]*" ;
      pattern = Pattern.compile(regex);
      matcher = pattern.matcher(input);
      double sum = 0;
      while(matcher.find()) {
         String str = matcher.group(); 
         set.add(Integer.parseInt(str));
      } 
      return set;
   }
    public HashSet drawLottery(int count,int allNumber){ 
        LinkedList saveNumber = new LinkedList();
        HashSet set = new HashSet();
        for(int i=1;i<=allNumber;i++) { 
            saveNumber.add(i); 
        } 
        Random random = new Random(); 
        while( count > 0) {
           int index = random.nextInt(saveNumber.size());  
           int number = saveNumber.remove(index); 
           count--;
           set.add(number);
        }
        return  set;  
    }
}

文件：web.xml

  lottery two.Lottery_Servlet  lottery /lottery

②运行结果

3.分析整数

①实验代码

文件：ch6_3.jsp

<%@ page contentType="text/html" %><%@ page pageEncoding = "utf-8" %>

输入整数，用逗号或非数字字符分隔:

文件：HandleForward.java

package three;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HandleForward_Servlet extends HttpServlet{
   public void init(ServletConfig config) throws ServletException{
      super.init(config);
   }
   public void  service(HttpServletRequest request,HttpServletResponse response) 
                       throws ServletException,IOException{
      RequestDispatcher dispatcher = null; 
      request.setCharacterEncoding("utf-8");
      response.setContentType("text/html;charset=utf-8");
      String mess = request.getParameter("submit");
      String integers = request.getParameter("number");
      if(integers == null ||integers.length()==0) {
          response.sendRedirect("ch6_3.jsp");
          return;
      }
      if(mess.contains("personOne")) {
          dispatcher = request.getRequestDispatcher("personOne");
          dispatcher.forward(request,response);
      }
      else if(mess.contains("personTwo")){
          dispatcher = request.getRequestDispatcher("personTwo");
          dispatcher.forward(request,response);
      }
   } 
}

文件：PersonOne_Servlet.java

package three;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class PersonOne_Servlet extends HttpServlet{
   public void init(ServletConfig config) throws ServletException{
      super.init(config);
   }
   public void  service(HttpServletRequest request,HttpServletResponse response)
                       throws ServletException,IOException{
      request.setCharacterEncoding("utf-8");
      response.setContentType("text/html;charset=utf-8");
      PrintWriter out=response.getWriter();
      String integers = request.getParameter("number");
      String backMess = analysisIntegers(integers); 
      out.print(""+backMess+"");
   } 
   public String analysisIntegers(String input){  
      Pattern pattern;
      Matcher matcher;
      String regex="-?[0-9][0-9]*" ;
      pattern = Pattern.compile(regex);
      matcher = pattern.matcher(input);
      StringBuffer evenNumbers = new StringBuffer("
偶数:");
      StringBuffer oddNumbers  = new StringBuffer("
奇数:");
      while(matcher.find()) {
         String str = matcher.group(); 
         if(Integer.parseInt(str)%2==0){
              evenNumbers.append(str+",");
         }
         else {
              oddNumbers.append(str+",");
         }
      } 
      StringBuffer buffer = evenNumbers.append(oddNumbers);
      return new String(buffer);
   }
}

文件：PersonTwo_Servlet.java

package three;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class PersonTwo_Servlet extends HttpServlet{
   public void init(ServletConfig config) throws ServletException{
      super.init(config);
   }
   public void  service(HttpServletRequest request,HttpServletResponse response)
                       throws ServletException,IOException{
      request.setCharacterEncoding("utf-8");
      response.setContentType("text/html;charset=utf-8");
      PrintWriter out=response.getWriter();
      String integers = request.getParameter("number");
      String backMess = analysisIntegers(integers); 
      out.print(""+backMess+"");
   } 
   public String analysisIntegers(String input){  
      Pattern pattern;
      Matcher matcher;
      String regex="-?[0-9][0-9]*" ;
      pattern = Pattern.compile(regex);
      matcher = pattern.matcher(input);
      StringBuffer numbersZero = new StringBuffer("3的倍数:
");
      StringBuffer numbersOne = new StringBuffer("
除以3余1:
");
      StringBuffer numbersTwo = new StringBuffer("
除以3余2:
");
      while(matcher.find()) {
         String str = matcher.group(); 
         if(Integer.parseInt(str)%3==0){
              numbersZero.append(str+",");
         }
         else if(Integer.parseInt(str)%3==1){
              numbersOne.append(str+",");
         }
          else if(Integer.parseInt(str)%3==2){
              numbersTwo.append(str+",");
         }
      } 
      StringBuffer buffer = numbersZero.append(numbersOne.append(numbersTwo));
      return new String(buffer);
   }
}

文件：web.xml

  handleForward three.HandleForward_Servlet   handleForward /handleForward   personOne three.PersonOne_Servlet   personOne /personOne   personTwo three.PersonTwo_Servlet   personTwo /personTwo

②运行结果

四、实验总结

本次实验使用from表单对servlet的请求操作以及一些有关servlet的相关操作处理，掌握servlet创建、部署。使用了重定向对页面的有关操作。其中实验中把三个实验的web.xml文件写在了一个web.xml文件中。

分类:热门推荐日期:2024-05-07浏览:1评论:0

实验六 servlet的应用

一、实验目的

二、实验内容

三、实验步骤

四、实验总结

文件 整数

相关推荐

JSP实用教程实验六servlet的应用

分类:热门推荐日期:2024-05-07浏览:1评论:0

实验六 servlet的应用

一、实验目的

二、实验内容

三、实验步骤

摇奖出的红球"+drawLotteryRedball.toString()+""); out.print("摇奖出的蓝球"+drawLotteryBlueball.toString()+"

头奖

二等奖

三等奖

没中奖

用户买的红球"+userRedball.toString()+""); out.print("用户买的蓝球"+userBlueball.toString()+"

四、实验总结

文件整数

相关推荐

摇奖出的红球
"+drawLotteryRedball.toString()+"
"); out.print("摇奖出的蓝球"+drawLotteryBlueball.toString()+"

用户买的红球
"+userRedball.toString()+"
"); out.print("用户买的蓝球"+userBlueball.toString()+"