jsp+servlet實(shí)現(xiàn)猜數(shù)字游戲主要用到了servlet方面的session,HttpServletResponse類中的sendRedirect()方法。
step1,客戶訪問或刷新getNumber.jsp頁面時(shí),隨機(jī)給用戶分配一個(gè)1-100之間的數(shù)字,將該數(shù)字存放到客戶的session中。
%@ page language="java" import="java.util.*"
contentType="text/html;charset=utf-8"%>
html>
head>
/head>
body>
%
String message=(String)session.getAttribute("message");
%>
form action="HandleGuess" methods="post">
input type="text" name="guessnumber" size=8>
%=message %>
input type="submit" value="提交">
/form>
form action="getNumber.jsp" method="post">
input type="submit" value="重新得到新的隨機(jī)數(shù)">
/form>
/body>
/html>
step2,然后用戶超廉價(jià)到inputNumber.jsp頁面上,用戶輸入自己的猜測(cè),并提交給HandleGuess類負(fù)責(zé)創(chuàng)建。
%@ page language="java" import="java.util.*" pageEncoding="utf-8"
contentType="text/html;Charset=utf-8"%>
html>
head>
/head>
body>
% session.setAttribute("message", "請(qǐng)您猜數(shù)");
// HttpSession session =request.getSession(true);
int randomNumber=(int)(Math.random()*100)+1;//獲取一個(gè)隨機(jī)數(shù)
session.setAttribute("saveNumber",new Integer(randomNumber));
%>
p>訪問或刷新該頁面可以隨機(jī)跌倒一個(gè)1,到100之間的數(shù)字
br>單擊下面鏈接可以訪問去猜數(shù)字
a href="inputNumber.jsp" rel="external nofollow" >去猜數(shù)字/a>
/body>
/html>
step3,該servlet類為:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class HandleGuess extends HttpServlet {
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
PrintWriter out=response.getWriter();
//獲取客戶猜測(cè)提交的數(shù)
int guessNumber=Integer.parseInt(request.getParameter("guessnumber"));
//獲取客戶的會(huì)話對(duì)象
HttpSession session=request.getSession();
Integer integer=(Integer)session.getAttribute("saveNumber");
int realNumber=integer.intValue();
System.out.println(realNumber);
System.out.println(guessNumber);
if(guessNumber>realNumber){
session.setAttribute("message", "您猜大了");
System.out.println("您猜大了---no");
response.sendRedirect("inputNumber.jsp");
}
else if(guessNumberrealNumber){
session.setAttribute("message", "您猜小了");
System.out.println("您猜小了---no");
response.sendRedirect("inputNumber.jsp");
}
else{
session.setAttribute("message", "您猜對(duì)了");
System.out.println("您猜對(duì)了");
response.sendRedirect("inputNumber.jsp");
}
}
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException{
doPost(request,response);
}
}
step4,web.xml配置,省略。
以上就是本文的全部內(nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
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