jsp+servlet实现猜数字游戏

jsp+servlet实现猜数字游戏主要用到了servlet方面的session,HttpServletResponse类中的sendRedirect()方法。

step1,客户访问或刷新getNumber.jsp页面时,随机给用户分配一个1-100之间的数字,将该数字存放到客户的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="重新得到新的随机数">

</form>

</body>

</html>

step2,然后用户超廉价到inputNumber.jsp页面上,用户输入自己的猜测,并提交给HandleGuess类负责创建。

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"

contentType="text/html;Charset=utf-8"%>

<html>

<head>

</head>

<body>

<% session.setAttribute("message", "请您猜数");

// HttpSession session =request.getSession(true);

int randomNumber=(int)(Math.random()*100)+1;//获取一个随机数

session.setAttribute("saveNumber",new Integer(randomNumber));

%>

<p>访问或刷新该页面可以随机跌倒一个1,到100之间的数字

<br>单击下面链接可以访问去猜数字

<a href="inputNumber.jsp" rel="external nofollow" >去猜数字</a>

</body>

</html>

step3,该servlet类为:

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();

//获取客户猜测提交的数

int guessNumber=Integer.parseInt(request.getParameter("guessnumber"));

//获取客户的会话对象

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(guessNumber<realNumber){

session.setAttribute("message", "您猜小了");

System.out.println("您猜小了---no");

response.sendRedirect("inputNumber.jsp");

}

else{

session.setAttribute("message", "您猜对了");

System.out.println("您猜对了");

response.sendRedirect("inputNumber.jsp");

}

}

public void doGet(HttpServletRequest request,HttpServletResponse response)

throws ServletException,IOException{

doPost(request,response);

}

}

step4,web.xml配置,省略。

以上是 jsp+servlet实现猜数字游戏 的全部内容, 来源链接: utcz.com/z/349497.html

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