jsp正确使用session完成猜数游戏(完整版!!! 优化版!!!)

游戏要求:

 

 

 

 

 

 

代码实现:

c1_caishu_.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    
    请输入一个1~20的整数进行猜数!
<%
    int num = (int)Math.random()*20+1;
    session.setAttribute("count", new Integer(0));//猜数的次数
    session.setAttribute("randomNum", new Integer(num));//产生的随机数
%>

<form action="c1_caishu_judge.jsp" method="post">
        <input type="text" name="guess">
        <input type="submit" name="tijiao" value="提交">
</form>

</body>
</html>

c1_caishu_judge.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<%
    String str = request.getParameter("guess");//request.getParameter返回的是String类型
    if(str==null && str.length()==0){
        response.sendRedirect("c1_caishu_.jsp");
    }else{
        int userGuessNum = Integer.parseInt(str);//用户猜的数
        session.setAttribute("guessNum", new Integer(userGuessNum));
        Integer randomNum = (Integer)session.getAttribute("randomNum");//生成的随机数
        
        if(userGuessNum == randomNum.intValue()){//猜对了
            int n = ((Integer)session.getAttribute("count")).intValue();//猜数的次数
            n++;
            session.setAttribute("count", new Integer(n));
            response.sendRedirect("c1_caishu_success.jsp");
        }else if(userGuessNum > randomNum.intValue()){//猜大了
            int n = ((Integer)session.getAttribute("count")).intValue();//猜数的次数
            n++;
            session.setAttribute("count", new Integer(n));
            response.sendRedirect("c1_caishu_large.jsp");
        }else{    //猜小了
            int n = ((Integer)session.getAttribute("count")).intValue();//猜数的次数
            n++;
            session.setAttribute("count", new Integer(n));
            response.sendRedirect("c1_caishu_small.jsp");
        }
    }
%>

</body>
</html>

c1_caishu_large.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<%
    int guessNum = Integer.parseInt(session.getAttribute("guessNum").toString());//用户猜的数
%>

<%=guessNum %>数大了,请再猜:

<form action="c1_caishu_judge.jsp" method="post">
        <input type="text" name="guess">
        <input type="submit" name="tijiao" value="送出">
</form>

</body>
</html>

c1_caishu_small.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<%
    Integer guessNum = (Integer)session.getAttribute("guessNum");//用户猜的数
%>

<%=guessNum %>数小了,请再猜:

<form action="c1_caishu_judge.jsp" method="post">
        <input type="text" name="guess">
        <input type="submit" name="tijiao" value="送出">
</form>

</body>
</html>

c1_caishu_success.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<%
    Integer guessNum = (Integer)session.getAttribute("guessNum");//用户猜的数
    Integer count = (Integer)session.getAttribute("count");//用户猜的次数
%>

恭喜你猜对了!!!<br><br>
你猜的数为:<%=guessNum %><br><br>
你一共猜了<%=count %>次<br><br>
再来猜一次? <a href="c1_caishu_.jsp">好</a>


</body>
</html>

 

posted @ 2021-06-30 16:14  ananoi  阅读(416)  评论(0)    收藏  举报