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jsp正確使用session完成猜數遊戲(完整版!!! 優化版!!!) - 動態 詳情

遊戲要求:

image.png
image.png
image.png

代碼實現:

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>
    
    請輸入一個1~20的整數進行猜數!
<%
    int num = (int)Math.random()*20+1;
    session.setAttribute("count", new Integer(0));//猜數的次數
    session.setAttribute("randomNum", new Integer(num));//產生的隨機數
%>

<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類型
    if(str==null && str.length()==0){
        response.sendRedirect("c1_caishu_.jsp");
    }else{
        int userGuessNum = Integer.parseInt(str);//用户猜的數
        session.setAttribute("guessNum", new Integer(userGuessNum));
        Integer randomNum = (Integer)session.getAttribute("randomNum");//生成的隨機數
        
        if(userGuessNum == randomNum.intValue()){//猜對了
            int n = ((Integer)session.getAttribute("count")).intValue();//猜數的次數
            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();//猜數的次數
            n++;
            session.setAttribute("count", new Integer(n));
            response.sendRedirect("c1_caishu_large.jsp");
        }else{    //猜小了
            int n = ((Integer)session.getAttribute("count")).intValue();//猜數的次數
            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());//用户猜的數
%>

<%=guessNum %>數大了,請再猜:

<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");//用户猜的數
%>

<%=guessNum %>數小了,請再猜:

<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");//用户猜的數
    Integer count = (Integer)session.getAttribute("count");//用户猜的次數
%>

恭喜你猜對了!!!<br><br>
你猜的數為:<%=guessNum %><br><br>
你一共猜了<%=count %>次<br><br>
再來猜一次? <a href="c1_caishu_.jsp">好</a>


</body>
</html>
jsp
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