JSP实现成语接龙

首页：

<%--
  Created by IntelliJ IDEA.
  User: zdd
  Date: 2019/11/18
  Time: 10:15
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>成语接龙首页</title>
</head>
<body>
四字成语接龙<br>
你输入的成语为：
<%
    String s = (String)application.getAttribute("message");
    if(s!=null){
        out.println(s);
    }else{
        out.println("还没有成语，请输入：<br>");
    }
%>
<form action="jielong.jsp" method="post">
    <br>
    输入成语：<input type="text" name="mess"/><br>
    <input type="submit" value="提交"/>
</form>
</body>
</html>

处理页面

<%--
  Created by IntelliJ IDEA.
  User: zdd
  Date: 2019/11/18
  Time: 10:21
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>jielong.jsp</title>
</head>
<body>
<%!
    String message = "";
    ServletContext application;
    synchronized void sendmessage(String s){
        application= getServletContext();
        message = message+s+"--->";
        application.setAttribute("message",message);
    }
%>
<%
    request.setCharacterEncoding("UTF-8");
    String content = request.getParameter("mess");
    sendmessage(content);
    out.println("你的成语"+content+"已经提交");
    response.setHeader("refresh","3;chengyu.jsp");
%>

</body>
</html>

运行结果：