inputMessage.jsp:
<%@ page language="java" import="java.text.*,java.util.*"
contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style>
#form2 input {
color: rebeccapurple;
font-weight: bold;
}
</style>
</head>
<body bgcolor="#f0ffff">
<form action="checkMessage.jsp" method="post">
请输入姓名： <input type="text" name="name" /><br>
请输入标题： <input type="text" name="title" /><br>
请输入内容：<textarea cols="40" rows="10" name="message"></textarea>
<br> <br> <br>
<input type="submit" value="留言" />
</form>
<br>
<form id="form2" action="showMessage.jsp" method="post">
<input type="submit" value="查看留言板" />
</form>
</body>
</html>
checkMessage.jsp:
<%@ page language="java" import="java.text.*,java.util.*"
contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body bgcolor="#abcdef">
<%!Vector<String> v = new Vector<String>();
int i = 0;%>
<%
String datetime = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(Calendar.getInstance().getTime()); //获取系统时间
%>
<%
request.setCharacterEncoding("utf-8");
String name = request.getParameter("name");
String title = request.getParameter("title");
String message = request.getParameter("message");
%>
<%
if (name == null || "".equals(name.trim())) {
//trim()主要解决里面只有空格的问题
name = " 网友" + (int) (Math.random() * 100000 + 10000);
}
if (title == null || "".equals(title.trim())) {
title = " 无";
}
if (message == null || "".equals(message.trim())) {
message = " 无";
}
%>
<%
i++;
String str = "第" + + i + "楼 <br> "
+ "留言人: " + name + "<br>"
+ "标题: " + title + "<br>"
+ "内容: " + message + "<br>"
+ "时间: " + datetime + ".<hr>";
v.add(str);
application.setAttribute("message", v);
%>
留言成功.
<a href="inputMessage.jsp">返回留言板</a>
</body>
</html>
showMessage.jsp:
<%@ page language="java" import="java.util.*"
contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<div>
<%
Object o = application.getAttribute("message");
if (o == null) {
out.print("暂时还没有留言,请留言！");
} else {
Vector<String> v = (Vector<String>) o;
for (int i = v.size() - 1; i >= 0; i--) {
StringTokenizer st = new StringTokenizer(v.get(i), ".");
while (st.hasMoreElements()) {
out.print(st.nextToken() + "<br>");
}
}
}
%>
</div>
</body>
</html>
结果展示：
