版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/ffgcc/article/details/83024074
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%
String temp = new String();
temp = (String) application.getAttribute("num");
if (temp == null) {
application.setAttribute("num", "0");
}
%>
<!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>
p1{
color:red;
}
</style>
</head>
<script type="text/javascript">
function checkuser(){
var ch=true;
var t1=document.getElementById("user").value;
if(t1=="")
{
alert("用户名为空");
ch=false;
}
return ch ;
}
function check(){
if(checkuser())
return true ;
else
return false;
}
</script>
<body>
<form id="form" method="get" action="NewFile1.jsp" onsubmit="return check()" >
<table >
<tr>
<td align="right"> 用户:</td>
<td> <input type="text" name="user" id="user" onchange="checkuser()" style="width:170px;"/></td>
</tr>
<tr>
<td align="right"> 留言:</td>
<td> <input type="test" id="liuyan" name="liuyan" style="width:170px;"/></td>
</tr>
<tr>
<td colspan="2" >
<input type="submit" name="bt1" value="提交"/>
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ 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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%request.setCharacterEncoding("utf-8"); %>
<%
int n;
String temp1 = new String();
String temp2 = new String();
String temp3 = new String();
String temp =new String();
temp1 = request.getParameter("user");
temp2 = request.getParameter("liuyan");
temp3 =request.getRemoteAddr();
temp = (String)application.getAttribute("num");
n = Integer.parseInt(temp);
n = n + 1;
temp = temp.valueOf(n);
application.setAttribute("num", temp);
application.setAttribute("xingming" + temp, temp1);
application.setAttribute("liuyan" + temp, temp2);
application.setAttribute("ip"+temp,temp3);
%>
<%
int i;
for (i = 1; i <= n; i++) {
temp = temp.valueOf(i);
temp1 = (String) application.getAttribute("xingming" + temp);
temp2 = (String) application.getAttribute("liuyan" + temp);
temp3 =(String) application.getAttribute("ip" + temp);
%>
<tr>
<td bgcolor="#CCFFCC" height="27"><b><%=temp1%>@<%=temp3%>说:
<%=temp2%></b></td></br>
</tr>
<%
}
%>
</body>
</html>