为什么userLogin.htm文件将表单传给try_2.jsp文件后,第一个客户的姓名会被第二个客户姓名覆盖。
userLogin.htm文件:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>首页</title>
</head>
<body>
<center>
<form action="try_2.jsp" method="get" name="userForm">
<h1>欢迎光临本站!</h1>
<p>请输入用户名:<input name="username" type="text" id="username" size="20" maxlength="20"></p>
<p><input name="Submit" type="submit" value="确定"></p>
</form>
</center>
</body>
</html>try_2.jsp文件:
<%@ page contentType="text/html; charset=gbk" import="java.util.*" %>
<%!
class User
{
private String userName;
private GregorianCalendar loginTime;
User(GregorianCalendar loginTime ,String UserName)
{
setUserTime(loginTime);
setUserName(UserName);
}
void setUserTime(GregorianCalendar loginTime )
{
this.loginTime=loginTime;
}
void setUserName(String userName)
{
this.userName=userName.trim();
}
String getUserName()
{
return userName;
}
String getLoginTime()
{
int year=loginTime.get(loginTime.YEAR);
int month=loginTime.get(Calendar.MONTH);
int day=loginTime.get(Calendar.DATE);
int hour=loginTime.get(Calendar.HOUR);
int minute=loginTime.get(Calendar.MINUTE);
int second=loginTime.get(Calendar.SECOND);
String s=year+"年"+month+"月"+day+"日"+hour+"时"+minute+"分"+second+"秒"+'a';
return s;
}
}
class userList extends Vector
{
userList()
{
super(1,1);
}
void addUser(User ue)
{
addElement(ue);
}
} userList userlist=new userList();
%>
<html>
<body>
<center>
<%
String userName=request.getParameter("username");
GregorianCalendar gc=new GregorianCalendar();
User user=new User(gc,userName);
userlist.addUser(user);
Enumeration e=userlist.elements();
out.print("<table border=1>");
out.print("<tr>");
out.print("<th>"+"名字");
out.print("<th>"+"时间");
out.print("</tr>");
while(e.hasMoreElements())
{
User user_1 = (User)e.nextElement();
out.print("<tr>");
out.print("<td>"+user_1.getUserName());
out.print("<td>"+user_1.getLoginTime());
out.print("</tr>");}
out.print("</table>");
%>
</body>
</html>
userLogin.htm文件:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>首页</title>
</head>
<body>
<center>
<form action="try_2.jsp" method="get" name="userForm">
<h1>欢迎光临本站!</h1>
<p>请输入用户名:<input name="username" type="text" id="username" size="20" maxlength="20"></p>
<p><input name="Submit" type="submit" value="确定"></p>
</form>
</center>
</body>
</html>try_2.jsp文件:
<%@ page contentType="text/html; charset=gbk" import="java.util.*" %>
<%!
class User
{
private String userName;
private GregorianCalendar loginTime;
User(GregorianCalendar loginTime ,String UserName)
{
setUserTime(loginTime);
setUserName(UserName);
}
void setUserTime(GregorianCalendar loginTime )
{
this.loginTime=loginTime;
}
void setUserName(String userName)
{
this.userName=userName.trim();
}
String getUserName()
{
return userName;
}
String getLoginTime()
{
int year=loginTime.get(loginTime.YEAR);
int month=loginTime.get(Calendar.MONTH);
int day=loginTime.get(Calendar.DATE);
int hour=loginTime.get(Calendar.HOUR);
int minute=loginTime.get(Calendar.MINUTE);
int second=loginTime.get(Calendar.SECOND);
String s=year+"年"+month+"月"+day+"日"+hour+"时"+minute+"分"+second+"秒"+'a';
return s;
}
}
class userList extends Vector
{
userList()
{
super(1,1);
}
void addUser(User ue)
{
addElement(ue);
}
} userList userlist=new userList();
%>
<html>
<body>
<center>
<%
String userName=request.getParameter("username");
GregorianCalendar gc=new GregorianCalendar();
User user=new User(gc,userName);
userlist.addUser(user);
Enumeration e=userlist.elements();
out.print("<table border=1>");
out.print("<tr>");
out.print("<th>"+"名字");
out.print("<th>"+"时间");
out.print("</tr>");
while(e.hasMoreElements())
{
User user_1 = (User)e.nextElement();
out.print("<tr>");
out.print("<td>"+user_1.getUserName());
out.print("<td>"+user_1.getLoginTime());
out.print("</tr>");}
out.print("</table>");
%>
</body>
</html>
解决方案 »
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