谁能帮我看看错在什么地方,程序如下:
<%@ page contentType="text/html; charset=gb2312" import="java.util.*" %>
<%!
class User
{
private String name;
private GregorianCalendar loginTime;
User(String name,GregorianCalendar loginTime)
{
setName(name);
setLoginTime(loginTime);
}
void setName(String name)
{
this.name=name;
}
String getName()
{
return name;
}
void setLoginTime(GregorianCalendar loginTime)
{
this.loginTime=loginTime;
}
String getLoginTime()
{
int year=loginTime.get(Calendar.YEAR);
int month=loginTime.get(Calendar.MONTH)+1;
int day=loginTime.get(Calendar.DATE);
String am_pm=(loginTime.get(Calendar.AM_PM)==0?"上午":"下午");
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"+am_pm+hour+"时"+minute+"分"+second+"秒";
return s;
}
} class UserList extends Vector{
UserList(){
super(1,1);
}
void addUser(String name,GregorianCalendar loginTime){
User user=new User(name,loginTime);
add(user);
}
User[] getUserList(){
int num=size();
User[] userAry=new User[num];
for(int i=0;i<num;i++)
userAry[i]=(User)elementAt(i);
return userAry;
}
}
UserList userList=new UserList(); int count=0;
synchronized int incCount(){
return ++count;
}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>登录</title>
</head>
<body>
<center>
<%
String userName=request.getParameter("username");
if(userName.equals(null)||userName.trim().length()==0){
%>
<p>用户名不能为空,请重新输入!</p>
<p><a href="userLogin.htm" target="_self">如果浏览器没有跳转,请点击这里</a></p>
<meta http-equiv="Refresh" content="5;URL=userLogin.htm">
<%
}
else{
userName=new String(userName.getBytes("ISO-8859-1"),"gb2312");
GregorianCalendar loginTime=new GregorianCalendar();
userList.addUser(userName,loginTime);
User[] userAry=userList.getUserList();
%>
<h1><%= "Hello! "+userName %></h1>
<p><%= "您是第 "+incCount()+" 个光临本站的人" %></p>
<p>访问过本站的用户有:</p>
<table border="1" cellspacing="1" cellpadding="5" bordercolor="#9966CC" bgcolor="#E1E1FF">
<tr>
<td align="center" valign="middle">用户名</td>
<td align="center" valign="middle">访问时间</td>
</tr>
<%
for(int i=userAry.length-1;i>=0;i--){
%>
<tr>
<td align="center" valign="middle"><%= userAry[i].getName() %></td>
<td align="center" valign="middle"><%= userAry[i].getLoginTime() %></td>
</tr>
<%
}
%>
</table>
<%
}
%>
</center>
</body>
</html> 程序报错:
The server encountered an internal error () that prevented it from fulfilling this request。
<%@ page contentType="text/html; charset=gb2312" import="java.util.*" %>
<%!
class User
{
private String name;
private GregorianCalendar loginTime;
User(String name,GregorianCalendar loginTime)
{
setName(name);
setLoginTime(loginTime);
}
void setName(String name)
{
this.name=name;
}
String getName()
{
return name;
}
void setLoginTime(GregorianCalendar loginTime)
{
this.loginTime=loginTime;
}
String getLoginTime()
{
int year=loginTime.get(Calendar.YEAR);
int month=loginTime.get(Calendar.MONTH)+1;
int day=loginTime.get(Calendar.DATE);
String am_pm=(loginTime.get(Calendar.AM_PM)==0?"上午":"下午");
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"+am_pm+hour+"时"+minute+"分"+second+"秒";
return s;
}
} class UserList extends Vector{
UserList(){
super(1,1);
}
void addUser(String name,GregorianCalendar loginTime){
User user=new User(name,loginTime);
add(user);
}
User[] getUserList(){
int num=size();
User[] userAry=new User[num];
for(int i=0;i<num;i++)
userAry[i]=(User)elementAt(i);
return userAry;
}
}
UserList userList=new UserList(); int count=0;
synchronized int incCount(){
return ++count;
}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>登录</title>
</head>
<body>
<center>
<%
String userName=request.getParameter("username");
if(userName.equals(null)||userName.trim().length()==0){
%>
<p>用户名不能为空,请重新输入!</p>
<p><a href="userLogin.htm" target="_self">如果浏览器没有跳转,请点击这里</a></p>
<meta http-equiv="Refresh" content="5;URL=userLogin.htm">
<%
}
else{
userName=new String(userName.getBytes("ISO-8859-1"),"gb2312");
GregorianCalendar loginTime=new GregorianCalendar();
userList.addUser(userName,loginTime);
User[] userAry=userList.getUserList();
%>
<h1><%= "Hello! "+userName %></h1>
<p><%= "您是第 "+incCount()+" 个光临本站的人" %></p>
<p>访问过本站的用户有:</p>
<table border="1" cellspacing="1" cellpadding="5" bordercolor="#9966CC" bgcolor="#E1E1FF">
<tr>
<td align="center" valign="middle">用户名</td>
<td align="center" valign="middle">访问时间</td>
</tr>
<%
for(int i=userAry.length-1;i>=0;i--){
%>
<tr>
<td align="center" valign="middle"><%= userAry[i].getName() %></td>
<td align="center" valign="middle"><%= userAry[i].getLoginTime() %></td>
</tr>
<%
}
%>
</table>
<%
}
%>
</center>
</body>
</html> 程序报错:
The server encountered an internal error () that prevented it from fulfilling this request。
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货