web开发经验交流
我才开始学jsp 现在把mvc搞懂了，基本上能用model2开发了，但是不知道我运用的不好还是怎么回事，想来想去感觉servlet就能起到一个验证的作用，比如验证用户登录时候的信息是否正确，还有其他的验证功能。除了验证我实在不知道servlet还有别的什么功能！在jsp页面的里，还得jsp自己调用model，显示一些信息。让人感觉jsp页面里面还有很多java代码，看着很不舒服哎 比如如下的代码
各位给提点建议吧
<%@ page language="java" import="java.util.*,board.wl.com.*,java.sql.*,title.wl.com.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'title.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<style type="text/css">
<!--
a:link {font-family:"宋体";text-decoration:none}
a:visited {font-family:"宋体";text-decoration:none}
a:hover {font-family:"宋体";text-decoration:none}
-->
</style>
</head>
<body>
<body>
<%
String user=(String)session.getAttribute("user");
String ii=request.getParameter("BoardId");
int i=Integer.parseInt(ii);
i=i+1;
%>
<center>
<table width="1043" border="0">
<tr>
<td width="143"><div id="my" align="center"><a href="#">技术论坛首页</a></div></td>
<td width="100"><div align="center"><a href="#">资讯</a></div></td>
<td width="100"><div align="center"><a href="#">论坛</a></div></td>
<td width="100"><div align="center"><a href="#">博客</a></div></td>
<td width="100"><div align="center"><a href="#">下载</a></div></td>
<td width="100"><div align="center"><a href="#">搜索</a></div></td>
<td width="100"><div align="center"><a href="#">更多</a></div></td>
<td width="100"><div align="center">欢迎</div></td>
<td width="100"><div align="center"><%=user %></div></td>
<td width="100"><div align="center"><a href="loginout.jsp">退出</a></div></td>
</tr>
<% int pageNow;
String s_pageNow=request.getParameter("pageNow");
if(s_pageNow==null){
pageNow=1;
}else{
pageNow=Integer.parseInt(s_pageNow);
}
Boardinfo bi=new Boardinfo();
ArrayList al=bi.getBoard();
BoardBean bb=(BoardBean)al.get(i);
Title tt=new Title();
Connection ct=null;
Statement st=null;
ResultSet rs=null;
int pageSize=4;
int rowCount=tt.getCountById(i);
int pageCount=tt.getPageCount(pageSize,rowCount);
%>
<tr>
<td height="37" colspan="7" align="center"><%=bb.getBoardname() %></td>
</tr>
<tr><td height="32" colspan="2" align="center">题目</td><td height="32" colspan="2" align="center">作者</td><td height="32" colspan="2" align="center">浏览次数</td><td height="32" colspan="2" align="center">回复数</td></tr>
<%
try{ rs=tt.getTitle(pageNow,i);
while(rs.next()){
%><tr>
<td height="66" colspan="3" ><a href="#"><%=rs.getString("Title") %></a></td><td height="66"colspan="2" ><%=rs.getString("Author") %></td><td height="66"colspan="2" ><%=rs.getInt("ReadCount") %></td><td height="66"colspan="2"><%=rs.getInt("ReCount") %></td>
</tr>
<%
}
}catch (Exception e){
e.printStackTrace();
}finally{
tt.close();
}%>
</table>
<%
if (pageNow==1){
//页码只显示两个，表现在a<=pageNow+1；
for (int a=pageNow;a<=pageNow+1;a++){
//if(pageNow!=pageCount)
//{
out.print("<a href=title.jsp?pageNow="+a+"&BoardId="+(i-1)+">["+a+"]</a>");
//}
}
out.print("<a href=title.jsp?pageNow="+(pageNow+1)+"&BoardId="+(i-1)+">下一页</a>");
}else if(pageNow!=1&&pageNow!=pageCount){
out.print("<a href=title.jsp?pageNow="+(pageNow-1)+"&BoardId="+(i-1)+">上一页</a>");
for (int a=pageNow;a<=pageNow+1;a++){
out.print("<a href=title.jsp?pageNow="+a+"&BoardId="+(i-1)+">["+a+"]</a>");
}
out.print("<a href=title.jsp?pageNow="+(pageNow+1)+"&BoardId="+(i-1)+">下一页</a>");
}else{
out.print("<a href=title.jsp?pageNow="+(pageNow-1)+"&BoardId="+(i-1)+">上一页</a>");
out.print("<a href=title.jsp?pageNow="+pageCount+"&BoardId="+(i-1)+">["+pageCount+"]</a>");
}
%>
</body>
</html>
[解决办法]
servlet还可以写过滤器、图片验证码等，功能丰富啊！对于简单的小系统没必要用mvc来实现，servlet就行了，干嘛搞得那么复杂！关于页面中的代码建议你看下El表达式、JSTL表达式和Struts标签。这些标签可以实现页面基本没java代码。
