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jsp留言板源代码三: 给jsp初学者.

作者：采集员文章来源：来源于网络点击数：更新时间：2005/9/10 14:26:41

作者: precom (皮蛋) 2000.12.10
reply.jsp
====================================
<html><head>
<META content="text/html; charset=gb2312 " http-equiv=Content-Type>

<title>张家界电话黄页(网上114)</title></head>
<style type="text/css">

</style>

<body>

<%@ page contentType="text/html; charset=GB2312" %>
<%@ page language="java" import="java.sql.*" %>
<jsp:useBean id="testInq" scope="page" class="ymbean.opDb" />
<%
int pages=1;
int pagesize=10;
int count=0;
int totalpages=0;

String countsql="",inqsql="",updatesql="",lwhere="",insertsql="",st=
"";

String lw_title="",lw_author="",pagetitle="",author_http="",author_e
mail="",lw_ico="0",
lw_content="",lw_class1="";
String author_ip="",lw_time="",lw_class2="",lw_type="",zt_time="",zt
_author="";
int answer_num=0,click_num=0;
int inquire_item=1;
String inquire_itemt="",inquire_value="";
String lurlt="<a href=reply.jsp?";

lwhere=" where "; //只显示主贴

/*
Enumeration e = request.getParameterNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
*/
try{
//取显示的页页序数
pages = new Integer(request.getParameter("pages")).intValue();
} catch (Exception e) {}
try{
//取查询参数
lw_class1=new String(request.getParameter("lw_class1").getBytes
("ISO8859_1"));
lw_class2=new String(request.getParameter("lw_class2").getBytes
("ISO8859_1"));
zt_time=new String(request.getParameter("zt_time").getBytes("IS
O8859_1"));
zt_author=new String(request.getParameter("zt_author").getBytes
("ISO8859_1"));

lwhere=" where ( lw_class1='"+lw_class1+"' and lw_class2='"+lw_
class2+
"' and (lw_time='"+ zt_time+"' or zt_time='"+zt_time+
"') and (author_email='"+zt_author+"' or zt_author='"+zt
_author+"') ) ";
lurlt=lurlt+"lw_class1="+lw_class1+"&lw_class2="+lw_class2+"&zt
_time="+zt_time+
"&zt_author="+zt_author+"&";
//out.print(lwhere);
} catch (Exception e) { //out.print("error1: "+e+"<hr>");
}

try{
//取得参数留言内容
lw_class1=new String(request.getParameter("lw_class1").getBytes("ISO
8859_1"));
lw_class2=new String(request.getParameter("lw_class2").getBytes("ISO
8859_1"));
lw_title=new String(request.getParameter("lw_title").getBytes("ISO88
59_1"));
lw_author=new String(request.getParameter("lw_author").getBytes("ISO
8859_1"));
pagetitle=new String(request.getParameter("pagetitle").getBytes("ISO
8859_1"));
author_http=new String(request.getParameter("author_http").getBytes(
"ISO8859_1"));
author_email=new String(request.getParameter("author_email").getByte
s("ISO8859_1"));
zt_time=new String(request.getParameter("zt_time").getBytes("ISO8859
_1"));
zt_author=new String(request.getParameter("zt_author").getBytes("ISO
8859_1"));
lw_ico=request.getParameter("gifface");

} catch (Exception e) {}

try{
lw_content=new String(request.getParameter("lw_content").getBytes("I
SO8859_1"));
String requestMethod=request.getMethod();
requestMethod=requestMethod.toUpperCase();
if(requestMethod.indexOf("POST")<0)
{ out.print("非法操作!");
return;
}

//形成其他数据项
author_ip=request.getRemoteAddr() ;
lw_time=testInq.getCurrentDate("yyyyMMddHHmmss");
lw_type=""+"c"; //从贴
answer_num=0;
click_num=0;
//================
st="','";
//保证留言所有数据项的长度在正常范围内
if(lw_title.length()>50) lw_title=lw_title.substring(0,50);
if(lw_author.length()>20) lw_author=lw_author.substring(0,20);
if(author_http.length()>40) author_http=author_http.substring(0,40);

if(author_email.length()>50) author_email=author_email.substring(0,4
0);
if(zt_author.length()>50) zt_author=zt_author.substring(0,40);
if(lw_content.length()>4000) lw_content=lw_content.substring(0,4000)
;

insertsql="insert into guestbook values('"+lw_title+st+lw_author+st+
author_http+st+
author_email+st+lw_ico+st+lw_time+"',"+answer_num+","+cli
ck_num+",'"+
author_ip+st+lw_class1+st+lw_class2+st+lw_type+st+zt_time
+st+zt_author+st+
lw_content+"')";
//out.print(insertsql);
//插入留言
try{
st=testInq.executeUpdate(insertsql);
if(st.indexOf("executeUpdate ok")<0)
out.print("msg="+st);
else
{
updatesql="update guestbook set answer_num=answer_num + 1 "+l
where;
//增加回复人数统计
try{
st=testInq.executeUpdate(updatesql);
if(st.indexOf("executeUpdate ok")<0)
out.print("msg="+st);
}catch (Exception e) { }
}
}catch (Exception e) { out.print("留言出错:"+e);}
} catch (Exception e) {}
%>

<%
//验证留言输入项合法性的javascript
String ljs=" <SCRIPT language=JavaScript> "+
"  "+
" </SCRIPT> ";
out.print(ljs);
%>

<%
//显示最近时间发表的一页留言
countsql="select count(lw_title) from guestbook "+lwhere;
inqsql ="select lw_title,lw_author,lw_time,lw_content,author_ip, "+
" author_email from guestbook "+lwhere+" order by lw_time desc
" ;
updatesql="update guestbook set click_num=click_num + 1 "+lwhere;

//增加浏览人数统计
try{
st=testInq.executeUpdate(updatesql);
if(st.indexOf("executeUpdate ok")<0)
out.print("msg="+st);
}catch (Exception e) { }

//out.print(inqsql);
if(pages>0)
{
try {
try{
ResultSet rcount=testInq.executeQuery(countsql);
if(rcount.next())
{
count = rcount.getInt(1);
}
rcount.close();
} catch (Exception el1) { out.println("count record error
: "+el1+"<br>" );
out.println(countsql);
}

totalpages=(int)(count/pagesize);
if(count>totalpages*pagesize) totalpages++;
st=""+
" <TABLE align=center border=0 cellPadding=0 cellSpacing=
0 width="95%"> "+
" <TBODY> <TR> <TD align=middle bgColor=#97badd width="1
00%"><FONT color=#ff0000>"+
" 共 "+totalpages+" 页，"+count+"
条. "+" 当前页: "+pages+
" </FONT></TD></TR></TBODY></TABLE><BR> ";

out.print(st);

//out.print(" 共 "+totalpages+" 页，"+
count+" 条. "+" 当前页: "+pages+"<br>");

st=" <center> "+
" <TABLE border=0 cellPadding=2 cellSpacing=1 width="95%"> "+
" <TBODY> "+
" <TR> "+
" <TD align=middle bgColor=#6699cc width="55%"><

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