jsp留言板源代码三: 给jsp初学者.

时间：2021-05-26

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

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> \n"+
"  \n"+
" </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%\"><FONT "+
" color=#ffffff>留言主题</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=50><FONT "+
" color=#ffffff>回应数</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=40><FONT "+
" color=#ffffff>点击数</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=100><FONT "+
" color=#ffffff>作者名</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=140><FONT "+
" color=#ffffff>发表/回应时间</FONT></TD></TR> ";
//out.print(st);

if(count > 0 )
{
ResultSet rs = testInq.executeQuery(inqsql);
ResultSetMetaData metaData = rs.getMetaData();

int i;
// 跳过pages -1 页,使cursor指向pages并准备显示
for(i=1;i<=(pages - 1)*pagesize;i++) rs.next();
//显示第pages页开始
st= " <CENTER> <TABLE border=0 cellSpacing=1 width=\"95%\"
> <TBODY> ";
out.print(st);
String linestr="";
for(i=1;i<=pagesize;i++)
if(rs.next())
{
lw_title=rs.getString("lw_title");
lw_author=rs.getString("lw_author");
lw_time=rs.getString("lw_time");
lw_content=rs.getString("lw_content");
author_ip=rs.getString("author_ip");
author_email=rs.getString("author_email");
st=lw_time.substring(0,4)+"-"+lw_time.substring(4,6)+"-"
+lw_time.substring(6,8)+":"+
lw_time.substring(8,10)+":"+lw_time.substring(10,12)+
":"+lw_time.substring(12,14);
try{lw_content=testInq.addBr(testInq.removeComment(lw_co
ntent));} catch (Exception e) {}
linestr =""+
" <TR bgColor=#bed9fc> "+
" <TD align=left width=\"75%\"><FONT "+
" color=#0000cd>留言主题:</FONT><STRONG>"
+lw_title+"</STRONG></TD> "+
" <TD align=left width=\"25%\"><FONT color=
#0000cd>留言时间:</FONT>"+st+"</TD></TR> "+
" <TR bgColor=#e7f1fe> "+
" <TD colSpan=2 "+
" width=\"700\" wrap=yes><BR>"+lw_content+"
<BR><br></TD></TR> "+
" <TR bgColor=#bed9fc> "+
" <TD align=right colSpan=2 width=\"100%\">
<FONT "+
" color=#0000cd>作者:</FONT>"+lw_author+"
<FONT "+
" color=#0000cd>来源:</FONT>"+author_ip+"
</TD></TR>";
out.println(linestr);

}
rs.close();
//显示第pages页结束
st= " </TBODY></TABLE></CENTER></DIV><BR> "+

" <CENTER><A "+
" href=\"guestbook.jsp\"><FONT "+
" color=blue face=楷体_GB2312 size=4>返回留言板
首页</FONT></A></CENTER><BR> "+
" <HR align=center noShade SIZE=1 width=\"95%\"
> ";

out.print(st);

int iFirst=1,iLast=totalpages,iPre,iNext;
if(pages<=1) iPre=1;
else iPre=pages - 1;

if(pages>=totalpages) iNext=totalpages;
else iNext=pages + 1;

int n=(int)(count/pagesize);
if(n*pagesize<count) n++;
if(n>1)
{
//for(i=1;i<=n;i++) out.print("<a href=inquire.jsp?pages=
"+i+">"+i+" </a>");
//out.print("<HR align=center noShade SIZE=1 width=\"95%\
">");
String lt1="返回主页",lt2="第一页",lt3="上一页",lt4="下一
页",lt5="最后一页",lt6="";
lt6="<a href=http:// (皮蛋) 2000.12.10

jsp留言板源代码三: 给jsp初学者.

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