jsp message board source code 2: for beginners of jsp.

Author: precom (Calm Egg) 2000.12.10

===========================
<html><head>
<META content="text/html; charset=gb2312 " http-equiv=Content-Type>

<title>Zhangjiajie Phone Yellow Pages (Online 114)</title></head>
<style type="text/css">

</style>

<body>

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

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

String lw_title="",lw_author="",pagetitle="",author_http="",author_e
mail="",lw_ico="",
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=?",llink="";

lwhere=" where lw_type='z' "; // Show only the main post

/*
Enumeration e = ();
while (()) {
String name = (String) ();
*/
try{
//Get the page number displayed
pages = new Integer(("pages")).intValue();
} catch (Exception e) {}
try{
//Get query parameters
inquire_item=new Integer(("range")).intValu
e();
inquire_value=new String(("findstr").getByt
es("ISO8859_1"));
if(inquire_item==0) inquire_itemt="lw_title";
else if(inquire_item==1) inquire_itemt="lw_content";
else if(inquire_item==2) inquire_itemt="lw_author";
else if(inquire_item==3) inquire_itemt="lw_time";
else if(inquire_item==4) inquire_itemt="lw_title";
lwhere=lwhere+" and "+inquire_itemt+" like '%"+inquire_value+"%
'";
lurlt=lurlt+"range="+inquire_item+"&findstr="+inquire_value+"&"

} catch (Exception e) {}

try{
//Get parameters Message content
lw_class1=new String(("gbname").getBytes("ISO885
9_1"));
lw_title=new String(("lw_title").getBytes("ISO88
59_1"));
lw_author=new String(("lw_author").getBytes("ISO
8859_1"));
pagetitle=new String(("pagetitle").getBytes("ISO
8859_1"));
author_http=new String(("author_http").getBytes(
"ISO8859_1"));
author_email=new String(("author_email").getByte
s("ISO8859_1"));
lw_ico=("gifface");
lw_content=new String(("lw_content").getBytes("I
SO8859_1"));
String requestMethod=();
requestMethod=();
if(("POST")<0)
{ ("Illegal operation!");
return;
}

//Form other data items
author_ip=() ;
lw_time=("yyyyMMddHHmmss");
lw_class2="2";
lw_type=""+"z"; //Main post
zt_time=lw_time;
zt_author=lw_author;
answer_num=0;
click_num=0;
//================
st="','";
// Ensure that the length of all data items in the message is within the normal range
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(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+"')";
//(insertsql);
//Insert message
try{
String lmsg=(insertsql);
if(("executeUpdate ok")<0)
("lmsg="+lmsg);

}catch (Exception e) { ("Error:"+e);}
} catch (Exception e) {}
%>

<%
//Javascript to verify the legality of the message input item
String ljs=" <SCRIPT language=JavaScript> \n"+
"  \n"+
" </SCRIPT> ";
(ljs);
%>

<%
//The first part of the message board interface
String ltop=" <DIV align=center> \n"+
" <CENTER> \n"+
" <FORM action= method=post name=frmsearch> \n"+
" <INPUT name=gbname type=hidden value=cnzjj_gt> \n"+
" <TABLE align=center border=0 cellSpacing=1 width=\"95%\"> \n"+
" <TBODY> \n"+
" <TR> \n"+
" <TD bgColor=#336699 colSpan=2 width=\"100%\"> \n"+
" <P align=center><FONT color=#ffffff face=KaiTi_GB2312 \n"+
" size=5>Welcome friends from afar to visit Zhangjiajie</FONT></P></TD></TR> \n"
+
" <TR bgColor=#6699cc> \n"+
" <TD align=left noWrap width=\"50%\">Home: <A \n"+
" href=\"\" target=_blank><FONT \n"+
" color=#ffffff>Zhangjiajie Tourism</FONT></A> Administrator: <A \n"
+
" href=\"mailto:dzx@\"><FONT color=#ffffff>
Yimin</FONT></A> \n"+
" >><A \n"+
" href=\" \"><FONT \n"+
" color=#ffffff>Management</FONT></A> >><A \n"+
" href=\" \"><FONT \n"+
" color=#ffffff>Apply</FONT></A> </TD> \n"+
" <TD align=right width=\"50%\"><SELECT class=ourfont name=range s
ize=1> \n"+
" <OPTION selected value=0>By topic</OPTION> <OPTION value=1>Press inside
Content</OPTION> \n"+
" <OPTION value=2>By Author</OPTION> <OPTION value=3>By Date</OPTI
ON> <OPTION \n"+
" value=4>By topic & content</OPTION></SELECT> <INPUT name=findst
r> <INPUT name=search onclick=\"return ValidSearch()\" type=submit val
ue=\"Search\"> \n"+
" </TD></TR></TBODY></TABLE></FORM> \n"+
" <HR align=center noShade SIZE=1 width=\"95%\"> \n"+
" </CENTER></div> ";
(ltop);
%>

<%
//Show a page of comments posted in the latest time
countsql="select count(lw_title) from guestbook "+lwhere;
inqsql ="select lw_title,answer_num,click_num,lw_author,lw_time,expres
sion,"+
" author_email,lw_class1,lw_class2 from guestbook "+lwhere+" o
rder by lw_time desc" ;

if(pages>0)
{
try {
try{
ResultSet rcount=(countsql);
if(())
{
count = (1);
}
();
} catch (Exception el1) { ("count record error
: "+el1+"<br>" );
(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>"+
"Total pages" in total, "+count"
. "+" Current page: "+pages+
" </FONT></TD></TR></TBODY></TABLE><BR> ";

(st);

//(" Total pages+" total, "+
count+" bar. "+" Current page: "+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>Message topic</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=50><FONT "+
" color=#ffffffff>Response Number</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=40><FONT "+
" color=#ffffff>Clicks</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=100><FONT "+
" color=#ffffff>Author name</FONT></TD> "+
" <TD align=middle bgColor=#6699cc width=140><FONT "+
" color=#ffffff>Posted/Response Time</FONT></TD></TR> ";
(st);

if(count > 0 )
{
ResultSet rs = (inqsql);
ResultSetMetaData metaData = ();

int i;
// Skip pages -1, make cursor point to pages and prepare to display
for(i=1;i<=(pages - 1)*pagesize;i++) ();
//Show pages page start
String linestr="";
for(i=1;i<=pagesize;i++)
if(())
{
lw_title=("lw_title");
answer_num=("answer_num");
click_num=("click_num");
lw_author=("lw_author");
lw_time=("lw_time");
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);
lw_ico=("expression");
author_email=("author_email");
lw_class1=("lw_class1");
lw_class2=("lw_class2");
llink="?lw_class1="+lw_class1+"&lw_class2="+lw_
class2+"&zt_time="+lw_time+
"&zt_author="+author_email;
linestr=" <TR bgColor=#d5e8fd> \n" +
" <TD bgColor=#d5e8fd><IMG src=\""+lw_ico+".gif\
"><A "+
" href=\""+llink+" \">"+lw_title+"</A></TD> "+
" <TD align=middle>["+answer_num+"]</TD>"+
" <TD align=middle>"+click_num+"</TD>"+
" <TD align=middle><A href=\"mailto:"+author_ema
il+"\">"+lw_author+"</A></TD>"+
" <TD align=middle>"+st+"</TD></TR>";

(linestr);

}
();
//Show the end of pages page
st="</TBODY></TABLE><BR>";
(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++) ("<a href=?pages=
"+i+">"+i+" </a>");
//("<HR align=center noShade SIZE=1 width=\"95%\
">");
String lt1="Return to homepage",lt2="First page",lt3="Previous page",lt4="Next
Page ",lt5="last page",lt6="";
lt6="<a href=>"+ lt1 + " </
a>"+
lurlt + "pages="+iFirst+"><FONT color=red>"+lt2+"&nbs
p; </a>"+
lurlt + "pages="+iPre+"><FONT color=red>"+lt3+"
</a>" +
lurlt + "pages="+iNext+"><FONT color=red>"+lt4+"
; </a>" +
lurlt + "pages="+iLast+"><FONT color=red>"+lt5+"
; </a>";
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>"+
lt6+
" </FONT></TD></TR></TBODY></TABLE><BR> ";

(st);

}

}
} catch (Exception e) { ("error: "+e); }
}

%>

<%
//The end of the message board interface
String lbottom="";
lbottom=lbottom+
" \n"+
" <FORM action= method=post name=sign> \n"+
" <INPUT name=gbname type=hidden value=cnzjj_gt> \n"+
" <INPUT name=pages type=hidden value=1> \n"+
" <TABLE bgColor=#d5e8fd border=0 cellSpacing=1 width=\"95%\"> \n"+

" <TBODY> \n"+
" <TR> \n"+
" <TD align=middle bgColor=#e6e6fa colSpan=2 noWrap><STRONG><FONT
color=blue \n"+
" face=KaiTi_GB2312 size=5>Send comments</FONT></STRONG> &nbs
p; [The contents added * must be filled in] </TD></TR> \n"+
" <TR> \n"+
" <TD noWrap width=\"45%\"> \n"+
" <DIV align=left> \n"+
" <TABLE bgColor=#d5e8fd border=0 cellSpacing=1 width=\"100%\">
\n"+
" <TBODY> \n"+
" <TR> \n"+
" <TD noWrap width=\"100%\">*Message topic: <INPUT maxLength=40 n
ame=lw_title \n"+
" size=36></TD></TR> \n"+
" <TR> \n"+
" <TD noWrap width=\"100%\">*Online name: <INPUT maxLength=18 n
ame=lw_author \n"+
" size=36></TD></TR> \n"+
" <TR> \n"+
" <TD noWrap width=\"100%\"> Home page title: <INPUT maxLength
=40 name=pagetitle \n"+
" size=36></TD></TR> \n"+
" <TR> \n"+
" <TD noWrap width=\"100%\"> Home page address: <INPUT maxLength
=255 name=author_http \n"+
" size=36></TD></TR> \n"+
" <TR> \n"+
" <TD noWrap width=\"100%\">*Email: <INPUT maxLength=40 n
ame=author_email \n"+
" size=36></TD></TR></TBODY></TABLE></DIV></TD> \n"+
" <TD noWrap vAlign=top width=\"55%\"> \n"+
" <DIV align=left> \n"+
" <TABLE bgColor=#b6d7fc border=0 cellSpacing=1 width=\"100%\">
\n"+
" <TBODY> \n"+
" <TR> \n"+
" <TD width=\"100%\">Please fill in your message below:</TD></TR> \n"+

" <TR> \n"+
" <TD width=\"100%\"><TEXTAREA cols=50 name=lw_content rows=
7></TEXTAREA></TD></TR></TBODY></TABLE></DIV></TD></TR> \n"+
" <TR> \n"+
" <TD bgColor=#fbf7ea colSpan=2 noWrap>Emoji\n"+
" <INPUT name=gifface type=radio value=1 checked><IMG \n"+
" alt=\" (152 bytes)\" height=15 src=\"\" width=15> <I
NPUT \n"+
" name=gifface type=radio value=2><IMG alt=\" (174 bytes)\"
height=15 \n"+
" src=\"\" width=15> <INPUT name=gifface type=radio value=3
><IMG \n"+
" alt=\" (147 bytes)\" height=15 src=\"\" width=15> <I
NPUT \n"+
" name=gifface type=radio value=4><IMG alt=\" (172 bytes)\"
height=15 \n"+
" src=\"\" width=15> <INPUT name=gifface type=radio value=5
><IMG \n"+
" alt=\" (118 bytes)\" height=15 src=\"\" width=15> <I
NPUT \n"+
" name=gifface type=radio value=6><IMG alt=\" (180 bytes)\"
height=15 \n"+
" src=\"\" width=15> <INPUT name=gifface type=radio value=7
><IMG \n"+
" alt=\" (180 bytes)\" height=15 src=\"\" width=15> <I
NPUT \n"+
" name=gifface type=radio value=8><IMG alt=\" (96 bytes)\"
height=15 \n"+
" src=\"\" width=15> <INPUT name=gifface type=radio value=9
><IMG \n"+
" alt=\" (162 bytes)\" height=15 src=\"\" width=15> <I
NPUT \n"+
" name=gifface type=radio value=10><IMG alt=\" (113 bytes)
\" height=15 \n"+
" src=\"\" width=15> <INPUT name=gifface type=radio value=
11><IMG \n"+
" alt=\" (93 bytes)\" height=15 src=\"\" width=15> <
INPUT \n"+
" name=gifface type=radio value=12> <IMG alt=\" (149 bytes
)\" height=14 \n"+
" src=\"\" width=15> \n"+
" <INPUT \n"+
" name=gifface type=radio value=13> <IMG alt=\" (149 bytes
)\" height=14 \n"+
" src=\"\" width=15> \n"+
" <INPUT \n"+
" name=gifface type=radio value=14> <IMG alt=\" (149 bytes
)\" height=14 \n"+
" src=\"\" width=15> \n"+
" <INPUT \n"+
" name=gifface type=radio value=15> <IMG alt=\" (149 bytes
)\" height=14 \n"+
" src=\"\" width=15> \n"+
" <INPUT \n"+
" name=gifface type=radio value=16> <IMG alt=\" (149 bytes
)\" height=14 \n"+
" src=\"\" width=15> </TD> \n"+
" </TR> \n"+
" <TR> \n"+
" <TD align=middle colSpan=2 noWrap><INPUT name=cmdGO onclick=\"re
turn ValidInput()\" type=submit value=\"Submit\"> \n"+

" <INPUT name=cmdPrev onclick=\"return ValidInput()\" type=submit valu
e=\"Preview\"> \n"+
" <INPUT name=cmd Cancel type=reset value=\"Rewrite\"> <INPUT
T name=cmdBack onclick=javascript:(-1) type=button value=\"Return
Back\"> \n"+
" </TD></TR></TBODY></TABLE></FORM></CENTER></DIV> ";
(lbottom);

%>

</body></html>