教你用jsp开发简单留言本-显示留言_JSP编程

教你用jsp开发简单留言本-显示留言: 发布时间：2020-04-21编辑：脚本学堂

教你用jsp开发简单留言本-显示留言

显示留言的页面，文件名guestbook.jsp。

文件名：guestbook.jsp
<html><head>
<META content="text/html; charset=gb2312 " http-equiv=Content-Type>
<title>网上留言本</title></head>
<style type="text/css">
<!--
BODY { FONT-FAMILY: "宋体","Arial Narrow", "Times New Roman"; FONT-SI
ZE: 9pt }
.p1 { FONT-FAMILY: "宋体", "Arial Narrow", "Times New Roman"; FONT-SIZ
E: 12pt }
A:link { COLOR: #00793d; TEXT-DECORATION: none }
A:visited { TEXT-DECORATION: none }
A:hover { TEXT-DECORATION: underline}
TD { FONT-FAMILY: "宋体", "Arial Narrow", "Times New Roman"; FONT-SIZE
: 9pt }
.p2 { FONT-FAMILY: "宋体", "Arial Narrow", "Times New Roman"; FONT-SIZ
E: 9pt; line-height: 150% }
.p3 { FONT-FAMILY: "宋体", "Arial Narrow", "Times New Roman"; FONT-SIZ
E: 9pt; LINE-HEIGHT: 120% }

-->
</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="",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=guestbook.jsp?",llink="";

lwhere=" where lw_type='z' "; //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
inquire_item=new Integer(request.getParameter("range")).intValu
e();
inquire_value=new String(request.getParameter("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{
//取得参数留言内容
lw_class1=new String(request.getParameter("gbname").getBytes("ISO885
9_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"));
lw_ico=request.getParameter("gifface");
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_class2="2";
lw_type=""+"z"; //主贴
zt_time=lw_time;
zt_author=lw_author;
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(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{
String lmsg=testInq.executeUpdate(insertsql);
if(lmsg.indexOf("executeUpdate ok")<0)
out.print("lmsg="+lmsg);

}catch (Exception e) { out.print("错误:"+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);
%>

<%
//留言板界面首部
String ltop=" <DIV align=center> n"+
" <CENTER> n"+
" <FORM action=guestbook.jsp 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=楷体_GB2312 n"+
" size=5>欢迎远方的朋友来张家界旅游观光</FONT></P></TD></TR> n"
+
" <TR bgColor=#6699cc> n"+
" <TD align=left noWrap width="50%">主页: <A n"+
" href="http://www.zj.hn.cn" target=_blank><FONT n"+
" color=#ffffff>张家界旅游</FONT></A> 管理员: <A n"
+
" href="mailto:dzx@mail.zj.hn.cninfo.net"><FONT color=#ffffff>
一民</FONT></A> n"+
" >><A n"+
" href="http://www.zj.hn.cn "><FONT n"+
" color=#ffffff>管理</FONT></A> >><A n"+
" href=" http://www.zj.hn.cn "><FONT n"+
" color=#ffffff>申请</FONT></A> </TD> n"+
" <TD align=right width="50%"><SELECT class=ourfont name=range s
ize=1> n"+
" <OPTION selected value=0>按主题</OPTION> <OPTION value=1>按内
容</OPTION> n"+
" <OPTION value=2>按作者</OPTION> <OPTION value=3>按日期</OPTI
ON> <OPTION n"+
" value=4>按主题&内容</OPTION></SELECT> <INPUT name=findst
r> <INPUT name=search onclick="return ValidSearch()" type=submit val
ue="搜索"> n"+
" </TD></TR></TBODY></TABLE></FORM> n"+
" <HR align=center noShade SIZE=1 width="95%"> n"+
" </CENTER></div> ";
out.print(ltop);
%>

<%
//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,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=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
String linestr="";
for(i=1;i<=pagesize;i++)
if(rs.next())
{
lw_title=rs.getString("lw_title");
answer_num=rs.getInt("answer_num");
click_num=rs.getInt("click_num");
lw_author=rs.getString("lw_author");
lw_time=rs.getString("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=rs.getString("expression");
author_email=rs.getString("author_email");
lw_class1=rs.getString("lw_class1");
lw_class2=rs.getString("lw_class2");
llink="reply.jsp?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>";

out.println(linestr);

}
rs.close();
//显示第pages页结束
st="</TBODY></TABLE><BR>";
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://www.zj.hn.cn>"+ 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> ";

out.print(st);

}

}
} catch (Exception e) { out.println("error: "+e); }
}
%>
<%
//留言板界面尾部
String lbottom="";
lbottom=lbottom+
" n"+
" <FORM action=guestbook.jsp 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=楷体_GB2312 size=5>发表意见</FONT></STRONG> &nbs
p; [加*的内容必须填写] </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%">*留言主题：<INPUT maxLength=40 n
ame=lw_title n"+
" size=36></TD></TR> n"+
" <TR> n"+
" <TD noWrap width="100%">*网上大名：<INPUT maxLength=18 n
ame=lw_author n"+
" size=36></TD></TR> n"+
" <TR> n"+
" <TD noWrap width="100%"> 主页标题：<INPUT maxLength
=40 name=pagetitle n"+
" size=36></TD></TR> n"+
" <TR> n"+
" <TD noWrap width="100%"> 主页地址：<INPUT maxLength
=255 name=author_http n"+
" size=36></TD></TR> n"+
" <TR> n"+
" <TD noWrap width="100%">*电子邮件：<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%">请在下面填写你的留言：</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>表情n"+
" <INPUT name=gifface type=radio value=1 checked><IMG n"+
" alt="1.gif (152 bytes)" height=15 src="1.gif" width=15> <I
NPUT n"+
" name=gifface type=radio value=2><IMG alt="2.gif (174 bytes)"
height=15 n"+
" src="2.gif" width=15> <INPUT name=gifface type=radio value=3
><IMG n"+
" alt="3.gif (147 bytes)" height=15 src="3.gif" width=15> <I
NPUT n"+
" name=gifface type=radio value=4><IMG alt="4.gif (172 bytes)"
height=15 n"+
" src="4.gif" width=15> <INPUT name=gifface type=radio value=5
><IMG n"+
" alt="5.gif (118 bytes)" height=15 src="5.gif" width=15> <I
NPUT n"+
" name=gifface type=radio value=6><IMG alt="6.gif (180 bytes)"
height=15 n"+
" src="6.gif" width=15> <INPUT name=gifface type=radio value=7
><IMG n"+
" alt="7.gif (180 bytes)" height=15 src="7.gif" width=15> <I
NPUT n"+
" name=gifface type=radio value=8><IMG alt="8.gif (96 bytes)"
height=15 n"+
" src="8.gif" width=15> <INPUT name=gifface type=radio value=9
><IMG n"+
" alt="9.gif (162 bytes)" height=15 src="9.gif" width=15> <I
NPUT n"+
" name=gifface type=radio value=10><IMG alt="10.gif (113 bytes)
" height=15 n"+
" src="10.gif" width=15> <INPUT name=gifface type=radio value=
11><IMG n"+
" alt="11.gif (93 bytes)" height=15 src="11.gif" width=15> <
INPUT n"+
" name=gifface type=radio value=12> <IMG alt="12.gif (149 bytes
)" height=14 n"+
" src="12.gif" width=15> n"+
" <INPUT n"+
" name=gifface type=radio value=13> <IMG alt="13.gif (149 bytes
)" height=14 n"+
" src="13.gif" width=15> n"+
" <INPUT n"+
" name=gifface type=radio value=14> <IMG alt="14.gif (149 bytes
)" height=14 n"+
" src="14.gif" width=15> n"+
" <INPUT n"+
" name=gifface type=radio value=15> <IMG alt="15.gif (149 bytes
)" height=14 n"+
" src="15.gif" width=15> n"+
" <INPUT n"+
" name=gifface type=radio value=16> <IMG alt="16.gif (149 bytes
)" height=14 n"+
" src="16.gif" width=15> </TD> n"+
" </TR> n"+
" <TR> n"+
" <TD align=middle colSpan=2 noWrap><INPUT name=cmdGO onclick="re
turn ValidInput()" type=submit value="提交"> n"+

" <INPUT name=cmdPrev onclick="return ValidInput()" type=submit valu
e="预览"> n"+
" <INPUT name=cmdCancel type=reset value="重写"> <INPU
T name=cmdBack onclick=javascript:history.go(-1) type=button value="返
回"> n"+
" </TD></TR></TBODY></TABLE></FORM></CENTER></DIV> ";
out.print(lbottom);
%>
</body></html>

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