jsp留言板源代码三:给jsp初学者_MySQL

来源：微智科技网

reply.jsp
====================================

张家界电话黄页(网上114)

<%@ page contentType="text/html; charset=GB2312" %>
<%@ page language="java" import="java.sql.*" %>

<%
int pages=1;
int pagesize=10;
lwhere=" where ( lw_'"+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_"+lw_class2+"&zt
_time="+zt_time+
"&zt_author="+zt_author+"&";
//out.print(lwhere);
} catch (Exception e) { //out.print("error1: "+e+"

");
}

try{
//取得参数留言内容
lw_ String(request.getParameter("lw_class1").getBytes("ISO
8859_1"));
lw_ 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=" \n"+
" " function ValidInput() \n"+
" {if(document.sign.lw_author.value==\"\") \n"+
" {alert(\"请填写您的大名。\"); \n"+
" document.sign.lw_author.focus(); \n"+
" return false;} \n"+
" if(document.sign.lw_title.value==\"\") \n"+
" {alert(\"请填写留言主题。\"); \n"+
" document.sign.lw_title.focus(); \n"+
" return false;} \n"+
" if (document.sign.author_email.value!=\"\") \n"+
" { if ((document.sign.author_email.value.indexOf(\"@\")<0)//(document
.sign.author_email.value.indexOf(\":\")!=-1)) \n"+
" {alert(\"您填写的EMail无效，请填写一个有效的Email!\"); \n"+
" document.sign.author_emaill.focus(); \n"+
" return false; \n"+
" } \n"+
" } \n"+
" return true; \n"+
" } \n"+
" function ValidSearch() \n"+
" { if(document.frmsearch.findstr.value==\"\") \n"+
" {alert(\"不能搜索空串！\"); \n"+
" document.frmsearch.findstr.focus(); \n"+
" return false;} \n"+
" } \n"+
" //--> \n"+
" ";
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+"
" );
out.println(countsql);
}

totalpages=(int)(count/pagesize);
if(count>totalpages*pagesize) totalpages++;
st=""+
" 0 width=\"95%\"> "+
"

00%\">"+
" 共 "+totalpages+" 页，"+count+"
条. "+" 当前页: "+pages+
"

";

out.print(st);

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

st=" "+
" "+
" "+
" "+
" "+
" "+
" "+
" "+
" ";
//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= "

" color=#ffffff>留言主题

" color=#ffffff>回应数

" color=#ffffff>点击数

" color=#ffffff>作者名

" color=#ffffff>发表/回应时间

> ";
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 =""+
" "+
" "+
" "+
" "+
" "+
" "+
" ";
out.println(linestr);

}
rs.close();
//显示第pages页结束
st= "

" color=#0000cd>留言主题:" +lw_title+"	#0000cd>留言时间:"+st+"
" width=\"700\" wrap=yes> "+lw_content+"
" color=#0000cd>作者:"+lw_author+" " color=#0000cd>来源:"+author_ip+"

"+

" " href=\"guestbook.jsp\"> " color=blue face=楷体_GB2312 size=4>返回留言板
首页
"+
"

> ";

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 if(n>1)
{
//for(i=1;i<=n;i++) out.print(" "+i+">"+i+" ");
//out.print("

">");
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=""+ lt1 + " a>"+
lurlt + "pages="+iFirst+">"+lt2+"&nbs
p; "+
lurlt + "pages="+iPre+">"+lt3+"
" +
lurlt + "pages="+iNext+">"+lt4+"
; " +
lurlt + "pages="+iLast+">"+lt5+"
; ";
st=""+
" 0 width=\"95%\"> "+
"

00%\">"+
lt6+
"

";

out.print(st);

}

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

%>

<%
//留言板界面尾部
String lbottom="";
lbottom=lbottom+
" \n"+
" ";
out.print(lbottom);

%>

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jsp留言板源代码三:给jsp初学者_MySQL