jsp留言板源代码三: 给jsp初学者.

作 者: precom (皮蛋) 2000.12.10

reply.jsp

====================================





















<%@ page contentType="text/html; charset=GB2312" %>

<%@ page language="java" import="java.sql.*" %>



<%

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="


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+"

---

");

}



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=" ";

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+"