jsp+mysql制作简单的留言板(4)

对于留言板来说，是要存取数据库的；所以opendata.jsp是必不可少的。

Class.forName("com.mysql.jdbc.Driver").newInstance();

String url

="jdbc:mysql://localhost/mydate?user=root&password=zsliuyu&useUnicode=true&characterEncoding=GB2312";

Connection con=DriverManager.getConnection(url);

Statement smt=con.createStatement();

ResultSet rs;

String sql;

opendata.jsp;

留言板必须把留言保存在数据库中，连接好数据库后，我们就要把使用者的的流言存入数据库中：

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

<%@ page import="java.util.*"%>

<%@ include file="opendata.jsp"%>

<%@ include file="convert.jsp"%>

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

String name,email,subject,memo,sex;

name=request.getParameter("name");

sex=request.getParameter("sex");

email=request.getParameter("email");

subject=request.getParameter("subject");

memo=request.getParameter("memo");

if(name.length()==0||email.length()==0||subject.length()==0||memo.length()==0)

{

out.print("<center><font color=red size=6>输入的字段不可为空</font>");

out.print("<hr><a href=board.jsp>回留言板</a>");

out.print("<a href=message.htm>我要留言</a>");

}

else

{

int count=0,year,month,day,hour,minute,second,lastp;

String time;

GregorianCalendar calendar;<%--利用GregorianCalendar类取得时间--%>

calendar=new GregorianCalendar();

year=calendar.get(Calendar.YEAR);

month=calendar.get(Calendar.MONTH)+1;

day=calendar.get(Calendar.DAY_OF_MONTH);

hour=calendar.get(Calendar.HOUR_OF_DAY);

minute=calendar.get(Calendar.MINUTE);

second=calendar.get(Calendar.SECOND);

time=year+"年"+month+"月"+day+"日"+hour+":"+minute+":"+second;

name=convert(name);

time=convert(time);

subject=convert(subject);

memo=Replace(memo);

memo=convert(memo);

sql="insert into message set name='"+name+"',email='"+email+"',subject='"+subject+"',time='"+time+"',sex='"+sex+"',memo='"+memo+"'";

smt.executeUpdate(sql);

sql="select * from message";

rs=smt.executeQuery(sql);

while(rs.next())

count++;

lastp=(int)Math.ceil((double)count/5);

response.sendRedirect("board.jsp?pageno="+lastp);

}

<html>

</html>

savememo.jsp

这个程序是用来将message.htm的数据存入数据库中