如何使用JSP+MySQL创建留言本(三)

下面我们开始建立留言的页面！
<%@page
import ="java.util.*"
import ="java.text.*"
import="java.sql.*"
import ="java.io.*"
import ="java.lang.*"
contentType="text/html; charset=gb2312"
%>
<%
class CommentError// throws java.lang.NullPointerException
{ public String Username="",Sex="",Address="",Postal="",Oicq="",Icq="",Tel="",Comment="";
public boolean NoError=true;//false;
public int ErrorCount=0;
private boolean IsNumber(String s1) {}
public String font (String se) {}
public String Comment_Er(String se) {}
public void Username (String se) {}
public void Sex (String se) {}
public void Address (String se) {}
public void Comment (String se) {}
public void Tel (String se) {}
public void Postal (String se) {}
public void Oicq (String se) {}
public void Icq (String se) {}
}
class FormatComment
{ public String Replace(String source, String oldString, String newString) {}
public String formatint(String se) {}
public String fromatcomment(String se) {}
public String toHtmlInput(String str) {}
public String toHtml(String str) {}
public String toSql(String str) {}//转换为可以加入Myqal的格式
}

%>

FrontPage 4.0">

萍慧jsp留言薄

JAVA天堂

<%! String username,sex,address,post,oicq,icq,telnumber,comment,email,url.urltitle;
%>
<%
try{ username=request.getParameter("name");
}catch (NullPointerException e){ username="";}

try{ comment=request.getParameter("comment");
}catch (NullPointerException e){ comment="";}

try{ sex=request.getParameter("sex");
}catch (NullPointerException e){ sex="";}

try{ address=request.getParameter("address");

}catch (NullPointerException e){ address="";}

try{ post=request.getParameter("postal");
}catch (NullPointerException e){ post="";}

try{ oicq=request.getParameter("oicq");
}catch (NullPointerException e){ oicq="";}

try{ icq=request.getParameter("icq");
}catch (NullPointerException e){ icq="";}

try{ telnumber=request.getParameter("telphone");
}catch (NullPointerException e) { telnumber= ""; }
try{ email=request.getParameter("email");
}catch (NullPointerException e) { email= ""; }
try{ url=request.getParameter("url");
}catch (NullPointerException e) { url= ""; }
try{ urltitle=request.getParameter("urltitle");
}catch (NullPointerException e) { urltitle= ""; }

String ip=request.getRemoteAddr();//得到IP地址
String time=(new SimpleDateFormat ("yyyy-MM-dd hh:mm:ss", Locale.US )).format(new java.util.Date());
String userid="";
String MyQuery="";
此处我调用了一个对留言进行合法检验的类

JAVA天堂

CommentError testcomment= new CommentError();
testcomment.Username(username);
testcomment.Postal (post);
testcomment.Sex(sex);
testcomment.Address(address);
testcomment.Tel(telnumber);
testcomment.Comment(comment);
testcomment.Oicq(oicq);
testcomment.Icq(icq);

if (testcomment.NoError) //留言中没有错误,写数据库
try {//写数据库成功
java.sql.Connection sqlConn; //数据库连接对象

java.sql.Statement sqlStmt; //语句对象
java.sql.ResultSet sqlRst; //结果集对象
//登记JDBC驱动对象
Class.forName ("org.gjt.mm.mysql.Driver").newInstance ();
//连接数据库
sqlConn= java.sql.DriverManager.getConnection ("jdbc:mysql://localhost/pinghui","test","");
//创建语句对象
sqlStmt=sqlConn.createStatement (java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_READ_ONLY);
//执行Sql语句
此处调用了一个对留言进行处理的类，是留言能被Mysql承认,
FormatComment FC= new FormatComment();
oicq=FC.formatint(oicq);
icq=FC.formatint(icq); JAVA天堂
post=FC.formatint(post);
telnumber=FC.formatint(telnumber);
username=FC.toSql(username);
comment=FC.toSql(comment);
MyQuery="insert into comment (username,sex,address,ip,post,oicq,icq,telnumber,comment,time,url,email) values (""+username+"",""+sex+"",""+address+"",""+ip+"","+post+","+oicq+","+icq+",""+telnumber+"",""+comment+"",now(),""+url+"",""+email+"");";
sqlRst=sqlStmt.executeQuery (MyQuery); //向数据库中加入数据
sqlRst.close();//关闭结果集对象
sqlStmt.close ();//关闭语句对象
sqlConn.close(); //关闭数据库连接
out.print (time);

%>
留言成功,谢谢!

昵称：<%=username%>	性别：<%=sex%>	地址：<%=address %>
电话：<%=telnumber%>	邮编：<%=post%>	OICQ：<%=oicq%>	ICQ：<%=icq%>
Email：	网址：
留言：<%=comment%> -<%=time %>（来自<%=ip %>）

<%
} catch (SQLException e) //写数据库失败
{ out.print ("留言失败");
out.print (MyQuery);
out.print (userid);
}
else
{
out.print ("总共有"+testcomment.ErrorCount+"条错误数据,请修改!");
%>

javascript">

JAVA天堂 < td>邮 编：<%=testcomment.Comment_Er("postal")%> < td> ICQ ：<%=testcomment.Comment_Er("icq")%> JAVA天堂 昵 称：<%=testcomment.Comment_Er("username")%> 性 别： <%if(sex=="男") out.print ("select"); %>>男 <%if(sex=="女") out.print ("select"); %>>女 <%if(sex=="保密") out.print ("select"); %>>保密 <%=testcomment.Comment_Er("sex")%> 地 址：<%=testcomment.Comment_Er("address")%> 电 话：<%=testcomment.Comment_Er("tel")%> & nbsp;OICQ：<%=testcomment.Comment_Er("oicq")%> Email：<%//=testcomment.Comment_Er("")%> 网 址：<%//=testcomment.Comment_Er("")%> <%if (comment!=null)out.print (comment);%> <%=testcomment.Comment_Er("comment")%>请注意：你所输入的内容中，昵称和留言为必须输入的项目！ 不支持html标志

<%
}
%>

[b]来自:http://www.javah.net/JSP_JSF/20070514/1219.html[/b]