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
}

%>

萍慧jsp留言薄

<%! 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
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);                      
  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!");
%>