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如何使用J+MySQL创建留言本(三)

作者:黑客防线网安JSP教程基地 来源:黑客防线网安JSP教程基地 浏览次数:0

本篇关键词:创建使用如何 
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
   }
  
   %>
   <html>
   <head>
   <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
   <meta name="GENERATOR" content="Microsoft FrontPage 4.0">
   <meta name="ProgId" content="FrontPage.Editor.Document">
   <title>使用MYsql数据库</title>
   </head>
  
   <body>
  
   <p align="center"><center><font style="COLOR: blue; FONT-FAMILY: 方正舒体,华文行楷,隶书,宋体; FONT-SIZE: 16pt">萍慧jsp留言薄</font></center></p>
   <p align="center">
  
   <%! 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);
                          
   %>
   <font size="5" face="华文行楷">留言成功,谢谢!</font>
   <table border="0" cellpadding="0" cellspacing="0" width="100%">
   <tbody>
     <tr>
      <td width="25%">昵称:<%=username%></td>
      <td width="25%">性别:<%=sex%></td>
      <td colspan="2" width="50%">地址:<%=address %></td>
     </tr>
     <tr>
      <td width="25%">电话:<%=telnumber%></td>
      <td width="25%">邮编:<%=post%></td>
      <td width="25%">OICQ:<%=oicq%></td>
      <td width="25%">ICQ:<%=icq%></td>
     </tr>
     <tr>
      <td colspan="2" width="50%">Email:<a href="mailto:" title="写信给留言者"></a></td>
      <td colspan="2" width="50%">网址:<a href target="_blank"></a></td>
     </tr>
     <tr>
      <td colspan="4"><font style="COLOR: green; LINE-HEIGHT: 150%">留言:</font><%=comment%><font style="COLOR: green; LINE-HEIGHT: 150%"><br>
       &nbsp;&nbsp;&nbsp;&nbsp;-</font><%=time %><font style="COLOR: green; LINE-HEIGHT: 150%">(来自</font><%=ip %><font style="COLOR: green; LINE-HEIGHT: 150%">)</font></td>
     </tr>
   </tbody>
   </table>
   <hr color="#0080c0" noshade size="1" width="100%">
  
   <%
   } catch (SQLException e) //写数据库失败
   { out.print ("<font color=red>留言失败</font>");
     out.print (MyQuery);
     out.print (userid);
   }
   else
   {
     out.print ("<font color=red>总共有"+testcomment.ErrorCount+"条错误数据,请修改!</font>");
   %>
  
   <script language="JavaScript">
   <!--
   function test_comments(theForm)
   {
   if (theForm.name.value == "")
   {    alert("姓名不能为空��-)");
     theForm.name.focus();
     return (false);
   }
   if (theForm.name.value.length > 12)
   { alert("姓名太长不能多于12个字符(既六个汉字)!");
     theForm.name.focus();
     return (false);
   }
  
   if (theForm.address.value.length > 40)
   { alert("地址太长,不能多于40个字符(20个汉字)!");
     theForm.name.focus();
     return (false);
   }
  
   if (theForm.comment.value == "")
   { alert("抱歉,留言不能为空!你必须输入留言");
     theForm.comment.focus();
     return (false);
   }
   if (theForm.comment.value.length > 1000)
   { alert("抱歉,你的留言太长,最多为1000个字符!");
     theForm.comment.focus();
     return (false);
   }
   return (true);
   } -->
   <table>
   <tr>
     <td>
      <table cellspacing="0" cellpadding="0">
       <tr>
        <td><!--表单开始-->
         <form action="addmysql.jsp" method="POST" name="all_comments" onsubmit="javascript:return (test_comments(this))">
          <table border="0" width="100%" cellspacing="0" cellpadding="0">
           <tr>
            <td width="60%">昵&nbsp;称:<input name="name" size="20" value="<%if (username != null) out.print (username);%>"><%=testcomment.Comment_Er("username")%></td>
            <td nowrap width="40%">性&nbsp;别:<select name="sex" size="1">
              <option selected value="男" <%if(sex=="男") out.print ("select"); %>>男</option>
              <option value="女" <%if(sex=="女") out.print ("select"); %>>女</option>
              <option value="保密" <%if(sex=="保密") out.print ("select"); %>>保密</option>
             </select><%=testcomment.Comment_Er("sex")%></td>
           </tr>
           <tr>
            <td colspan="2">地&nbsp;址:<input name="address" size="40" value="<%if (address!=null) out.print(address);%>"><%=testcomment.Comment_Er("address")%></td>
           </tr>
           <tr>
            <td>电&nbsp;话:<input name="telphone" size="15" value="<%if(telnumber!=null)out.print(telnumber);%>"><%=testcomment.Comment_Er("tel")%></td>
            <td>邮&nbsp;编:<input name="postal" size="6" value="<%if(post!=null) out.print(post);%>"><%=testcomment.Comment_Er("postal")%></td>
           </tr>
           <tr>
            <td>&nbsp;OICQ:<input name="oicq" size="10" value="<%if(oicq!=null) out.print (oicq);%>"><%=testcomment.Comment_Er("oicq")%></td>
            <td>&nbsp;ICQ&nbsp;:<input name="icq" size="15" value="<%if(icq!=null)out.print(icq);%>"><%=testcomment.Comment_Er("icq")%></td>
           </tr>
           <tr>
            <td colspan="2">Email:<input name="email" size="25" value="<%if(email!=null) out.print(email);%>"><%//=testcomment.Comment_Er("")%></td>
           </tr>
           <tr>
            <td colspan="2">网&nbsp;址:<input name="url" size="40" value="<%if(url!=null)out.print(url);%>"><%//=testcomment.Comment_Er("")%></td>
           </tr>
           <tr>
            <td colspan="2"><textarea cols="80" name="comment" rows="10" wrap="physical"><%if (comment!=null)out.print (comment);%></textarea>
           <tr>
            <td align="right"><input name="put_submit" type="submit" value="确定" ?></td>
            <td align="left"><input name="r" type="reset" value="重置"></td>
           </tr>
          </table>
         </form>
         <!--提交表单结束-->
        </td>
        <td><%=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!<br>
         不支持html标志</td>
       </tr>
      </table>
     </td>
   </tr>
   </table>
   <%
   }
   %>
   </body>
  

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