如何使用jsp+mysql创建留言本
2012-02-07 02:06
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1.分页显示留言
<%@page import="java.sql.*" import ="java.util.*" import ="java.io.*" contentType="text/html; charset=gb2312" %> <html> <head> <title>萍慧自由空间留言本</title> <meta name="GENERATOR" content="Microsoft FrontPage 4.0"> <meta name="ProgId" content="FrontPage.Editor.Document"> <style type="text/css"><!-- body { font-size: Arraypt} td { font-size: Arraypt}--> </style> </head> <body> <p align="center"><u><font size="5" face="华文新魏">萍慧自由空间留言本</font></u></p> <table width="75%" border="1" bgcolor="#FFCCFF" bordercolorlight="#0000FF" bordercolordark="#6666FF" cellpadding="0" cellspacing="0" align="center"> <tr> <td colspan="5" height="202"> <%//下面处理用户的分页请求 String string_page; int Page,RecoderPage,RecoderRow; try{string_page=request.getParameter("page"); }catch (NullPointerException e){string_page="";} try{Page=Integer.parseInt(string_page); }catch(NumberFormatException e) {Page=0; } 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/p","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 String sqlQuery="select count(*) from comment"; sqlRst=sqlStmt.executeQuery (sqlQuery); sqlRst.next(); int count=sqlRst.getInt(1); //取得总的留言记录数 if (Page>=0)RecoderPage=Page;//处理页面 else RecoderPage=0-Page*10; if (RecoderPage>count/15){ RecoderPage=count/15; Page=RecoderPage; }//页面越界 RecoderRow=RecoderPage*15; //取得要显示的留言记录号 sqlQuery="select * from comment order by userid desc limit "+RecoderRow+",15;"; //一次读取15条记录 sqlRst=sqlStmt.executeQuery (sqlQuery); %> 总共有<%=count%>条留言 <% while (sqlRst.next()) //显示留言 { //取得下一条记录 %> 第<%=sqlRst.getString("userid")%>条 <table width="Array5%" border="1" cellspacing="1" cellpadding="1" bordercolorlight="#6666FF" bordercolordark="#6666FF" bgcolor="#CCCCFF" align="center"> <tr> <td width="25%">昵称:<%=sqlRst.getString("username")%></td> <td width="25%">性别:<%=sqlRst.getString("sex")%></td> <td colspan="2" width="50%">地址:<%=sqlRst.getString("address") %></td> </tr> <tr> <td width="25%">电话:<%=sqlRst.getString("telnumber")%></td> <td width="25%">邮编:<%=sqlRst.getString("post")%></td> <td width="25%">OICQ:<%=sqlRst.getString("oicq")%></td> <td width="25%">ICQ:<%=sqlRst.getString("icq")%></td> </tr> <tr> <td colspan="2" width="50%">Email: <a href="mailto:<%=sqlRst.getString("email")%>" title="写信给留言者"><%=sqlRst.getString("email")%></a></td> <td colspan="2" width="50%">网址: <a href target="_blank"></a><a href="mailto:<%=sqlRst.getString("url")%>" title="写信给留言者"> <%=sqlRst.getString("urltitle")%></a></td> </tr> <tr> <td colspan="4"><font style="line-height: 150%;color: green"> 留言:<%=sqlRst.getString("comment")%><br> -<%=sqlRst.getString("time") %> (来自<%=sqlRst.getString("ip") %>)</font></td> </tr> </table> <hr align="center" noshade size="2" width="Array5%"> <% } %> <% //下面对留言进行分页 int i=count/15; //总页,每页显示15条记录 int j=i/10; //总的大页 ,没10个页面分一大页 //Page 显示的页面 int StartPage; //int HrefPage; if (Page<0) Page=0-Page*10; //10页分一次 StartPage=Page/10; //10页分一次 out.print ("[共有"+(i+1)+"页]"); //out.print ("共有"+j+"屏"); //out.print ("显示第"+Page+"页"); //out.print ("StartPage="+StartPage); if (StartPage>0) out.print ("|<a href="connectmysql.jsp?page=-"+Integer.toString(StartPage-1)+"">前10页</a>"); for (int k=0;k<10;k++) { int p=StartPage*10+k; if (p>i) break; if (p==Page) out.print ("|第"+Integer.toString(p+1)+"页"); else out.print ("|<a href="connectmysql.jsp?page="+p+"">第"+Integer.toString(p+1)+"页</a>"); } if (StartPage<j) out.print ("|<a href="connectmysql.jsp?page=-"+Integer.toString(StartPage+1)+"">后10页</a>"); out.print ("|"); %> </td> </tr> </table> </body> <% //关闭结果集对象 sqlRst.close(); //关闭语句对象 sqlStmt.close (); //关闭数据库连接 sqlConn.close(); %>
2.留言页面:
<%@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> -</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 称:<input name="name" size="20" value="<%if (username != null) out.print (username);%>"><%=testcomment.Comment_Er("username")%></td> <td nowrap width="40%">性 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</op b51f tion> </select><%=testcomment.Comment_Er("sex")%></td> </tr> <tr> <td colspan="2">地 址:<input name="address" size="40" value="<%if (address!=null) out.print(address);%>"><%=testcomment.Comment_Er("address")%></td> </tr> <tr> <td>电 话:<input name="telphone" size="15" value="<%if(telnumber!=null)out.print(telnumber);%>"><%=testcomment.Comment_Er("tel")%></td> <td>邮 编:<input name="postal" size="6" value="<%if(post!=null) out.print(post);%>"><%=testcomment.Comment_Er("postal")%></td> </tr> <tr> <td> OICQ:<input name="oicq" size="10" value="<%if(oicq!=null) out.print (oicq);%>"><%=testcomment.Comment_Er("oicq")%></td> <td> ICQ :<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 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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