So erstellen Sie mit JSP+MySQL ein Gästebuch (3)

Autor：Eve Cole Aktualisierungszeit：2009-07-02 17:13:14

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"
%>
<%
Klasse CommentError// löst java.lang.NullPointerException aus
{ public String Username="",Sex="",Address="",Postal="",Oicq="",Icq="",Tel="",Comment="";
public boolean NoError=true;//false;
public int ErrorCount=0;
privater boolescher Wert IsNumber(String s1) {}
öffentliche String-Schriftart (String se) {}
public String Comment_Er(String se) {}
public void Benutzername (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) {}
}
Klasse FormatComment
{ public String Replacement(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) {}//Erweitern Sie die Datenbank mit Myqal
}

%>
<html>
<Kopf>
<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>

<Körper>

<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();//IP-Adresse anzeigen
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.Benutzername(Benutzername);
testcomment.Postal (Beitrag);
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
Versuchen Sie es mit {//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);
Benutzername=FC.toSql(Benutzername);
comment=FC.toSql(comment);
MyQuery="In Kommentar einfügen (Benutzername, Geschlecht, Adresse, IP, Beitrag, OICQ, ICQ, Telefonnummer, Kommentar, Uhrzeit, URL, E-Mail) Werte ('"+Benutzername+','"+Geschlecht+"','"+ Adresse+"','"+ip+"',+post+","+oicq+","+icq+",'"+telnumber+"','"+comment+"',now(),'"+url+"' ,'"+email+"');";
sqlRst=sqlStmt.executeQuery (MyQuery); //向数据库中加入数据
sqlRst.close();//Weitere Informationen finden Sie hier
sqlStmt.close ();//Weitere Informationen
sqlConn.close(); //关闭数据库连接
out.print (Zeit);

%>
<font size="5" face="华文行楷">Fantastisches!</font>
<table border="0" cellpadding="0" cellpacing="0" width="100%">
<tbody>
<tr>
<td width="25%">昵称：<%=username%></td>
<td width="25%">性别:<%=sex%></td>
<td colspan="2" width="50%">Anzeige:<%=address %></td>
</tr>
<tr>
<td width="25%">电话:<%=telnumber%></td>
<td width="25%">Weitere Informationen:<%=post%></td>
<td width="25%">OICQ:<%=oicq%></td>
<td width="25%">ICQ:<%=icq%></td>
</tr>
<tr>
<td colspan="2" width="50%">E-Mail:<a href="mailto:" title="写信给留言者"></a></td>
<td colspan="2" width="50%">Anzeige:<a href target="_blank"></a></td>
</tr>
<tr>
<td colspan="4"><font style="COLOR: green; LINE-HEIGHT: 150%">Vorlage:</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) //Weitere Informationen
{ out.print ("<font color=red>留言失败</font>");
out.print (MyQuery);
out.print (Benutzer-ID);
}
anders
{
out.print ("<font color=red>总共有"+testcomment.ErrorCount+"条错误数据,请修改!</font>");
%>

<script language="JavaScript">

<Tabelle>
<tr>
<td>
<table cellpacing="0" cellpadding="0">
<tr>
<td>
<form action="addmysql.jsp" method="POST" name="all_comments" onsubmit="javascript:return (test_comments(this))">
<table border="0" width="100%" cellpacing="0" cellpadding="0">
<tr>
<td width="60%">昵 称：<input name="name" size="20" value="<%if (username != null) out.print (username);%>">< %=testcomment.Comment_Er("Benutzername")%></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</option>
</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>

</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>