jsp中添加一条新的记录有关问题，多谢-Java教程-爱易网页

jsp中添加一条新的记录有关问题，多谢

日期：2014-05-18　浏览次数：20666 次

jsp中添加一条新的记录问题，谢谢
如果输入数据库中已经存在的记录会提示已经有了，而当我输入一条数据库中不存在的记录时，会弹出“添加设备信息失败”，不知道为什么，很急。
代码如下：
equi_add.jsp
<%@ page contentType= "text/html; charset=gb2312 " language= "java " import= "java.sql.* " %>
<html>
<head>
<title> 添加设备 </title>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<style type= "text/css ">

</style>
</head>
<script language= "javascript ">
function mycheck(){
if (form1.EquiNo.value== " "){
alert( "请输入主设备号！ ");form1.EquiNo.focus();return;
}
if (form1.LabId.value== " "){
alert( "请输入实验台编号！ ");form1.LabId.focus();return;
}
if (form1.RoomId.value== " "){
alert( "请输入所属实验室！ ");form1.RoomId.focus();return;
}
if (form1.Charger.value== " "){
alert( "请输入设备负责人！ ");form1.Charger.focus();return;
}
if (form1.MacAddr.value== " "){
alert( "请输入MAC地址！ ");form1.MacAddr.focus();return;
}
if (form1.PowerAddr.value== " "){
alert( "请输入电源控制地址！ ");form1.PowerAddr.focus();return;
}
form1.submit();
}
</script>
<body>
<table width= "100% " border= "0 " cellspacing= "0 " cellpadding= "0 ">
<tr>
<td>
<table width= "777 " height= "609 " border= "0 " align= "center " cellpadding= "0 " cellspacing= "0 " bgcolor= "#FFFFFF ">
<tr>
<td valign= "top "> <table width= "100% " border= "0 " cellspacing= "0 " cellpadding= "0 " class= "tableBorder_LTR ">
<tr>
<td height= "30 " align= "center " bgcolor= "#eeeeee "> ≡≡≡添加设备≡≡≡ </td>
</tr>
</table>
<table width= "100% " height= "396 " border= "0 " cellpadding= "0 " cellspacing= "0 " class= "tableBorder_LBR ">
<tr>
<td width= "10 " height= "395 " valign= "top ">   </td>
<td width= "767 " valign= "top "> <table width= "100% " height= "56 " border= "0 " cellpadding= "0 " cellspacing= "0 ">
<tr>
&nbs

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jsp中添加一条新的记录有关问题，多谢

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