废话不多说了,具体代码如下所示:
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<%@ page language= "java" contentType= "text/html; charset=UTF-8" pageEncoding= "UTF-8" %> <%@ page import = "java.util.*" %> <%@ page import = "java.sql.*" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" > <html> <head> <meta http-equiv= "Content-Type" content= "text/html; charset=UTF-8" > <title>表单提交</title> </head> <body> <p align= "center" ><b>表单提交</b><br></p> <center> <div align= "left" > <table height= "60" border= "0" align= "left" > <tr> <td> <form name= "channelform" action= "addChannel.jsp" onsubmit= "return validate_channel_info(this);" method= "post" > 名字: <input type= "text" name= "channelname" /> <br /> ID: <input type= "text" name= "channelid" /> <br /> <input type= "submit" value= "提交" > </form> </td> </tr> </table> <script type= "text/javascript" > function validate_channel_info(channelform) { if (channelform.channelname.value== "" ) { alert( "请输入正确的名字" ); return false ; } else if (!isNumber(channelform.channelid.value)) { alert( "请输入合法ID" ); return false ; } return true ; } function isNumber(str) // 判断是否为非负整数 { var rx = /^[ 0 - 9 ]+$/; return rx.test(str); } </script> </div> </center> </body> </html> |
以上所述是小编给大家介绍的Java后台开发之表单提交之前验证,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://blog.csdn.net/dreams_deng/article/details/54863388