|
bdjsp
<%@ page contentType="text/html;charset=gb"%>
<% //接受表单提交的字符串
/*
数据只能为azAZ的字符的正则表达式的例子
正则表达式在做程序登陆的过程非常重要不然用´ or ´ 等语句就可以很容易绕过您的程度判断
作者高颂 QQ: 一个简单的例子但是很有用希望起到抛砖引玉的作用
*/
String temp ="我是非法的字符";
String name = requestgetParameter("name"); //应收金额
String pass = requestgetParameter("pass");
if (name==null){
name=temp;
}
if (pass==null){
pass=temp;
}
%>
<%!private boolean regex(String str){
javautilregexPattern p=null; //正则表达式
javautilregexMatcher m=null; //操作的字符串
boolean value=true;
try{
p = javautilregexPatterncompile("[^AZaz]");
m = pmatcher(str);
if(mfind()) {
value=false;
}
}catch(Exception e){}
return value;
}
%>
<html>
<title>信息输入表单</title>
<body>
<form action = "bdjsp" method = "get" >
<div align="center"><font color="#FF">数据只能为azAZ的字符的正则表达式的例子</font>
<table border = "">
<tr>
<td bgcolor = "yellow">用户</td>
<td><input name = "name" type = "text" id="name"></td>
</tr>
<tr>
<td width="" bgcolor = "yellow">密码</td>
<td width=""> <input name = "pass" type = "text" id="input"></td>
</tr>
<tr>
<td colspan = "" align = "center"><input name="submit" type = "submit" value = "确定">
<input name="reset" type = "reset" value = "取消">
</td>
</tr>
<tr>
<td colspan = "" align = "center">消息提示
<%
//判断:
if(!regex(name)){
outprint("用户名只能是azAZ的字符");
return;//跳出程序只行
}
outprint("恭喜您的数据录入合法了<br>"+"您录入的名字是"+name+"<br>您录入的密码是"+pass);
%>
</td>
</tr>
</table>
</div>
</form>
</body>
</html> |
