使用AJAX（包含正则表达式）验证用户登录的步骤（ajax表单验证实验实践结论）没想到

随心笔谈1年前 (2023)发布 admin

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<%@ page language=”java” import=”java.util.*” pageEncoding=”utf-8″%>
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”>
<html>
<head>
<script type=”text/javascript” src=”https://www.jb51.net/article/JS/jQuery.js”></script>
<style type=”text/css”>
table {
width: 360px;
height: 45px:
text-align: center;
margin-top: 120px;
border-collapse: collapse;
}

input {
width: 280px;
height: 30px;
}
</style>
</head>
<body>
<form action=”#” method=”post”>
<center>
<table align=”center” border=”1″>
<tr>
<td>用户名:</td>
<td><input type=”text” name=”name” id=”username”
onblur=”verifyName()” /></td>
</tr>
<tr>
<td>密码:</td>
<td><input type=”text” name=”pwd” id=”mypwd”
onblur=”verifyPwd()” /></td>
</tr>
<tr>
<td colspan=”3″ align=”center” height=”36px”><input
type=”button” style=”width: 8rem;height:27px” value=”提交登录验证” /></td>
</tr>
</table>
</center>
</form>
<script type=”text/javascript”>
function verifyName() {
//用户名校验
var verifyName=document.getElementById(“username”).value;
var name=/^[A-Z][0-9A-Za-z_][a-zA-Z0-9_]{5,19}$/; // 大写字母开头 6-20位字符(不允许有符号但是允许有_)
if (!name.test(verifyName)) {
//$(“#username”).after(“<span>大写字母开头6-20位字符(不允许有符号但是允许有_)</span>”);
$(“#username”).css(“border-color”, “red”);
return false;
} else {
return true;
}
}
function verifyPwd() {
//密码
var verifyPwd=document.getElementById(“mypwd”).value;
var pwd=/^[A-Z][A-Za-z0-9]\w{7,14}.{1,20}$/; //大写开头数字字母符号混合 8-15位
if (!pwd.test(verifyPwd)) {
$(“#username”).css(“border-color”, “red”);
return false;
} else {
return true;
}
}

$(function() {
$(“:button”).on(“click”, function() {
$.ajax({
type : “post”,
url : “AJAXServlet”,
data : {
name : $(“#username”).val(),
pwd : $(“#mypwd”).val()
},
dataType : “text”,
success : function(data) {
if (data==”ok”) {
window.location.href=”https://www.jb51.net/article/show.jsp”;
} else {
alert(“登录失败！”);
$(“#mypwd”).val(“”);
$(“#username”).focus().select();
}
}
});
});
});
</script>
</body>
</html>