当chcek用户名可用时，它总是给出mesg'用户名不可用'。它如何解决这个问题。请帮我 提前感谢您的建议或解决方案
注册页面
**Reg.jsp**
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title> ON-DB Registration</title>
<link rel="shortcut icon" href="images/online-chart-sold-products-by-region.png">
<link rel="stylesheet" href="css/bootstrap.css"/>
<link rel="stylesheet" href="css/bootstrapValidator.css"/>
<script type="text/javascript" src="js/jquery-1.11.3.min.js"></script>
<script type="text/javascript" src="js/bootstrap.min.js"></script>
<script type="text/javascript" src="js/bootstrapValidator.js"></script>
</head>
<body>
<div class="main">
<%@include file="Header.jsp" %>
<div class="container">
<div class="row">
<section>
<div class="col-lg-8 col-lg-offset-2">
<div class="page-header">
<h2>Registration</h2>
</div>
<form action="RegistrationSevlet" id="defaultForm" method="post" class="form-horizontal" >
<div class="form-group" id="CheckUsername">
<label class="col-lg-3 control-label">Username</label>
<div class="col-lg-5">
<input type="text" class="form-control" name="username" /><span class="status"></span>
</div>
<div class="progress" id="progressBar" style="margin: 5px 0 0 0; display: none;">
<div class="progress-bar progress-bar-success progress-bar-striped active" style="width: 100%"></div>
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">First Name </label>
<div class="col-lg-5">
<input type="text" class="form-control" name="firstName" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Last Name </label>
<div class="col-lg-5">
<input type="text" class="form-control" name="lastName" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Email </label>
<div class="col-lg-5">
<input type="text" class="form-control" name="email" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Password</label>
<div class="col-lg-5">
<input type="password" class="form-control" name="password" />
</div>
</div>
<div class="form-group">
<div class="col-lg-9 col-lg-offset-3">
<input type="submit" class="btn btn-default" value="SignUp"/>
</div>
</div>
</form>
</div>
</section>s
</div>
</div>
</div>
<script type="text/javascript">
$(document).ready(function() {
$('#defaultForm')
.bootstrapValidator({
framework: 'bootstrap',
message: 'This value is not valid',
feedbackIcons: {
valid: 'glyphicon glyphicon-ok',
invalid: 'glyphicon glyphicon-remove',
validating: 'glyphicon glyphicon-refresh'
},
fields: {
username: {
threshold: 6,
message: 'The username is not valid',
validators: {
notEmpty: {
message: 'The username is required and can\'t be empty',
},
stringLength: {
min: 6,
max: 20,
message: 'The username must be more than 6 and less than 20 characters long',
},
regexp: {
regexp: /^[a-zA-Z0-9_\.]+$/,
message: 'The username can only consist of alphabetical, number, dot and underscore',
},
remote: {
type: "POST",
url: 'Check1',
delay:1000,
message: 'The username is not available',
},
}
},
firstName: {
validators: {
notEmpty: {
message: 'The first name is required and cannot be empty'
}
}
},
lastName: {
validators: {
notEmpty: {
message: 'The last name is required and cannot be empty'
}
}
},
email: {
validators: {
notEmpty: {
message: 'The email is required and can\'t be empty'
},
emailAddress:{
message: 'The input is not a valid '
}
}
},
password: {
validators: {
notEmpty: {
message: 'The password is required and can\'t be empty'
}
}
}
}
})
});
</script>
</body>
</html>
Servlet
Check.java
公共类Check1扩展了HttpServlet { private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
String user_db=null;
PrintWriter out = response.getWriter();
String uname=request.getParameter("username");
System.out.println(uname);
String SQL="SELECT username FROM userinfo WHERE username='"+uname+"'";
Connection con=DBConnection.getConnection(user_db);
Statement st;
ResultSet rs;
boolean status=false;
try
{
st=con.createStatement();
rs=st.executeQuery(SQL);
System.out.println(SQL);
if(!rs.next())
{
status=false;
out.print(status);
System.out.println("false");
}
else
{
status=true;
out.print(status);
System.out.println("true");
}
}
catch(Exception ex)
{
ex.printStackTrace();
}
} }
答案 0 :(得分：0)
您发送回bootstrap验证器的数据不是正确的json格式。将其更改为正确的json格式，我会工作。
这对我有用。根据您的要求进行更改
<input type="button" value="Button" onClick="someFunction()"/>
function someFunction(){
var params = 'line to add parameter'
window.location.href="<s:url action='my-action'/>"+params;
}