我正在尝试使用jsp和servlet中的bootstrapValidator检查数据库中是否有可用的电子邮件。但问题是它始终显示错误消息，即使电子邮件在数据库中不可用。
我的bootstrap form代码，
<div id="registration-form" class="modal fade" role="dialog">
<div class="modal-dialog registration-modal">
<div class="modal-content">
<form action="registerdone.jsp" method="post" class="form-horizontal" role="form"
id="registrationFormValidation">
<div class="modal-header">
<a class="close cross" data-dismiss="modal">x</a>
<h3>Register</h3>
</div>
<div class="modal-body">
<div class="form-group">
<label class="col-md-3 control-label">Full Name</label>
<div class="col-md-8">
<input type="text" class="form-control" id="name" name="name" placeholder="Your Name">
</div>
</div>
<!-- email -->
<div class="form-group">
<label class="col-md-3 control-label">Email</label>
<div class="col-md-8">
<input type="text" class="form-control" id="email" name="email" placeholder="Your Email">
</div>
</div>
<!-- password -->
<div class="form-group">
<label class="col-md-3 control-label">Password</label>
<div class="col-md-8">
<input type="password" class="form-control" id="password" name="password"
placeholder="Enter Password">
</div>
</div>
<!--confirm password-->
<div class="form-group">
<label class="col-md-3 control-label">Confirm Password</label>
<div class="col-md-8">
<input type="password" class="form-control" id="confirmpassword" name="confirmpassword"
placeholder="Confirm Password">
</div>
</div>
<!-- mobile -->
<div class="form-group">
<label class="col-md-3 control-label">Mobile</label>
<div class="col-md-8">
<input type="text" class="form-control" id="mobile" name="mobile"
placeholder="Enter Mobile">
</div>
</div>
</div>
<div class="modal-footer modal-footer-hidden-border">
<a href="#" class="btn btn-link" data-toggle="modal" data-target="#login" data-dismiss="modal">Already
Registered ? Login</a>
<button type="submit" value="submit" class="btn btn-success">Register
</button>
</div>
</form>
</div>
</div>
</div>
我的bootstrapValidator代码，
<script type="text/javascript">
$(document).ready(function () {
console.log("hiiiiiiii register validations");
var validator = $("#registrationFormValidation").bootstrapValidator({
fields: {
name: {
validators: {
notEmpty: {
message: 'The full name is required'
},
stringLength: {
min: 6,
max: 30,
message: 'The full name must be more than 6 and less than 30 characters long'
},
regexp: {
regexp: /^[a-zA-Z\s]+$/,
message: 'The full name can only consist of alphabetical and spaces'
}
}
},
email: {
message: "Email is required",
validators: {
notEmpty: {
message: "Please provide an email address"
},
stringLength: {
min: 6,
max: 35,
message: "Email must be between 6 and 35 characters long"
},
emailAddress: {
message: "Email address must be valid"
},
regexp: {
regexp: /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/,
message: 'Not a valid email address'
},
remote: {
type: "POST",
url: 'RegistrationEmailCheck',
delay: 1000,
message: 'Email is already available "PLEASE LOGIN"'
}
}
}, //.email
password: {
validators: {
notEmpty: {
message: "Password is required"
},
stringLength: {
min: 8,
message: "Password must be 8 characters long"
},
different: {
field: "email",
message: "Email and Password must be different"
}
}
},
confirmpassword: {
validators: {
notEmpty: {
message: "Confirm Password field is required"
},
identical: {
field: "password",
message: "Confirm Password and Password must match"
}
}
},
mobile: {
validators: {
notEmpty: {
message: "Mobile Number is required"
},
numeric: {
message: "Not a valid phone number"
},
stringLength: {
min: 10,
max: 10,
message: "Only 10 digits are allowed"
},
regexp: {
regexp: /^(?:(?:\+|0{0,2})91(\s*[\-]\s*)?|[0]?)?[789]\d{9}$/,
message: 'Enter a valid number'
}
}
}
}//.fields
});
});
</script>
我的servlet代码，
import dbconnector.DBInfo;
import org.json.simple.JSONObject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
@WebServlet(name = "RegistrationEmailCheck")
public class RegistrationEmailCheck extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json");
PrintWriter out = response.getWriter();
JSONObject json = new JSONObject();
String availEmail = request.getParameter("email");
System.out.println(availEmail);
String SQL = "SELECT email FROM login WHERE email='" + availEmail + "'";
Connection con = DBInfo.getConn();
Statement st;
ResultSet rs;
try {
st = con.createStatement();
rs = st.executeQuery(SQL);
if (!rs.next()) {
out.print(true);
json.put("valid", true);
System.out.println("true");
} else {
out.print(false);
json.put("valid", false);
System.out.println("false");
}
} catch (SQLException ex) {
ex.printStackTrace();
} finally {
out.print(json);
out.close();
}
out.print(json);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
感谢任何帮助。
答案 0 :(得分：1)
使用ajax直接验证您的电子邮件，而不是使用remote方法的bootstrap验证器。
$('#testSubmit').click(function() {
$.ajax({
type : 'post',
url : 'RegistrationEmailCheck',
data: { email: 'sample@test.com'},
success : function(data) {
alert(data);
console.log(data);
}
});
});
在HTML中，您也可以在同一元素中使用onblur函数。但它非常沮丧。所以我添加了按钮。
<button id="testSubmit" />
答案 1 :(得分：0)
我已经弄清楚我的代码有什么问题
问题是它没有从servlet返回有效的json数据。
将我的servlet更改为以下代码
public class RegistrationEmailCheck extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json");
PrintWriter out = response.getWriter();
JSONObject json = new JSONObject();
String availEmail = request.getParameter("email");
System.out.println(availEmail);
String SQL = "SELECT email FROM login WHERE email='" + availEmail + "'";
Connection con = DBInfo.getConn();
Statement st;
ResultSet rs;
try {
st = con.createStatement();
rs = st.executeQuery(SQL);
if (rs.next()) {
out.print("{\"valid\" : false }");
json.put("valid", false);
System.out.println("false");
} else {
out.print("{\"valid\" : true }");
json.put("valid", true);
System.out.println("true");
}
} catch (Exception ex) {
ex.printStackTrace();
} finally {
out.close();
}
}
}
现在问题在于返回有效的json数据。