handle 409 status code

spring-security-login-and-registration-frontend/src/main/webapp/WEB-INF/view/registration.jsp

@@ -63,26 +63,17 @@ function register(){
         if(data.message == "success"){
         	window.location.href = "<c:url value="/successRegister.html"></c:url>";
         }
-        else if(data.message == "email"){
-        	$("#emailError").show().html(data.error);
-        }
-        else{
         
-        	var errors = $.parseJSON(data.message);
+       
-        	$.each( errors, function( index,item ){
-        		$("#"+item.field+"Error").show().html(item.defaultMessage);
-        	});
-        	errors = $.parseJSON(data.error);
-            $.each( errors, function( index,item ){
-                $("#globalError").show().append(item.defaultMessage+"<br>");
-            });
-        }
     })
     .fail(function(data) {
         if(data.responseJSON.error.indexOf("MailError") > -1)
         {
             window.location.href = "<c:url value="/emailError.html"></c:url>";
         }
+        else if(data.responseJSON.error == "UserAlreadyExist"){
+            $("#emailError").show().html(data.responseJSON.message);
+        }
         else if(data.responseJSON.error.indexOf("InternalError") > -1){
             window.location.href = "<c:url value="/login.html"></c:url>" + "?message=" + data.responseJSON.message;
         }

spring-security-login-and-registration/src/main/java/org/baeldung/web/controller/RegistrationController.java

@@ -14,6 +14,7 @@ import org.baeldung.persistence.service.IUserService;
 import org.baeldung.persistence.service.UserDto;
 import org.baeldung.registration.OnRegistrationCompleteEvent;
 import org.baeldung.validation.EmailExistsException;
+import org.baeldung.web.error.UserAlreadyExistException;
 import org.baeldung.web.error.UserNotFoundException;
 import org.baeldung.web.util.GenericResponse;
 import org.slf4j.Logger;
@@ -71,7 +72,7 @@ public class RegistrationController {
 
         final User registered = createUserAccount(accountDto);
         if (registered == null) {
-            return new GenericResponse("email", messages.getMessage("message.regError", null, request.getLocale()));
+            throw new UserAlreadyExistException();
         }
         final String appUrl = "http://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath();
         eventPublisher.publishEvent(new OnRegistrationCompleteEvent(registered, request.getLocale(), appUrl));

spring-security-login-and-registration/src/main/java/org/baeldung/web/error/RestResponseEntityExceptionHandler.java

@@ -52,6 +52,14 @@ public class RestResponseEntityExceptionHandler extends ResponseEntityExceptionH
         return handleExceptionInternal(ex, bodyOfResponse, new HttpHeaders(), HttpStatus.NOT_FOUND, request);
     }
 
+    // 409
+    @ExceptionHandler({ UserAlreadyExistException.class })
+    public ResponseEntity<Object> handleUserAlreadyExist(final RuntimeException ex, final WebRequest request) {
+        logger.error("409 Status Code", ex);
+        final GenericResponse bodyOfResponse = new GenericResponse(messages.getMessage("message.regError", null, request.getLocale()), "UserAlreadyExist");
+        return handleExceptionInternal(ex, bodyOfResponse, new HttpHeaders(), HttpStatus.CONFLICT, request);
+    }
+
     // 500
     @ExceptionHandler({ MailAuthenticationException.class })
     public ResponseEntity<Object> handleMail(final RuntimeException ex, final WebRequest request) {

spring-security-login-and-registration/src/main/java/org/baeldung/web/error/UserAlreadyExistException.java

@@ -0,0 +1,23 @@
+package org.baeldung.web.error;
+
+public final class UserAlreadyExistException extends RuntimeException {
+
+    private static final long serialVersionUID = 5861310537366287163L;
+
+    public UserAlreadyExistException() {
+        super();
+    }
+
+    public UserAlreadyExistException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+
+    public UserAlreadyExistException(final String message) {
+        super(message);
+    }
+
+    public UserAlreadyExistException(final Throwable cause) {
+        super(cause);
+    }
+
+}

spring-security-login-and-registration/src/main/webapp/WEB-INF/view/registration.jsp

@@ -6,6 +6,7 @@
 <html>
 <head>
 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
+<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title><spring:message code="label.form.title"></spring:message></title>
 </head>
@@ -16,74 +17,68 @@
                 <spring:message code="label.form.title"></spring:message>
             </h1>
             <br>
-            <form action="/" method="POST" enctype="utf8">
+            <form action="/" method="POST" enctype="utf8" onsubmit="register()">
                 <div class="form-group row" >
                     <label class="col-sm-3"><spring:message code="label.user.firstName"></spring:message></label>
-                    <span class="col-sm-5"><input class="form-control" name="firstName" value="" /></span>
+                    <span class="col-sm-5"><input class="form-control" name="firstName" value="" required/></span>
                     <span id="firstNameError" class="alert alert-danger col-sm-4" style="display:none"></span>
                     
                 </div>
                 <div class="form-group row">
                     <label class="col-sm-3"><spring:message code="label.user.lastName"></spring:message></label>
-                    <span class="col-sm-5"><input class="form-control" name="lastName" value="" /></span>
+                    <span class="col-sm-5"><input class="form-control" name="lastName" value="" required/></span>
                     <span id="lastNameError" class="alert alert-danger col-sm-4" style="display:none"></span>
                     
                 </div>
                 <div class="form-group row">
                     <label class="col-sm-3"><spring:message code="label.user.email"></spring:message></label>
-                    <span class="col-sm-5"><input class="form-control" name="email" value="" /></span>                    
+                    <span class="col-sm-5"><input type="email" class="form-control" name="email" value="" required/></span>                    
                     <span id="emailError" class="alert alert-danger col-sm-4" style="display:none"></span>
                     
                 </div>
                 <div class="form-group row">
                     <label class="col-sm-3"><spring:message code="label.user.password"></spring:message></label>
-                    <span class="col-sm-5"><input class="form-control" name="password" value="" type="password" /></span>
+                    <span class="col-sm-5"><input id="password" class="form-control" name="password" value="" type="password" required/></span>
                     <span id="passwordError" class="alert alert-danger col-sm-4" style="display:none"></span>
                 </div>
                 <div class="form-group row">
                     <label class="col-sm-3"><spring:message code="label.user.confirmPass"></spring:message></label>
-                    <span class="col-sm-5"><input class="form-control" name="matchingPassword" value="" type="password" /></span>
+                    <span class="col-sm-5"><input id="matchPassword" class="form-control" name="matchingPassword" value="" type="password" required/></span>
                     <span id="globalError" class="alert alert-danger col-sm-4" style="display:none"></span>
                 </div>
                 <br>
-                <a href="#" class="btn btn-primary" onclick="register()">
+                <button type="submit" class="btn btn-primary">
                     <spring:message code="label.form.submit"></spring:message>
-                </a>
+                </button>
             </form>
             <br> 
             <a href="<c:url value="login.html" />"><spring:message code="label.form.loginLink"></spring:message></a>
         </div>
     </div>
 
-<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
 <script type="text/javascript">
 function register(){
+	event.preventDefault();
     $(".alert").html("").hide();
+    if($("#password").val() != $("#matchPassword").val()){
+    	$("#globalError").show().html("Password mismatch");
+    	return;
+    }
     var formData= $('form').serialize();
-    $.post("/spring-security-login-and-registration/user/registration",formData ,function(data){
+    $.post("<c:url value="/user/registration"/>",formData ,function(data){
         if(data.message == "success"){
             window.location.href = "<c:url value="/successRegister.html"></c:url>";
         }
-        else if(data.message == "email"){
-            $("#emailError").show().html(data.error);
-        }
-        else{
         
-            var errors = $.parseJSON(data.message);
-            $.each( errors, function( index,item ){
-                $("#"+item.field+"Error").show().html(item.defaultMessage);
-            });
-            errors = $.parseJSON(data.error);
-            $.each( errors, function( index,item ){
-                $("#globalError").show().append(item.defaultMessage+"<br>");
-            });
-        }
     })
     .fail(function(data) {
         if(data.responseJSON.error.indexOf("MailError") > -1)
         {
             window.location.href = "<c:url value="/emailError.html"></c:url>";
         }
+        else if(data.responseJSON.error == "UserAlreadyExist"){
+            $("#emailError").show().html(data.responseJSON.message);
+        }
         else if(data.responseJSON.error.indexOf("InternalError") > -1){
             window.location.href = "<c:url value="/login.html"></c:url>" + "?message=" + data.responseJSON.message;
         }