Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package JavaMvc.web; import org.apache.shiro.util.StringUtils; import org.springframework.validation.Errors; import org.springframework.validation.ValidationUtils; import org.springframework.validation.Validator; import java.util.regex.Pattern; /** * Validator when editing a user. */ public class EditUserValidator implements Validator { private static final String SIMPLE_EMAIL_REGEX = "[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,4}"; public boolean supports(Class aClass) { return EditUserCommand.class.isAssignableFrom(aClass); } public void validate(Object o, Errors errors) { EditUserCommand command = (EditUserCommand) o; ValidationUtils.rejectIfEmptyOrWhitespace(errors, "username", "error.username.empty", "Please specify a username."); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email", "error.email.empty", "Please specify an email address."); if (StringUtils.hasText(command.getEmail()) && !Pattern.matches(SIMPLE_EMAIL_REGEX, command.getEmail().toUpperCase())) { errors.rejectValue("email", "error.email.invalid", "Please enter a valid email address."); } } }