add spring validator

src/main/java/com/devjav/controller/AddEmployeeController.java

@@ -7,17 +7,22 @@
 package com.devjav.controller;
 
 import javax.servlet.http.HttpSession;
+import javax.validation.Valid;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.WebDataBinder;
+import org.springframework.web.bind.annotation.InitBinder;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 
 import com.devjav.domain.Employee;
 import com.devjav.form.EmployeeForm;
 import com.devjav.service.EmployeeService;
+import com.devjav.validator.EmployeeValidator;
 
 /**
  * 
@@ -40,16 +45,21 @@ public AddEmployeeController() {
 	}
 
 	@RequestMapping(method = RequestMethod.GET)
-	public String add(Model model,HttpSession session) {
-		if(session.getAttribute("message")!=null){
+	public String add(Model model, HttpSession session) {
+		if (session.getAttribute("message") != null) {
 			model.addAttribute("message", "Insert employee successful.");
 			session.removeAttribute("message");
 		}
 		return getSuccessView();
 	}
 
 	@RequestMapping(method = RequestMethod.POST)
-	public String process(@ModelAttribute EmployeeForm employee,HttpSession session) {
+	public String process(
+			@ModelAttribute("employee") @Valid EmployeeForm employee,
+			BindingResult results, HttpSession session) {
+		if (results.hasErrors()) {
+			return getSuccessView();
+		}
 		Employee emp = new Employee();
 		emp.setEmail(employee.getEmail());
 		emp.setPhone(employee.getPhone());
@@ -66,4 +76,9 @@ public EmployeeForm createModelAttribute() {
 		return new EmployeeForm();
 	}
 
+	@InitBinder(value = "employee")
+	public void initBinder(WebDataBinder binder) {
+		binder.addValidators(new EmployeeValidator());
+	}
+
 }

src/main/java/com/devjav/validator/EmployeeValidator.java

@@ -0,0 +1,50 @@
+/*
+ * devjav [http://devjav.com]
+ * Copyright (C) 2014-2014 Pham Thai Thinh
+ * Contact:[email protected]
+ * 
+ */
+package com.devjav.validator;
+
+import org.springframework.validation.Errors;
+import org.springframework.validation.ValidationUtils;
+import org.springframework.validation.Validator;
+
+import com.devjav.form.EmployeeForm;
+
+/**
+ * 
+ * @author Pham Thai Thinh
+ * 
+ */
+public class EmployeeValidator implements Validator {
+	public boolean supports(Class<?> clazz) {
+		return clazz.isAssignableFrom(EmployeeForm.class);
+	}
+
+	public void validate(Object form, Errors errors) {
+		EmployeeForm employeeForm = (EmployeeForm) form;
+		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "firstName",
+				"error.requried", new Object[] { "First name" });
+		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "lastName",
+				"error.requried", new Object[] { "Last name" });
+
+		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "phone",
+				"error.requried", new Object[] { "Phone" });
+		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email",
+				"error.requried", new Object[] { "Email" });
+
+		if (!errors.hasFieldErrors("email")) {
+			if (!PatternValidator.validateEmail(employeeForm.getEmail())) {
+				errors.rejectValue("email", "error.invalid",
+						new Object[] { "Email" }, "Email is invalid format");
+			}
+		}
+		if (!errors.hasFieldErrors("phone")) {
+			if (!PatternValidator.validatePhone(employeeForm.getPhone())) {
+				errors.rejectValue("phone", "error.invalid",
+						new Object[] { "Phone" }, "Phone is invalid format");
+			}
+		}
+	}
+}

src/main/java/com/devjav/validator/PatternValidator.java

@@ -0,0 +1,32 @@
+/*
+ * devjav [http://devjav.com]
+ * Copyright (C) 2014-2014 Pham Thai Thinh
+ * Contact:[email protected]
+ * 
+ */
+package com.devjav.validator;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * 
+ * @author Pham Thai Thinh
+ * 
+ */
+public class PatternValidator {
+	private static String PHONE = "[0-9]{10}";
+	private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
+			+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
+
+	public static boolean validateEmail(String email) {
+		Pattern pattern = Pattern.compile(EMAIL_PATTERN);
+		Matcher matcher = pattern.matcher(email);
+		return matcher.matches();
+	}
+	public static boolean validatePhone(String phone) {
+		Pattern pattern = Pattern.compile(PHONE);
+		Matcher matcher = pattern.matcher(phone);
+		return matcher.matches();
+	}
+}

src/main/resources/messages.properties

@@ -0,0 +1,11 @@
+#General use
+error.invalid={0} is invalid format.
+error.requried={0} is required.
+
+#Add Employee Form
+employee.form.title=Add Employee
+employee.form.firstname=First name
+employee.form.lastname=Last Name
+employee.form.phone=Phone
+employee.form.email=Email
+#End Add Employee Form

src/main/webapp/WEB-INF/spring/servlet/servlet-context.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans:beans xmlns="http://www.springframework.org/schema/mvc"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
-	xmlns:tx="http://www.springframework.org/schema/tx"
-	xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
+	xmlns:context="http://www.springframework.org/schema/context"
 	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
 		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
@@ -29,4 +29,9 @@
 			</beans:list>
 		</beans:property>
 	</beans:bean>
+	<beans:bean id="messageSource"
+		class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
+		<beans:property name="defaultEncoding" value="UTF-8" />
+		<beans:property name="basenames" value="classpath:messages"/>
+	</beans:bean>
 </beans:beans>

src/main/webapp/WEB-INF/views/add.jsp

@@ -3,6 +3,22 @@
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
+<style type="text/css">
+.error{
+color: red;
+}
+</style>
+	<spring:hasBindErrors name="employee">
+		<div class="error">
+			<h4>Oops!</h4>
+			<ul>
+				<c:forEach var="error" items="${errors.allErrors}">
+					<li><spring:message code="${error.code}"
+							arguments="${error.arguments}" text="${errMsgObj.defaultMessage}"></spring:message></li>
+				</c:forEach>
+			</ul>
+		</div>
+	</spring:hasBindErrors>
 	<c:if test="${not empty message}">
 		<div id="message" style="background-color: green">${message}</div></c:if>
 	<spring:url value="/manage/add.do" var="action" />
@@ -11,19 +27,19 @@
 			<table>
 				<tr>
 					<td>First Name</td>
-					<td><form:input path="firstName" /></td>
+					<td><form:input path="firstName" /><form:errors path="firstName" cssClass="error"/></td>
 				</tr>
 				<tr>
 					<td>Last Name</td>
-					<td><form:input path="lastName" /></td>
+					<td><form:input path="lastName" /><form:errors path="lastName" cssClass="error"/></td>
 				</tr>
 				<tr>
 					<td>Phone</td>
-					<td><form:input path="phone" /></td>
+					<td><form:input path="phone" /><form:errors path="phone" cssClass="error"/></td>
 				</tr>
 				<tr>
-					<td>Email</td>
-					<td><form:input path="email" /></td>
+					<td><spring:message code="employee.form.email"/> <span style="color: red">*</span></td>
+					<td><form:input path="email" /><form:errors path="email" cssClass="error"/></td>
 				</tr>
 				<tr>
 					<td colspan="1"><input type="submit" value="Submit"></td>