Spring 4 MVC Duplicated Form Submission

spring+4+mvc+duplicated+form+submission

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This is home.html JSP file and it is used display the output for the application.



<html>
<body>
<h1>Spring4 MVC Duplicated Form Submission Example</h1>
<h3><a href="./customerController.htm">Click here to get form page!!!</a></h3>
</body>
</html>

This is CustomerForm.jsp JSP file and it is used display the output for the application.



<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<style>
.error {
color: #ff0000; }
.errorblock{
color: #000;
background-color: #ffEEEE;
border: 3px solid #ff0000;
padding:8px;
margin:16px; }
</style>
</head>
<body>
<h2>Spring's form tags example</h2>
<form:form method="POST" commandName="customerForm">
<form:errors path="*" cssClass="errorblock" element="div"/>
<table>
<tr>
<td>UserName : </td>
<td><form:input path="userName" /></td>
<td><form:errors path="userName" cssClass="error" /></td>
</tr>
<tr>
<td>Address : </td>
<td><form:textarea path="address" /></td>
<td><form:errors path="address" cssClass="error" /></td>
</tr>
<tr>
<td>Password : </td>
<td><form:password path="password" /></td>
<td><form:errors path="password" cssClass="error" /></td>
</tr>
<tr>
<td>Confirm Password : </td>
<td><form:password path="confirmPassword" /></td>
<td><form:errors path="confirmPassword" cssClass="error" /></td>
</tr>
<tr>
<td>Subscribe to newsletter? : </td>
<td><form:checkbox path="receiveNewsletter" /></td>
<td><form:errors path="receiveNewsletter" cssClass="error" /></td>
</tr>
<tr>
<td>Favourite Web Frameworks : </td>
<td>
<form:checkboxes items="${webFrameworkList}" path="favFramework" /> 
</td>
<td><form:errors path="favFramework" cssClass="error" /></td>
</tr>
<tr>
<td>Sex : </td>
<td>
<form:radiobutton path="sex" value="M"/>Male 
<form:radiobutton path="sex" value="F"/>Female 
</td>
<td><form:errors path="sex" cssClass="error" /></td>
</tr>
<tr>
<td>Choose a number : </td>
<td>
<form:radiobuttons path="favNumber" items="${numberList}"  /> 
</td>
<td><form:errors path="favNumber" cssClass="error" /></td>
</tr>
<form:hidden path="secretValue" />
<tr>
<td colspan="3"><input type="submit" /></td>
</tr>
</table>
</form:form>
</body>
</html>

This is CustomerSuccess.jsp JSP file and it is used display the output for the application.



<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
<h2>Spring's form tags example</h2>
<table>
<tr>
<td>UserName :</td><td>${customer.userName}</td>
</tr>
<tr>
<td>Address :</td><td>${customer.address}</td>
</tr>
<tr>
<td>Password :</td><td>${customer.password}</td>
</tr>
<tr>
<td>Confirm Password :</td><td>${customer.confirmPassword}</td>
</tr>
<tr>
<td>Receive Newsletter :</td><td>${customer.receiveNewsletter}</td>
</tr>
<tr>
<td>Favourite Web Frameworks :</td>
<td>
<c:forEach items="${customer.favFramework}" var="current">
   [<c:out value="${current}" />]
</c:forEach>
</td>
</tr>
<tr>
<td>Sex :</td><td>${customer.sex}</td>
</tr>
<tr>
<td>Favourite Number :</td><td>${customer.favNumber}</td>
</tr>
<tr>
<td>Hidden Value :</td><td>${customer.secretValue}</td>
</tr>
</table>
</body>
</html>


This is CustomerController.java file having the controller logic and it will have the services defined in it.


 

    
package com.cv.spring.customer.controller;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;

import com.cv.spring.customer.model.Customer;
/**
@author Chandra Vardhan
*/
public class CustomerController extends SimpleFormController{
  
  public CustomerController(){
    setCommandClass(Customer.class);
    setCommandName("customerForm");
  }
  
  @Override
  protected ModelAndView onSubmit(HttpServletRequest request,
      HttpServletResponse response, Object command, BindException errors)
      throws Exception {

    Customer customer = (Customer)command;
    System.out.println(customer);
    
    //put the model in session, so that it's able pass to another controller
    request.getSession().setAttribute("customer",customer);
        
    return new ModelAndView("customerSuccessRedirect");
  
  }
  
  @Override
  protected Object formBackingObject(HttpServletRequest request)
      throws Exception {

    Customer cust = new Customer();
    //Make "Spring MVC" as default checked value
    cust.setFavFramework(new String []{"Spring MVC"});
    
    //Make "Make" as default radio button selected value
    cust.setSex("M");
    
    //make "Hibernate" as the default java skills selection
    cust.setJavaSkills("Hibernate");
    
    //initilize a hidden value
    cust.setSecretValue("I'm hidden value");
    
    return cust;
  }
  
  @Override
  protected Map referenceData(HttpServletRequest requestthrows Exception {
    
    Map referenceData = new HashMap();
    
    //Data referencing for web framework checkboxes
    List<String> webFrameworkList = new ArrayList<String>();
    webFrameworkList.add("Spring MVC");
    webFrameworkList.add("Struts 1");
    webFrameworkList.add("Struts 2");
    webFrameworkList.add("JSF");
    webFrameworkList.add("Apache Wicket");
    referenceData.put("webFrameworkList", webFrameworkList);
    
    //Data referencing for number radiobuttons
    List<String> numberList = new ArrayList<String>();
    numberList.add("Number 1");
    numberList.add("Number 2");
    numberList.add("Number 3");
    numberList.add("Number 4");
    numberList.add("Number 5");
    referenceData.put("numberList", numberList);
    
    //Data referencing for country dropdown box
    Map<String,String> country = new LinkedHashMap<String,String>();
    country.put("US""United Stated");
    country.put("CHINA""China");
    country.put("SG""Singapore");
    country.put("MY""Malaysia");
    referenceData.put("countryList", country);
    
    //Data referencing for java skills list box
    Map<String,String> javaSkill = new LinkedHashMap<String,String>();
    javaSkill.put("Hibernate""Hibernate");
    javaSkill.put("Spring""Spring");
    javaSkill.put("Apache Wicket""Apache Wicket");
    javaSkill.put("Struts""Struts");
    referenceData.put("javaSkillsList", javaSkill);
    
    return referenceData;
  }
}

This is Customer.java file having the source code to execute business logic.


 

    
package com.cv.spring.customer.model;
/**
@author Chandra Vardhan
*/
public class Customer{
  
  //textbox
  String userName;
  
  //textarea
  String address;
  
  //password
  String password;
  String confirmPassword;
  
  //checkbox
  boolean receiveNewsletter;
  String [] favFramework;
  
  //radio button
  String favNumber;
  String sex;
  
  //dropdown box
  String country;
  String javaSkills;
  
  //hidden value
  String secretValue;
  
  public String getSecretValue() {
    return secretValue;
  }
  public void setSecretValue(String secretValue) {
    this.secretValue = secretValue;
  }
  public String getUserName() {
    return userName;
  }
  public void setUserName(String userName) {
    this.userName = userName;
  }
  public String getAddress() {
    return address;
  }
  public void setAddress(String address) {
    this.address = address;
  }
  public String getPassword() {
    return password;
  }
  public void setPassword(String password) {
    this.password = password;
  }
  public String getConfirmPassword() {
    return confirmPassword;
  }
  public void setConfirmPassword(String confirmPassword) {
    this.confirmPassword = confirmPassword;
  }
  public boolean isReceiveNewsletter() {
    return receiveNewsletter;
  }
  public void setReceiveNewsletter(boolean receiveNewsletter) {
    this.receiveNewsletter = receiveNewsletter;
  }
  public String[] getFavFramework() {
    return favFramework;
  }
  public void setFavFramework(String[] favFramework) {
    this.favFramework = favFramework;
  }
  public String getFavNumber() {
    return favNumber;
  }
  public void setFavNumber(String favNumber) {
    this.favNumber = favNumber;
  }
  public String getSex() {
    return sex;
  }
  public void setSex(String sex) {
    this.sex = sex;
  }
  public String getCountry() {
    return country;
  }
  public void setCountry(String country) {
    this.country = country;
  }
  public String getJavaSkills() {
    return javaSkills;
  }
  public void setJavaSkills(String javaSkills) {
    this.javaSkills = javaSkills;
  }
}

This is CustomerValidator.java file having the source code to execute business logic.


 

    
package com.cv.spring.customer.validator;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.cv.spring.customer.model.Customer;
/**
@author Chandra Vardhan
*/
public class CustomerValidator implements Validator{

  @Override
  public boolean supports(Class clazz) {
    //just validate the Customer instances
    return Customer.class.isAssignableFrom(clazz);

  }

  @Override
  public void validate(Object target, Errors errors) {
    
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "userName",
        "required.userName""Field name is required.");
    
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "address",
        "required.address""Field name is required.");
    
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password",
        "required.password""Field name is required.");
      
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "confirmPassword",
        "required.confirmPassword""Field name is required.");
    
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "sex"
        "required.sex""Field name is required.");
    ValidationUtils.rejectIfEmptyOrWhitespace(errors, "favNumber"
        "required.favNumber""Field name is required.");
    
    ValidationUtils.rejectIfEmptyOrWhitespace(
        errors, "javaSkills""required.javaSkills","Field name is required.");
    
    Customer cust = (Customer)target;
    
    if(!(cust.getPassword().equals(cust.getConfirmPassword()))){
      errors.rejectValue("password""notmatch.password");
    }
    
    if(cust.getFavFramework().length==0){
      errors.rejectValue("favFramework""required.favFrameworks");
    }

    if("NONE".equals(cust.getCountry())){
      errors.rejectValue("country""required.country");
    }
    
  }
  
}



This is pom.xml file having the entries of dependency jars and information to build the application .


	
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.cv.spring.common</groupId> <artifactId>Spring4MVCDuplicatedFormSubmission</artifactId> <packaging>war</packaging> <version>1.0</version> <name>SpringMVC Maven Webapp</name> http://maven.apache.org <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> test </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> <version>2.5.6</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>2.5.6</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> provided </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> </dependencies> <build> <finalName>Spring4MVCDuplicatedFormSubmission</finalName> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.4</version> <configuration> <warSourceDirectory>src/main/webapp</warSourceDirectory> <warName>Spring4MVCDuplicatedFormSubmission</warName> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> </plugins> </build> </project>


This is customer.properties properties file and these properties are used in the application.



required.userName = Username is required!
required.address = Address is required!
required.password = Password is required!
required.passwordConfirm = Confirm password is required!
required.favFrameworks = Please select at least a web frameworks!
required.sex = Please select a sex!
required.favNumber = Please select a number!
notmatch.password = Password and Conform password is not match!


This is mvc-dispatcher-servlet.xml spring configuration file and these entries are used in the application.


 
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd">

<bean
class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
<bean class="com.cv.spring.customer.controller.CustomerController">
<property name="formView" value="CustomerForm" />
<property name="successView" value="customerSuccessRedirect" />
<!-- <property name="successView" value="customerSuccessRedirect" /> -->
<!-- Map a validator -->
<property name="validator">
<bean class="com.cv.spring.customer.validator.CustomerValidator" />
</property>
</bean>
<!-- Redirect Controller -->
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/CustomerSuccess.htm">customerSuccessController</prop>
</props>
</property>
</bean>
<bean id="customerSuccessController"
class="org.springframework.web.servlet.mvc.ParameterizableViewController">
<property name="viewName" value="CustomerSuccess" />
</bean>
<!-- Register the Customer.properties -->
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="customer" />
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
<property name="order" value="1" />
</bean>
<bean class="org.springframework.web.servlet.view.XmlViewResolver">
<property name="location">
<value>/WEB-INF/spring-views.xml</value>
</property>
<property name="order" value="0" />
</bean>
</beans>

This is spring-views.xml spring configuration file and these entries are used in the application.


 
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd">

<!-- Redirect view -->
<bean id="customerSuccessRedirect"
class="org.springframework.web.servlet.view.RedirectView">
<property name="url" value="CustomerSuccess.htm" />
</bean>

</beans>


This is web.xml deployment descriptor file and it describes how the web application should be deployed.


	
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>Spring Web MVC Application</display-name>

<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</context-param>

<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>

<error-page>
<error-code>404</error-code>
<location>/WEB-INF/pages/404.jsp</location>
</error-page>
<error-page>
<exception-type>java.lang.Exception</exception-type>
<location>/WEB-INF/pages/404.jsp</location>
</error-page>

<welcome-file-list>
<welcome-file>home.html</welcome-file>
</welcome-file-list>

</web-app>


This is log4j.properties file having the entries for logging the information into the console/file.



#By default enabling Console appender
# Root logger option
log4j.rootLogger=INFO, stdout

# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%-5p [%c]:%L -->> %m%n

# Redirect log messages to a log file
#log4j.appender.file=org.apache.log4j.RollingFileAppender
#log4j.appender.file.File=C:\servlet-application.log
#log4j.appender.file.MaxFileSize=5MB
#log4j.appender.file.MaxBackupIndex=10
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

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