Hướng dẫn sử dụng Spring MVC Form và Hibernate

-- Create table
create table APPLICANTS
(
  ID       VARCHAR2(50) not null,
  GENDER   VARCHAR2(10) not null,
  NAME     VARCHAR2(50) not null,
  POSITION VARCHAR2(50) not null,
  SKILLS   VARCHAR2(255) not null,
  EMAIL    VARCHAR2(50) not null
) ;

alter table APPLICANTS
  add constraint APPLICANT_PK primary key (ID);

-- Create table
create table APPLICANTS
(
  ID       VARCHAR(50) not null,
  GENDER   VARCHAR(10) not null,
  NAME     VARCHAR(50) not null,
  POSITION VARCHAR(50) not null,
  SKILLS   VARCHAR(255) not null,
  EMAIL    VARCHAR(50) not null,
  primary key (ID)
) ;

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns="http://java.sun.com/xml/ns/javaee"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 id="WebApp_ID" version="3.0">

 <display-name>Spring MVC Form</display-name>
 

</web-app>

<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/maven-v4_0_0.xsd">
 
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.o7planning</groupId>
  <artifactId>SpringMVCAnnotationForm</artifactId>
  <packaging>war</packaging>
  <version>1.0.0</version>
  <name>SpringMVCAnnotationForm Maven Webapp</name>
  <url>http://maven.apache.org</url>


  <properties>
      <java-version>1.7</java-version>
  </properties>

  <repositories>
      <!-- Repository for ORACLE JDBC Driver -->
      <repository>
          <id>codelds</id>
          <url>https://code.lds.org/nexus/content/groups/main-repo</url>
      </repository>
  </repositories>

  <dependencies>

      <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>3.8.1</version>
          <scope>test</scope>
      </dependency>

      <!-- Servlet API -->
      <!-- http://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>provided</scope>
      </dependency>

      <!-- Jstl for jsp page -->
      <!-- http://mvnrepository.com/artifact/javax.servlet/jstl -->
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
      </dependency>


      <!-- JSP API -->
      <!-- http://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
      <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.2</version>
          <scope>provided</scope>
      </dependency>

      <!-- Spring dependencies -->
      <!-- http://mvnrepository.com/artifact/org.springframework/spring-core -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>4.2.5.RELEASE</version>
      </dependency>

      <!-- http://mvnrepository.com/artifact/org.springframework/spring-web -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>4.2.5.RELEASE</version>
      </dependency>

      <!-- http://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>4.2.5.RELEASE</version>
      </dependency>

      <!-- http://mvnrepository.com/artifact/org.springframework/spring-orm -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-orm</artifactId>
          <version>4.2.5.RELEASE</version>
      </dependency>

      <!-- Hibernate -->
      <!-- http://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
      <dependency>
          <groupId>org.hibernate</groupId>
          <artifactId>hibernate-core</artifactId>
          <version>5.1.0.Final</version>
      </dependency>

      <!-- http://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
      <dependency>
          <groupId>org.hibernate</groupId>
          <artifactId>hibernate-entitymanager</artifactId>
          <version>5.1.0.Final</version>
      </dependency>


      <!-- http://mvnrepository.com/artifact/org.hibernate/hibernate-c3p0 -->
      <dependency>
          <groupId>org.hibernate</groupId>
          <artifactId>hibernate-c3p0</artifactId>
          <version>5.1.0.Final</version>
      </dependency>


      <!-- MySQL JDBC driver -->
      <!-- http://mvnrepository.com/artifact/mysql/mysql-connector-java -->
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.34</version>
      </dependency>

      <!-- Oracle JDBC driver -->
      <dependency>
          <groupId>com.oracle</groupId>
          <artifactId>ojdbc6</artifactId>
          <version>11.2.0.3</version>
      </dependency>

    <!-- SQLServer JDBC driver (JTDS) -->
    <!-- http://mvnrepository.com/artifact/net.sourceforge.jtds/jtds -->
    <dependency>
        <groupId>net.sourceforge.jtds</groupId>
        <artifactId>jtds</artifactId>
        <version>1.3.1</version>
    </dependency>

    <!-- Email validator,... -->
    <!-- http://mvnrepository.com/artifact/commons-validator/commons-validator -->
    <dependency>
        <groupId>commons-validator</groupId>
        <artifactId>commons-validator</artifactId>
        <version>1.5.0</version>
    </dependency>

  </dependencies>


  <build>
      <finalName>SpringMVCAnnotationForm</finalName>
      <plugins>
    
          <!-- Config: Maven Tomcat Plugin -->
          <!-- http://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
          <plugin>
              <groupId>org.apache.tomcat.maven</groupId>
              <artifactId>tomcat7-maven-plugin</artifactId>
              <version>2.2</version>
              <!-- Config: contextPath and Port (Default - /SpringMVCAnnotationForm : 8080) -->
              <!--
              <configuration>
                  <path>/</path>
                  <port>8899</port>
              </configuration>
              -->   
          </plugin>
      </plugins>
  </build>   
 

</project>

package org.o7planning.springmvcforms.config;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class SpringWebAppInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
        appContext.register(ApplicationContextConfig.class);

        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("SpringDispatcher",
                new DispatcherServlet(appContext));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
    }

}

package org.o7planning.springmvcforms.config;

import java.util.Properties;

import javax.sql.DataSource;

import org.hibernate.SessionFactory;
import org.o7planning.springmvcforms.dao.ApplicantDAO;
import org.o7planning.springmvcforms.dao.impl.ApplicantDAOImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate5.HibernateTransactionManager;
import org.springframework.orm.hibernate5.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@ComponentScan("org.o7planning.springmvcforms.*")
@EnableTransactionManagement
// Load to Environment.
@PropertySource("classpath:ds-hibernate-cfg.properties")
public class ApplicationContextConfig {



  // Lưu trữ các giá thuộc tính load bởi @PropertySource.
  @Autowired
  private Environment env;
 
 

  @Bean
  public ResourceBundleMessageSource messageSource() {
      ResourceBundleMessageSource rb = new ResourceBundleMessageSource();
      // Load property in message/validator.properties
      rb.setBasenames(new String[] { "messages/validator"});
      return rb;
  }
 

  @Bean(name = "viewResolver")
  public InternalResourceViewResolver getViewResolver() {
      InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
      viewResolver.setPrefix("/WEB-INF/pages/");
      viewResolver.setSuffix(".jsp");
      return viewResolver;
  }

  @Bean(name = "dataSource")
  public DataSource getDataSource() {
      DriverManagerDataSource dataSource = new DriverManagerDataSource();

      dataSource.setDriverClassName(env.getProperty("ds.database-driver"));
      dataSource.setUrl(env.getProperty("ds.url"));
      dataSource.setUsername(env.getProperty("ds.username"));
      dataSource.setPassword(env.getProperty("ds.password"));

      return dataSource;
  }

  @Autowired
  @Bean(name = "sessionFactory")
  public SessionFactory getSessionFactory(DataSource dataSource) throws Exception {
      Properties properties = new Properties();

      // Xem: ds-hibernate-cfg.properties
      properties.put("hibernate.dialect", env.getProperty("hibernate.dialect"));
      properties.put("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
      properties.put("current_session_context_class", env.getProperty("current_session_context_class"));
     

      LocalSessionFactoryBean factoryBean = new LocalSessionFactoryBean();
      factoryBean.setPackagesToScan(new String[] { "org.o7planning.springmvcforms.entity" });
      factoryBean.setDataSource(dataSource);
      factoryBean.setHibernateProperties(properties);
      factoryBean.afterPropertiesSet();
      //
      SessionFactory sf = factoryBean.getObject();
      return sf;
  }

  @Autowired
  @Bean(name = "transactionManager")
  public HibernateTransactionManager getTransactionManager(SessionFactory sessionFactory) {
      HibernateTransactionManager transactionManager = new HibernateTransactionManager(sessionFactory);

      return transactionManager;
  }

  @Bean(name = "applicantDAO")
  public ApplicantDAO getApplicantDAO() {
      return new ApplicantDAOImpl();
  }

}

# DataSource

ds.database-driver=oracle.jdbc.driver.OracleDriver
ds.url=jdbc:oracle:thin:@localhost:1521:db12c
ds.username=shoppingcart
ds.password=12345


# Hibernate Config

hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
hibernate.show_sql=true
current_session_context_class=thread

# DataSource

ds.database-driver=com.mysql.jdbc.Driver
ds.url=jdbc:mysql://localhost:3306/mydatabase
ds.username=root
ds.password=12345


# Hibernate Config

hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.show_sql=true
current_session_context_class=thread

# DataSource

ds.database-driver=net.sourceforge.jtds.jdbc.Driver
ds.url=jdbc:jtds:sqlserver://localhost:1433/simplehr;instance=SQLEXPRESS
ds.username=shoppingcart
ds.password=12345


# Hibernate Config

hibernate.dialect=org.hibernate.dialect.SQLServerDialect
hibernate.show_sql=true
current_session_context_class=thread

package org.o7planning.springmvcforms.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@Configuration
@EnableWebMvc
public class WebMvcConfig extends WebMvcConfigurerAdapter {

 
 
   // Cấu hình để sử dụng các file nguồn tĩnh (html, image, ..)
   // Tương đương với <mvc:resources/> trong cấu hình sử dụng XML.
   @Override
   public void addResourceHandlers(ResourceHandlerRegistry registry) {
       registry.addResourceHandler("/css/**").addResourceLocations("/css/").setCachePeriod(31556926);
       registry.addResourceHandler("/img/**").addResourceLocations("/img/").setCachePeriod(31556926);
       registry.addResourceHandler("/js/**").addResourceLocations("/js/").setCachePeriod(31556926);
   }

   // equivalent for <mvc:default-servlet-handler/> tag
   @Override
   public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
       configurer.enable();
   }

}

package org.o7planning.springmvcforms.entity;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "Applicants")
public class Applicant implements Serializable {

   private static final long serialVersionUID = -7893237204476214050L;
   private String id;
   private String name;
   private String email;

   private String position;
   private String gender;
   private String skills;

   @Id
   @Column(name = "ID", length = 50, nullable = false)
   public String getId() {
       return id;
   }

   public void setId(String id) {
       this.id = id;
   }

   @Column(name = "Name", length = 50, nullable = false)
   public String getName() {
       return name;
   }

   public void setName(String name) {
       this.name = name;
   }

   @Column(name = "Position", length = 50, nullable = false)
   public String getPosition() {
       return position;
   }

   public void setPosition(String position) {
       this.position = position;
   }

   @Column(name = "Gender", length = 10, nullable = false)
   public String getGender() {
       return gender;
   }

   public void setGender(String gender) {
       this.gender = gender;
   }

   @Column(name = "Email", length = 50, nullable = false)
   public String getEmail() {
       return email;
   }

   public void setEmail(String email) {
       this.email = email;
   }

   @Column(name = "Skills", length = 255, nullable = false)
   public String getSkills() {
       return skills;
   }

   public void setSkills(String skills) {
       this.skills = skills;
   }
}

package org.o7planning.springmvcforms.model;

public class ApplicantInfo {

   private String id;
   private String name;
   private String email;

   private String position;
   private String gender;
   private String skillsString;
   private String[] skills;

   public ApplicantInfo() {

   }

 
   // Không được thay đổi Constructor này,
   // Nó được sử dụng trong Hibernate Query.
   public ApplicantInfo(String id, String name, String email, String gender, String position, String skillsString) {
       this.id = id;
       this.name = name;
       this.email = email;

       this.position = position;
       this.gender = gender;
       this.skillsString = skillsString;
       this.skills = toArray(skillsString);
   }

   private String[] toArray(String skillStrings) {
       if (skillStrings == null) {
           return new String[0];
       }
       String[] ret = skillStrings.split(",");
       return ret;
   }

   public String getId() {
       return id;
   }

   public void setId(String id) {
       this.id = id;
   }

   public String getName() {
       return name;
   }

   public void setName(String name) {
       this.name = name;
   }

   public String getEmail() {
       return email;
   }

   public void setEmail(String email) {
       this.email = email;
   }

   public String getPosition() {
       return position;
   }

   public void setPosition(String position) {
       this.position = position;
   }

   public String getGender() {
       return gender;
   }

   public void setGender(String gender) {
       this.gender = gender;
   }

   public String[] getSkills() {
       return skills;
   }

   public void setSkills(String[] skills) {
       this.skills = skills;
       this.skillsString = this.joinString(skills);
   }

   private String joinString(String[] skills) {
       if (skills == null) {
           return "";
       }
       return String.join(",", skills);
   }

   public String getSkillsString() {
       return this.skillsString;
   }

}

package org.o7planning.springmvcforms.dao;

import java.util.List;

import org.o7planning.springmvcforms.entity.Applicant;
import org.o7planning.springmvcforms.model.ApplicantInfo;

public interface ApplicantDAO {

    public Applicant findApplicant(String id);

    public List<ApplicantInfo> listApplicantInfos();

    public void saveApplicant(ApplicantInfo applicantInfo);

    public ApplicantInfo findApplicantInfo(String id);

    public void deleteApplicant(String id);
   
}

package org.o7planning.springmvcforms.dao.impl;

import java.util.List;
import java.util.UUID;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;
import org.o7planning.springmvcforms.dao.ApplicantDAO;
import org.o7planning.springmvcforms.entity.Applicant;
import org.o7planning.springmvcforms.model.ApplicantInfo;
import org.springframework.beans.factory.annotation.Autowired;

public class ApplicantDAOImpl implements ApplicantDAO {

    @Autowired
    private SessionFactory sessionFactory;

    @Override
    public Applicant findApplicant(String id) {
        Session session = sessionFactory.getCurrentSession();
        Criteria crit = session.createCriteria(Applicant.class);
        crit.add(Restrictions.eq("id", id));
        return (Applicant) crit.uniqueResult();
    }

    @Override
    public ApplicantInfo findApplicantInfo(String id) {
        Applicant applicant = this.findApplicant(id);
        if (applicant == null) {
            return null;
        }
        return new ApplicantInfo(applicant.getId(), applicant.getName(), //
                applicant.getEmail(), applicant.getGender(), //
                applicant.getPosition(), applicant.getSkills());
    }

    @Override
    public List<ApplicantInfo> listApplicantInfos() {
        String sql = "Select new " + ApplicantInfo.class.getName()//
                + "(a.id, a.name, a.email, a.gender, a.position, a.skills) "//
                + " from " + Applicant.class.getName() + " a ";
        Session session = sessionFactory.getCurrentSession();
        Query query = session.createQuery(sql);
        return query.list();
    }

    public void saveApplicant(ApplicantInfo applicantInfo) {
        String id = applicantInfo.getId();
        Applicant applicant = null;
        if (id != null) {
            applicant = this.findApplicant(id);
        }
        boolean isNew = false;
        if (applicant == null) {
            isNew = true;
            applicant = new Applicant();
            applicant.setId(UUID.randomUUID().toString());
        }
        applicant.setEmail(applicantInfo.getEmail());
        applicant.setGender(applicantInfo.getGender());
        applicant.setName(applicantInfo.getName());
        applicant.setPosition(applicantInfo.getPosition());
        String skillsString = applicantInfo.getSkillsString();

        applicant.setSkills(skillsString);
        //

        if (isNew) {
            Session session = this.sessionFactory.getCurrentSession();
            session.persist(applicant);
        }
    }

    @Override
    public void deleteApplicant(String id) {
        Applicant applicant = this.findApplicant(id);
        if (applicant != null) {
            this.sessionFactory.getCurrentSession().delete(applicant);
        }
    }

}

package org.o7planning.springmvcforms.validator;

import org.apache.commons.validator.routines.EmailValidator;
import org.o7planning.springmvcforms.model.ApplicantInfo;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

@Component
public class ApplicantValidator implements Validator {
 
   // common-validator library.
   private EmailValidator emailValidator =   EmailValidator.getInstance();

 
   // Các class được hỗ trợ Validate
   @Override
   public boolean supports(Class<?> clazz) {
       return clazz == ApplicantInfo.class;
   }

   @Override
   public void validate(Object target, Errors errors) {
       ApplicantInfo applicantInfo = (ApplicantInfo) target;

 
       // Kiểm tra các field của ApplicantInfo.
       // (Xem thêm file property: messages/validator.property)
       ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name", "NotEmpty.applicantForm.name");
       ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email", "NotEmpty.applicantForm.email");
       ValidationUtils.rejectIfEmptyOrWhitespace(errors, "position", "NotEmpty.applicantForm.position");
       ValidationUtils.rejectIfEmptyOrWhitespace(errors, "gender", "NotEmpty.applicantForm.gender");
     
       if(!emailValidator.isValid(applicantInfo.getEmail())) {
           // Error in email field.
           // Lỗi trường email.
           errors.rejectValue("email", "Pattern.applicantForm.email");
       }
     
       if(applicantInfo.getSkills()== null || applicantInfo.getSkills().length==0 ) {
           errors.rejectValue("skills", "Select.applicantForm.skills");
       }
   
   }

}

NotEmpty.applicantForm.name=Name is required
NotEmpty.applicantForm.email=Email is required
NotEmpty.applicantForm.position=Position is required
NotEmpty.applicantForm.gender=Gender is required

Pattern.applicantForm.email=Email is not valid

Select.applicantForm.skills=Must select at least one skill

// Load property in message/validator.properties

@Bean
public ResourceBundleMessageSource messageSource() {
   ResourceBundleMessageSource rb = new ResourceBundleMessageSource();
   // Load property in message/validator.properties
   rb.setBasenames(new String[] { "messages/validator"});
   return rb;
}

package org.o7planning.springmvcforms.controller;

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

import org.o7planning.springmvcforms.dao.ApplicantDAO;
import org.o7planning.springmvcforms.model.ApplicantInfo;
import org.o7planning.springmvcforms.validator.ApplicantValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
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 org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

@Controller
// Cần thiết cho Hibernate Transaction.
@Transactional
// Cần thiết để sử dụng RedirectAttributes
@EnableWebMvc
public class MyController {

   @Autowired
   private ApplicantDAO applicantDAO;

   @Autowired
   private ApplicantValidator applicantValidator;

   @RequestMapping("/")
   public String homePage(Model model) {

       return applicantList(model);
   }

   @RequestMapping("/applicantList")
   public String applicantList(Model model) {
       List<ApplicantInfo> list = applicantDAO.listApplicantInfos();
       model.addAttribute("applicantInfos", list);
       return "applicantList";
   }

   private Map<String, String> dataForPositions() {
       Map<String, String> positionMap = new LinkedHashMap<String, String>();
       positionMap.put("Developer", "Developer");
       positionMap.put("Leader", "Leader");
       positionMap.put("Tester", "Tester");
       return positionMap;
   }

   private List<String> dataForSkills() {
       List<String> list = new ArrayList<String>();
       list.add("Java");
       list.add("C/C++");
       list.add("C#");
       return list;
   }

   private String formApplicant(Model model, ApplicantInfo applicantInfo) {
       model.addAttribute("applicantForm", applicantInfo);

       Map<String, String> positionMap = this.dataForPositions();

       model.addAttribute("positionMap", positionMap);

       List<String> list = dataForSkills();
       model.addAttribute("skills", list);

       if (applicantInfo.getId() == null) {
           model.addAttribute("formTitle", "Create Applicant");
       } else {
           model.addAttribute("formTitle", "Edit Applicant");
       }

       return "formApplicant";
   }

   @RequestMapping("/createApplicant")
   public String createApplicant(Model model) {

       ApplicantInfo applicantInfo = new ApplicantInfo();

       return this.formApplicant(model, applicantInfo);
   }

   @RequestMapping("/editApplicant")
   public String editApplicant(Model model, @RequestParam("id") String id) {
       ApplicantInfo applicantInfo = null;
       if (id != null) {
           applicantInfo = this.applicantDAO.findApplicantInfo(id);
       }
       if (applicantInfo == null) {
           return "redirect:/applicantList";
       }

       return this.formApplicant(model, applicantInfo);
   }

   @RequestMapping("/deleteApplicant")
   public String deleteApplicant(Model model, @RequestParam("id") String id) {
       if (id != null) {
           this.applicantDAO.deleteApplicant(id);
       }
       return "redirect:/applicantList";
   }

   // Set a form validator
   @InitBinder
   protected void initBinder(WebDataBinder dataBinder) {
  
       // Form mục tiêu
       Object target = dataBinder.getTarget();
       if (target == null) {
           return;
       }
       System.out.println("Target=" + target);

       if (target.getClass() == ApplicantInfo.class) {
           dataBinder.setValidator(applicantValidator);
       }
   }

   // Save or update Applicant
   // 1. @ModelAttribute bind form value
   // 2. @Validated form validator
   // 3. RedirectAttributes for flash value
   @RequestMapping(value = "/saveApplicant", method = RequestMethod.POST)
   public String saveApplicant(Model model, //
           @ModelAttribute("applicantForm") @Validated ApplicantInfo applicantInfo, //
           BindingResult result, //
           final RedirectAttributes redirectAttributes) {

       // Nếu validate có lỗi.
       if (result.hasErrors()) {
           return this.formApplicant(model, applicantInfo);
       }

       this.applicantDAO.saveApplicant(applicantInfo);

       // Important!!: Need @EnableWebMvc
       // Add message to flash scope
       redirectAttributes.addFlashAttribute("message", "Save Applicant Successful");

       return "redirect:/applicantList";

   }

}

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Applicant List</title>
<style>
   table  {
       margin-top: 10px;
       border: solid black 1px;
   }
   table  td {
        padding: 5px;
   }
   .message  {
        font-size:90%;
        color:blue;
        font-style:italic;
        margin-top:30px;
   }
</style>
</head>
<body>



<a href="${pageContext.request.contextPath}/createApplicant">Create Applicant</a>

<br/>


<table border="1">
 <tr>
   <th>Name</th>
   <th>Position</th>
   <th>Gender</th>
   <th>Email</th>
   <th>Skills</th>
   <th>Edit</th>
   <th>Delete</th>
 </tr>
 <c:forEach items="${applicantInfos}" var="info">

 <tr>
   <td> ${info.name}  </td>
   <td> ${info.position}  </td>
   <td> ${info.gender} </td>
   <td> ${info.email} </td>
   <td> ${info.skillsString} </td>
   <td> <a href="deleteApplicant?id=${info.id}">Delete</a> </td>
   <td> <a href="editApplicant?id=${info.id}">Edit</a> </td>
 </tr>    

 </c:forEach>
</table>
<c:if test="${not empty message}">
 
   <div class="message">${message}</div>
</c:if>



</body>
</html>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Create Applicant</title>
<style>
.error-message {
   color: red;
   font-size:90%;
   font-style: italic;
}
</style>
</head>
<body>

   <h3>${formTitle}</h3>

   <form:form action="saveApplicant" method="POST"
       modelAttribute="applicantForm">

       <form:hidden path="id" />

       <table>
           <tr>
               <td>Name</td>
               <td><form:input path="name" /></td>
               <td><form:errors path="name"
                       class="error-message" /></td>      
           </tr>
           <tr>
               <td>Gender</td>
               <td><form:select path="gender">
                       <form:option value="" label="- Gender -" />
                       <form:option value="M" label="Male" />
                       <form:option value="F" label="Female" />
                   </form:select></td>
               <td><form:errors path="gender" class="error-message" /></td>
           </tr>
           <tr>
               <td>Email</td>
               <td><form:input path="email" /></td>
               <td><form:errors path="email" class="error-message" /></td>
           </tr>
           <tr>
               <td>Position</td>
               <td><form:select path="position">
                       <form:options items="${positionMap}" />
                   </form:select></td>
               <td><form:errors path="position" class="error-message" /></td>
           </tr>

           <tr>
               <td>Skills</td>
               <td><c:forEach items="${skills}" var="skill">
                       <form:checkbox path="skills" value="${skill}" label="${skill}" />
                   </c:forEach></td>
               <td><form:errors path="skills" class="error-message" /></td>
           </tr>

           <tr>
               <td>&nbsp;</td>
               <td><input type="submit" value="Submit" />
                  <a href="${pageContext.request.contextPath}/applicantList">Cancel</a>
               </td>
               <td>&nbsp;</td>
           </tr>
       </table>
   </form:form>

</body>
</html>