TOC

Spring MVCフォームの処理の例

Spring MVCフォーム処理の例

spring-mvc-form-handling-demo

このチュートリアルでは、次のことを行うSpring MVCフォーム処理プロジェクトを紹介します。

  1. フォーム値バインディング-JSPおよびモデル。

  2. フォームの検証とエラーメッセージの表示。

  3. POST / REDIRECT / GETパターンを形成し、フラッシュ属性にメッセージを追加します。

  4. HTMLフォームを使用したCRUD操作、追加、取得、更新、削除。

使用される技術：

  1. 春4.1.6。リリース

  2. メーベン3

  3. ブートストラップ3

  4. HSQLDBドライバー2.3.2

  5. ログバック1.1.3

  6. JDK 1.7

  7. JSTL 1.2

  8. Eclipse IDE

What you’ll build :
単純なユーザー管理プロジェクト。HTMLフォームを使用して、ユーザーを一覧表示、作成、更新、および削除できます。 また、フォームの検証を実行し、エラーメッセージを条件付きで表示する方法についても説明します。 このプロジェクトはBootstrap 3でスタイリングされており、データはHSQL組み込みデータベースに保存されます。

URI構造：

URI 方法 アクション

/ users

GET

リスト、すべてのユーザーを表示

/ users

POST

ユーザーを保存または更新します

/users/{id}

GET

ユーザー{id}を表示します

/users/add

GET

ユーザーフォームの追加を表示

/users/{id}/update

GET

{id}の更新ユーザーフォームを表示する

/users/{id}/delete

POST

ユーザー{id}を削除します

Note
昔は、Spring 3.0より前は、SimpleFormControllerを使用してフォームを処理していました。 Spring 3.0として、このクラスは非推奨となり、Springアノテーション付き@Controllerが優先されます。

Spring MVCフォームバインディング

チュートリアルを開始する前に、Spring MVCフォームバインディングの仕組みを理解する必要があります。

1.1 In controller, you add an object into a model attribute.

    @RequestMapping(value = "/users/add", method = RequestMethod.GET)
    public String showAddUserForm(Model model) {

        User user = new User();
        model.addAttribute("userForm", user);
        //...
    }

1.2 In HTML form, you use spring:form tag and bind the controller object via modelAttribute.

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

1.3 When the HTML form is “POST”, you get the value via @ModelAttribute.

@RequestMapping(value = "/users", method = RequestMethod.POST)
public String saveOrUpdateUser(@ModelAttribute("userForm") User user,
        BindingResult result, Model model) {
    //...
}

完了しました。 チュートリアルを始めましょう。

1. プロジェクトディレクトリ

これが最終的なプロジェクトディレクトリ構造です。 標準のMavenプロジェクト。

spring-mvc-form-handling-directory

2. プロジェクトの依存関係

Spring MVCプロジェクトを開発するには、spring-webmvcが必要です。

pom.xml


    4.0.0
    com.example.form
    spring-mvc-form
    war
    1.0-SNAPSHOT
    SpringMVC + Form Handling Example

    
        1.7
        4.1.6.RELEASE
        2.3.2
        1.1.3
        1.7.12
        1.2
        3.1.0
    

    

        
        
            org.springframework
            spring-core
            ${spring.version}
            
               
                commons-logging
                commons-logging
                
            
        

        
        
            org.springframework
            spring-webmvc
            ${spring.version}
        

        
        
            org.springframework
            spring-jdbc
            ${spring.version}
        

        
        
            org.hsqldb
            hsqldb
            ${hsqldb.version}
        

        
        
            org.slf4j
            jcl-over-slf4j
            ${jcl.slf4j.version}
        

        
            ch.qos.logback
            logback-classic
            ${logback.version}
        

        
        
            jstl
            jstl
            ${jstl.version}
        

        
            javax.servlet
            javax.servlet-api
            ${servletapi.version}
            provided
        

    

    
        

            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.3
                
                    ${jdk.version}
                    ${jdk.version}
                
            

            
            
                org.eclipse.jetty
                jetty-maven-plugin
                9.2.11.v20150529
                
                  10
                  
                    /spring-mvc-form
                  
                
            

            
            
                org.apache.maven.plugins
                maven-eclipse-plugin
                2.9
                
                    true
                    true
                    2.0
                    spring-mvc-form

3. コントローラ

@ModelAttributeを介してフォーム値をバインドする方法、フォームバリデーターを追加する方法、フラッシュ属性にメッセージを追加する方法、ドロップダウンとチェックボックスの値を入力する方法などを示すSpring@Controllerクラス。 自明のコメントを読んでください。

UserController.java

package com.example.form.web;

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

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.stereotype.Controller;
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.ExceptionHandler;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import com.example.form.model.User;
import com.example.form.service.UserService;
import com.example.form.validator.UserFormValidator;

@Controller
public class UserController {

    private final Logger logger = LoggerFactory.getLogger(UserController.class);

    @Autowired
    private UserService userService;

    @Autowired
    UserFormValidator userFormValidator;

    //Set a form validator
    @InitBinder
    protected void initBinder(WebDataBinder binder) {
        binder.setValidator(userFormValidator);
    }

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String index(Model model) {
        logger.debug("index()");
        return "redirect:/users";
    }

    // list page
    @RequestMapping(value = "/users", method = RequestMethod.GET)
    public String showAllUsers(Model model) {

        logger.debug("showAllUsers()");
        model.addAttribute("users", userService.findAll());
        return "users/list";

    }

    // save or update user
    // 1. @ModelAttribute bind form value
    // 2. @Validated form validator
    // 3. RedirectAttributes for flash value
    @RequestMapping(value = "/users", method = RequestMethod.POST)
    public String saveOrUpdateUser(@ModelAttribute("userForm") @Validated User user,
            BindingResult result, Model model,
            final RedirectAttributes redirectAttributes) {

        logger.debug("saveOrUpdateUser() : {}", user);

        if (result.hasErrors()) {
            populateDefaultModel(model);
            return "users/userform";
        } else {

            // Add message to flash scope
            redirectAttributes.addFlashAttribute("css", "success");
            if(user.isNew()){
              redirectAttributes.addFlashAttribute("msg", "User added successfully!");
            }else{
              redirectAttributes.addFlashAttribute("msg", "User updated successfully!");
            }

            userService.saveOrUpdate(user);

            // POST/REDIRECT/GET
            return "redirect:/users/" + user.getId();

            // POST/FORWARD/GET
            // return "user/list";

        }

    }

    // show add user form
    @RequestMapping(value = "/users/add", method = RequestMethod.GET)
    public String showAddUserForm(Model model) {

        logger.debug("showAddUserForm()");

        User user = new User();

        // set default value
        user.setName("example123");
        user.setEmail("[email protected]");
        user.setAddress("abc 88");
        user.setNewsletter(true);
        user.setSex("M");
        user.setFramework(new ArrayList(Arrays.asList("Spring MVC", "GWT")));
        user.setSkill(new ArrayList(Arrays.asList("Spring", "Grails", "Groovy")));
        user.setCountry("SG");
        user.setNumber(2);
        model.addAttribute("userForm", user);

        populateDefaultModel(model);

        return "users/userform";

    }

    // show update form
    @RequestMapping(value = "/users/{id}/update", method = RequestMethod.GET)
    public String showUpdateUserForm(@PathVariable("id") int id, Model model) {

        logger.debug("showUpdateUserForm() : {}", id);

        User user = userService.findById(id);
        model.addAttribute("userForm", user);

        populateDefaultModel(model);

        return "users/userform";

    }

    // delete user
    @RequestMapping(value = "/users/{id}/delete", method = RequestMethod.POST)
    public String deleteUser(@PathVariable("id") int id,
        final RedirectAttributes redirectAttributes) {

        logger.debug("deleteUser() : {}", id);

        userService.delete(id);

        redirectAttributes.addFlashAttribute("css", "success");
        redirectAttributes.addFlashAttribute("msg", "User is deleted!");

        return "redirect:/users";

    }

    // show user
    @RequestMapping(value = "/users/{id}", method = RequestMethod.GET)
    public String showUser(@PathVariable("id") int id, Model model) {

        logger.debug("showUser() id: {}", id);

        User user = userService.findById(id);
        if (user == null) {
            model.addAttribute("css", "danger");
            model.addAttribute("msg", "User not found");
        }
        model.addAttribute("user", user);

        return "users/show";

    }

    private void populateDefaultModel(Model model) {

        List frameworksList = new ArrayList();
        frameworksList.add("Spring MVC");
        frameworksList.add("Struts 2");
        frameworksList.add("JSF 2");
        frameworksList.add("GWT");
        frameworksList.add("Play");
        frameworksList.add("Apache Wicket");
        model.addAttribute("frameworkList", frameworksList);

        Map skill = new LinkedHashMap();
        skill.put("Hibernate", "Hibernate");
        skill.put("Spring", "Spring");
        skill.put("Struts", "Struts");
        skill.put("Groovy", "Groovy");
        skill.put("Grails", "Grails");
        model.addAttribute("javaSkillList", skill);

        List numbers = new ArrayList();
        numbers.add(1);
        numbers.add(2);
        numbers.add(3);
        numbers.add(4);
        numbers.add(5);
        model.addAttribute("numberList", numbers);

        Map country = new LinkedHashMap();
        country.put("US", "United Stated");
        country.put("CN", "China");
        country.put("SG", "Singapore");
        country.put("MY", "Malaysia");
        model.addAttribute("countryList", country);

    }

}

4. フォームバリデーター

4.1 Spring validator example.

UserFormValidator.java

package com.example.form.validator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.example.form.model.User;
import com.example.form.service.UserService;

@Component
public class UserFormValidator implements Validator {

    @Autowired
    @Qualifier("emailValidator")
    EmailValidator emailValidator;

    @Autowired
    UserService userService;

    @Override
    public boolean supports(Class clazz) {
        return User.class.equals(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {

        User user = (User) target;

        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "name", "NotEmpty.userForm.name");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email", "NotEmpty.userForm.email");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "address", "NotEmpty.userForm.address");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "NotEmpty.userForm.password");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "confirmPassword","NotEmpty.userForm.confirmPassword");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "sex", "NotEmpty.userForm.sex");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "country", "NotEmpty.userForm.country");

        if(!emailValidator.valid(user.getEmail())){
            errors.rejectValue("email", "Pattern.userForm.email");
        }

        if(user.getNumber()==null || user.getNumber()<=0){
            errors.rejectValue("number", "NotEmpty.userForm.number");
        }

        if(user.getCountry().equalsIgnoreCase("none")){
            errors.rejectValue("country", "NotEmpty.userForm.country");
        }

        if (!user.getPassword().equals(user.getConfirmPassword())) {
            errors.rejectValue("confirmPassword", "Diff.userform.confirmPassword");
        }

        if (user.getFramework() == null || user.getFramework().size() < 2) {
            errors.rejectValue("framework", "Valid.userForm.framework");
        }

        if (user.getSkill() == null || user.getSkill().size() < 3) {
            errors.rejectValue("skill", "Valid.userForm.skill");
        }

    }

}

validation.properties

NotEmpty.userForm.name = Name is required!
NotEmpty.userForm.email = Email is required!
NotEmpty.userForm.address = Address is required!
NotEmpty.userForm.password = Password is required!
NotEmpty.userForm.confirmPassword = Confirm password is required!
NotEmpty.userForm.sex = Sex is required!
NotEmpty.userForm.number = Number is required!
NotEmpty.userForm.country = Country is required!
Valid.userForm.framework = Please select at least two frameworks!
Valid.userForm.skill = Please select at least three skills!
Diff.userform.confirmPassword = Passwords do not match, please retype!
Pattern.userForm.email = Invalid Email format!

Spring Validatorを実行するには、@InitBinderを介してバリデーターを追加し、モデルに@Validatedの注釈を付けます。 

@InitBinder
protected void initBinder(WebDataBinder binder) {
    binder.setValidator(userFormValidator);
}

@RequestMapping(value = "/users", method = RequestMethod.POST)
public String saveOrUpdateUser(... @Validated User user,
        ...) {

    //...

}

または、手動で実行します。 

@RequestMapping(value = "/users", method = RequestMethod.POST)
public String saveOrUpdateUser(... User user,
        ...) {
    userFormValidator.validate(user, result);
    //...
}

5. HTMLフォーム

すべてのHTMLフォームは、Bootstrapフレームワークを使用したcssスタイルであり、Springフォームタグを使用して表示とフォームのバインドを行います。
5.1ユーザーリスト。

list.jsp

<%@ page session="false"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>








    


        
            
        

        
All Users


        
                

            
                

                    #ID
                    Name
                    Email
                    framework
                    Action
                

            

            

                
                    ${user.id}
                
                ${user.name}
                ${user.email}
                
                                  
                    ${framework}
                            ,

show.jsp

<%@ page session="false"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>









    
        
    

    
User Detail

    


    

        
        
${user.id}

    


    

        
        
${user.name}

    


    

        
        
${user.email}

    


    

        
        
${user.address}

    


    

        
        
${user.newsletter}

    


    

        
        
${user.framework}

    


    

        
        
${user.sex}

    


    

        
        
${user.number}

    


    

        
        
${user.country}

    


    

        
        
${user.skill}

userform.jsp

<%@ page session="false"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>









    
        
            
Add User

        
        
            
Update User

6. データベースのもの

6.1 Create a table and insert some data for testing.

create-db.sql

CREATE TABLE users (
  id INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 100, INCREMENT BY 1) PRIMARY KEY,
  name VARCHAR(30),
  email  VARCHAR(50),
  address VARCHAR(255),
  password VARCHAR(20),
  newsletter BOOLEAN,
  framework VARCHAR(500),
  sex VARCHAR(1),
  NUMBER INTEGER,
  COUNTRY VARCHAR(10),
  SKILL VARCHAR(500)
);

insert-data.sql

INSERT INTO users (name, email, framework) VALUES ('example', '[email protected]', 'Spring MVC, GWT');
INSERT INTO users (name, email) VALUES ('alex', '[email protected]', 'Spring MVC, GWT');
INSERT INTO users (name, email) VALUES ('joel', '[email protected]', 'Spring MVC, GWT');

6.2 Start a HSQLDB embedded database, create a datasource and jdbcTemplate.

SpringDBConfig.java

package com.example.form.config;

import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;

@Configuration
public class SpringDBConfig {

    @Autowired
    DataSource dataSource;

    @Bean
    public NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
        return new NamedParameterJdbcTemplate(dataSource);
    }

    @Bean
    public DataSource getDataSource() {
        EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
        EmbeddedDatabase db = builder.setName("testdb")
                        .setType(EmbeddedDatabaseType.HSQL)
            .addScript("db/sql/create-db.sql")
                        .addScript("db/sql/insert-data.sql").build();
        return db;
    }

}

6.3 User object.

user.java

package com.example.form.model;

import java.util.List;

public class User {
    // form:hidden - hidden value
    Integer id;

    // form:input - textbox
    String name;

    // form:input - textbox
    String email;

    // form:textarea - textarea
    String address;

    // form:input - password
    String password;

    // form:input - password
    String confirmPassword;

    // form:checkbox - single checkbox
    boolean newsletter;

    // form:checkboxes - multiple checkboxes
    List framework;

    // form:radiobutton - radio button
    String sex;

    // form:radiobuttons - radio button
    Integer number;

    // form:select - form:option - dropdown - single select
    String country;

    // form:select - multiple=true - dropdown - multiple select
    List skill;

    //Check if this is for New of Update
    public boolean isNew() {
        return (this.id == null);
    }

    //...

}

7. サービスとDAO

UserService.java

package com.example.form.service;

import java.util.List;
import com.example.form.model.User;

public interface UserService {

    User findById(Integer id);

    List findAll();

    void saveOrUpdate(User user);

    void delete(int id);

}

UserServiceImpl.java

package com.example.form.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.example.form.dao.UserDao;
import com.example.form.model.User;

@Service("userService")
public class UserServiceImpl implements UserService {

    UserDao userDao;

    @Autowired
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    @Override
    public User findById(Integer id) {
        return userDao.findById(id);
    }

    @Override
    public List findAll() {
        return userDao.findAll();
    }

    @Override
    public void saveOrUpdate(User user) {

        if (findById(user.getId())==null) {
            userDao.save(user);
        } else {
            userDao.update(user);
        }

    }

    @Override
    public void delete(int id) {
        userDao.delete(id);
    }

}

UserDao.java

package com.example.form.dao;

import java.util.List;

import com.example.form.model.User;

public interface UserDao {

    User findById(Integer id);

    List findAll();

    void save(User user);

    void update(User user);

    void delete(Integer id);

}

UserDaoImpl.java

package com.example.form.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;
import org.springframework.stereotype.Repository;
import org.springframework.util.StringUtils;

import com.example.form.model.User;

@Repository
public class UserDaoImpl implements UserDao {

    NamedParameterJdbcTemplate namedParameterJdbcTemplate;

    @Autowired
    public void setNamedParameterJdbcTemplate(
        NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
        this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
    }

    @Override
    public User findById(Integer id) {

        Map params = new HashMap();
        params.put("id", id);

        String sql = "SELECT * FROM users WHERE id=:id";

        User result = null;
        try {
            result = namedParameterJdbcTemplate
                          .queryForObject(sql, params, new UserMapper());
        } catch (EmptyResultDataAccessException e) {
            // do nothing, return null
        }

        return result;

    }

    @Override
    public List findAll() {

        String sql = "SELECT * FROM users";
        List result = namedParameterJdbcTemplate.query(sql, new UserMapper());
        return result;

    }

    @Override
    public void save(User user) {

        KeyHolder keyHolder = new GeneratedKeyHolder();

        String sql = "INSERT INTO USERS(NAME, EMAIL, ADDRESS, PASSWORD, NEWSLETTER, FRAMEWORK, SEX, NUMBER, COUNTRY, SKILL) "
                + "VALUES ( :name, :email, :address, :password, :newsletter, :framework, :sex, :number, :country, :skill)";

        namedParameterJdbcTemplate.update(sql, getSqlParameterByModel(user), keyHolder);
        user.setId(keyHolder.getKey().intValue());

    }

    @Override
    public void update(User user) {

        String sql = "UPDATE USERS SET NAME=:name, EMAIL=:email, ADDRESS=:address, "
            + "PASSWORD=:password, NEWSLETTER=:newsletter, FRAMEWORK=:framework, "
            + "SEX=:sex, NUMBER=:number, COUNTRY=:country, SKILL=:skill WHERE id=:id";

        namedParameterJdbcTemplate.update(sql, getSqlParameterByModel(user));

    }

    @Override
    public void delete(Integer id) {

        String sql = "DELETE FROM USERS WHERE id= :id";
        namedParameterJdbcTemplate.update(sql, new MapSqlParameterSource("id", id));

    }

    private SqlParameterSource getSqlParameterByModel(User user) {

        MapSqlParameterSource paramSource = new MapSqlParameterSource();
        paramSource.addValue("id", user.getId());
        paramSource.addValue("name", user.getName());
        paramSource.addValue("email", user.getEmail());
        paramSource.addValue("address", user.getAddress());
        paramSource.addValue("password", user.getPassword());
        paramSource.addValue("newsletter", user.isNewsletter());

        // join String
        paramSource.addValue("framework", convertListToDelimitedString(user.getFramework()));
        paramSource.addValue("sex", user.getSex());
        paramSource.addValue("number", user.getNumber());
        paramSource.addValue("country", user.getCountry());
        paramSource.addValue("skill", convertListToDelimitedString(user.getSkill()));

        return paramSource;
    }

    private static final class UserMapper implements RowMapper {

        public User mapRow(ResultSet rs, int rowNum) throws SQLException {
            User user = new User();
            user.setId(rs.getInt("id"));
            user.setName(rs.getString("name"));
            user.setEmail(rs.getString("email"));
            user.setFramework(convertDelimitedStringToList(rs.getString("framework")));
            user.setAddress(rs.getString("address"));
            user.setCountry(rs.getString("country"));
            user.setNewsletter(rs.getBoolean("newsletter"));
            user.setNumber(rs.getInt("number"));
            user.setPassword(rs.getString("password"));
            user.setSex(rs.getString("sex"));
            user.setSkill(convertDelimitedStringToList(rs.getString("skill")));
            return user;
        }
    }

    private static List convertDelimitedStringToList(String delimitedString) {

        List result = new ArrayList();

        if (!StringUtils.isEmpty(delimitedString)) {
            result = Arrays.asList(StringUtils.delimitedListToStringArray(delimitedString, ","));
        }
        return result;

    }

    private String convertListToDelimitedString(List list) {

        String result = "";
        if (list != null) {
            result = StringUtils.arrayToCommaDelimitedString(list.toArray());
        }
        return result;

    }

}

8. スプリング構成

Spring XMLとJavaConfigの混合。

SpringWebConfig.java

package com.example.form.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

@EnableWebMvc
@Configuration
@ComponentScan({ "com.example.form.web", "com.example.form.service", "com.example.form.dao",
        "com.example.form.exception", "com.example.form.validator" })
public class SpringWebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    }

    @Bean
    public InternalResourceViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/jsp/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }

    @Bean
    public ResourceBundleMessageSource messageSource() {
        ResourceBundleMessageSource rb = new ResourceBundleMessageSource();
        rb.setBasenames(new String[] { "messages/messages", "messages/validation" });
        return rb;
    }

}

spring-web-servlet.xml

web.xml



    Spring3 MVC Application

    
        spring-web
        
            org.springframework.web.servlet.DispatcherServlet
        
        1
    

    
        spring-web
        /
    

    
        500
        /WEB-INF/views/jsp/error.jsp
    

    
        404
        /WEB-INF/views/jsp/error.jsp
    

    
        /WEB-INF/views/jsp/error.jsp

9. Demo

プロジェクトをダウンロードして、mvn jetty:runと入力します 

$ mvn jetty:run
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building SpringMVC + Form Handling Example 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
//...
[INFO] Started Jetty Server
[INFO] Starting scanner at interval of 10 seconds.

9.1 List all users. http://localhost:8080/spring-mvc-form/users

spring-mvc-form-handling-demo1

9.2 Add an user. http://localhost:8080/spring-mvc-form/users/add

spring-mvc-form-handling-demo-add

9.3 Form validation.

spring-mvc-form-handling-demo-add-error

9.4 New user is added. http://localhost:8080/spring-mvc-form/users

spring-mvc-form-handling-demo-add-done

9.5 Delete an user. http://localhost:8080/spring-mvc-form/users/104/delete

spring-mvc-form-handling-demo-delete

ソースコードをダウンロード

ダウンロード-spring4-form-handle-example.zip（80 kb）

Github-未定

参考文献

  1. Springのフォームタグライブラリを使用する

  2. Spring MVC 3検証

  3. RedirectAttributes JavaDoc

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