【SpringBoot】各レイヤーの役割。controller,form,dto,service,repository,entity,mapper

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
	compileOnly 'org.projectlombok:lombok'
	developmentOnly 'org.springframework.boot:spring-boot-devtools'
	runtimeOnly 'com.mysql:mysql-connector-j'
	annotationProcessor 'org.projectlombok:lombok'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
	implementation  'org.mybatis.generator:mybatis-generator-core:1.4.1'
	implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:2.3.0'
	implementation 'org.springframework.boot:spring-boot-starter-web'
}

create dtabase javatest;

use javatest;

CREATE TABLE `user1` (
  `id` int NOT NULL AUTO_INCREMENT,
  `name` varchar(10) DEFAULT NULL,
  `age` int DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

package com.example.demo.controller;

import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;

import com.example.demo.dto.SampleDto;
import com.example.demo.form.SampleForm;
import com.example.demo.service.SampleService;

@Controller
public class SampleController {
	private SampleService service;

	public SampleController(SampleService service) {
		this.service = service;
	}

	@GetMapping("/")
	public String getList(@ModelAttribute SampleForm sampleForm,Model model) {

		// 一覧取得
		List<SampleDto> result = service.getUserList();
		model.addAttribute("sampleList",result);

		return "sampleList";

	}

	@PostMapping("/regist")
	public String registUser(@ModelAttribute SampleForm sampleForm, Model model) {

		// dtoに置き換え
		SampleDto dto = new SampleDto();
		dto.setName(sampleForm.getName());
		dto.setAge(sampleForm.getAge());

		// 登録処理
		service.registUser(dto);

		// 一覧取得
		List<SampleDto> result = service.getUserList();
		model.addAttribute("sampleList",result);

		return "sampleList";

	}
}

package com.example.demo.form;

import lombok.Data;

@Data
public class SampleForm {

	// 名前
	private String name;

	// 年齢
	private Integer age;
}

package com.example.demo.dto;

import lombok.Data;

@Data
public class SampleDto {
	// ID
	private Integer id;

	// 名前
	private String name;

	// 年齢
	private Integer age;
}

package com.example.demo.service;

import java.util.List;

import org.springframework.stereotype.Service;

import com.example.demo.dto.SampleDto;
import com.example.demo.repository.SampleRepository;

@Service
public class SampleService {

	private SampleRepository repository;

	public SampleService(SampleRepository repository) {
		this.repository = repository;
	}


	// ユーザ登録
	public void registUser(SampleDto dto){
		// 入力チェック

		// ロジック系の処理

		Integer result = repository.insertUser(dto);

		if (result.equals(1)) {
			// エラー処理
		}

		// 正常処理
		return;
	}


	// 一覧取得
		public List<SampleDto> getUserList(){

			List<SampleDto> result = repository.selectAll();
			return result;
		}
}

package com.example.demo.repository;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Repository;

import com.example.demo.dto.SampleDto;
import com.example.demo.entity.User1;
import com.example.demo.mapper.User1Mapper;

@Repository
public class SampleRepository {
	private User1Mapper mapper;

	public SampleRepository(User1Mapper mapper) {
		this.mapper = mapper;
	}

	// データ取得
	public List<SampleDto> selectAll(){

		// 一覧取得
		List<User1> data = mapper.selectByExample(null);

		List<SampleDto> result = new ArrayList<SampleDto>();
		for (User1 param : data) {
			SampleDto dto = new SampleDto();
			dto.setId(param.getId());
			dto.setName(param.getName());
			dto.setAge(param.getAge());

			result.add(dto);
		}

		return result;
	}

	// インサート
	public Integer insertUser(SampleDto dto){

		// dtoからentityに置き換え
		User1 user1 = new User1();
		user1.setName(dto.getName());
		user1.setAge(dto.getAge());

		Integer result = mapper.insert(user1);

		return result;
	}
}

package com.example.demo.entity;

public class User1 {

	/**
	 * This field was generated by MyBatis Generator. This field corresponds to the database column user1.id
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	private Integer id;
	/**
	 * This field was generated by MyBatis Generator. This field corresponds to the database column user1.name
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	private String name;
	/**
	 * This field was generated by MyBatis Generator. This field corresponds to the database column user1.age
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	private Integer age;

	/**
	 * This method was generated by MyBatis Generator. This method returns the value of the database column user1.id
	 * @return  the value of user1.id
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	public Integer getId() {
		return id;
	}

	/**
	 * This method was generated by MyBatis Generator. This method sets the value of the database column user1.id
	 * @param id  the value for user1.id
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	public void setId(Integer id) {
		this.id = id;
	}

	/**
	 * This method was generated by MyBatis Generator. This method returns the value of the database column user1.name
	 * @return  the value of user1.name
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	public String getName() {
		return name;
	}

	/**
	 * This method was generated by MyBatis Generator. This method sets the value of the database column user1.name
	 * @param name  the value for user1.name
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	public void setName(String name) {
		this.name = name;
	}

	/**
	 * This method was generated by MyBatis Generator. This method returns the value of the database column user1.age
	 * @return  the value of user1.age
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	public Integer getAge() {
		return age;
	}

	/**
	 * This method was generated by MyBatis Generator. This method sets the value of the database column user1.age
	 * @param age  the value for user1.age
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	public void setAge(Integer age) {
		this.age = age;
	}
}

package com.example.demo.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

import com.example.demo.entity.User1;
import com.example.demo.entity.User1Example;

@Mapper
public interface User1Mapper {

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int countByExample(User1Example example);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int deleteByExample(User1Example example);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int deleteByPrimaryKey(Integer id);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int insert(User1 record);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int insertSelective(User1 record);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	List<User1> selectByExample(User1Example example);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	User1 selectByPrimaryKey(Integer id);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int updateByExampleSelective(@Param("record") User1 record, @Param("example") User1Example example);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int updateByExample(@Param("record") User1 record, @Param("example") User1Example example);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int updateByPrimaryKeySelective(User1 record);

	/**
	 * This method was generated by MyBatis Generator. This method corresponds to the database table user1
	 * @mbggenerated  Fri Jul 14 14:21:29 JST 2023
	 */
	int updateByPrimaryKey(User1 record);
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo.mapper.User1Mapper">
<resultMap id="BaseResultMap" type="com.example.demo.entity.User1">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
<id column="id" jdbcType="INTEGER" property="id" />
<result column="name" jdbcType="VARCHAR" property="name" />
<result column="age" jdbcType="INTEGER" property="age" />
</resultMap>
<sql id="Example_Where_Clause">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
<where>
<foreach collection="oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
<where>
<foreach collection="example.oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
id, name, age
</sql>
<select id="selectByExample" parameterType="com.example.demo.entity.User1Example" resultMap="BaseResultMap">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
select
<if test="distinct">
distinct
</if>
<include refid="Base_Column_List" />
from user1
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null">
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
select 
<include refid="Base_Column_List" />
from user1
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
delete from user1
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="com.example.demo.entity.User1Example">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
delete from user1
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" keyColumn="id" keyProperty="id" parameterType="com.example.demo.entity.User1" useGeneratedKeys="true">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
insert into user1 (name, age)
values (#{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER})
</insert>
<insert id="insertSelective" keyColumn="id" keyProperty="id" parameterType="com.example.demo.entity.User1" useGeneratedKeys="true">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
insert into user1
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="name != null">
name,
</if>
<if test="age != null">
age,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="name != null">
#{name,jdbcType=VARCHAR},
</if>
<if test="age != null">
#{age,jdbcType=INTEGER},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="com.example.demo.entity.User1Example" resultType="java.lang.Integer">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
select count(*) from user1
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
update user1
<set>
<if test="record.id != null">
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.name != null">
name = #{record.name,jdbcType=VARCHAR},
</if>
<if test="record.age != null">
age = #{record.age,jdbcType=INTEGER},
</if>
</set>
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
update user1
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
age = #{record.age,jdbcType=INTEGER}
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="com.example.demo.entity.User1">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
update user1
<set>
<if test="name != null">
name = #{name,jdbcType=VARCHAR},
</if>
<if test="age != null">
age = #{age,jdbcType=INTEGER},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.example.demo.entity.User1">
<!--
WARNING - @mbggenerated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Fri Jul 14 14:21:29 JST 2023.
-->
update user1
set name = #{name,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="utf-8" />
</head>
<body>
<form th:action="@{/regist}" th:object="${sampleForm}" method="post">
<div class="field">
<label>名前</label>
<input type="text" placeholder="名前" th:field="*{name}" >
<div class="ui pointing red basic label" th:errors="*{name}"></div>
</div>
<div>
<label>年齢</label>
<input type="text" placeholder="年齢" th:field="*{age}" >
</div>
<button>登録</button>
</form>
<table>
<tr>
<th>id</th>
<th>name</th>
<th>age</th>
</tr>
<tr th:each="list:${sampleList}">
<td th:text="${list.id}"></td>
<td th:text="${list.name}"></td>
<td th:text="${list.age}"></td>
</tr>
</table>
</body>
</html>

spring:
datasource:
driverClassName: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/javatest?enabledTLSProtocols=TLSv1.2
username: root
password: 〇〇〇〇