Go to Qiita Advent Calendar 2024 Top
LoginSignup
5
4

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 3 years have passed since last update.

@moriaki1983

Java, Springでショッピングサイトの管理者機能・画面をつくってみた

Last updated at Posted at 2020-08-02

#はじめに

わたしは、2～3年ほど前からJavaを中心に勉強している者です。
最近になって(遅ればせながら)、Springについて勉強しはじめました。
早速ですが、ショッピングサイトの管理者向け機能・画面を作ってみました。
まだまだ拙いですが、よければ参考にしてみてください。

STSのバージョン : 4.7.0.RELEASE
MySQLのバージョン : 8.0.15
mysql-connector-javaのバージョン ： 8.0.16

SampleApplication.java
package com.example.demo;


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;


@SpringBootApplication
public class Sample1Application {
	@RequestMapping(value = "/index", method = RequestMethod.GET)
    public String index() {
		
		return "index";
    }
    
	public static void main(String[] args) {
		SpringApplication.run(Sample1Application.class, args);
	}
}
SampleController.java
package com.example.demo;


import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import java.util.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;


@Controller
public class SampleController {
	@Autowired
	JdbcTemplate jdbcTemplate;
	
	@Autowired
	private SampleService sampleService;
	
	@ModelAttribute
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login(Model model) {
		LoginForm loginForm = new LoginForm();
		loginForm.setId("");
		loginForm.setName("");
        model.addAttribute("loginForm", loginForm);
        model.addAttribute("message", "管理者情報を入力してください");
        
        return "login";
    }

	@ModelAttribute
	@RequestMapping(value = "/login_result", method = RequestMethod.POST)
	public String login_result(LoginForm loginForm, Model model) {
		       List<Map<String, Object>> list;
		       list = jdbcTemplate.queryForList("select * from user");
		       
               for(int i = 0; i < list.size(); i++) {
            	   if (("[" + loginForm.getId() + "," + " " + loginForm.getName() + "]").compareTo((list.get(i).values().toString())) == 0) {
            	        model.addAttribute("message", "ログインに成功しました");
                   }
               
                   else {
            	         model.addAttribute("message", "ログインに失敗しました");
                   }
               }

	    	return "login_result";
	}
	
    @ModelAttribute
    @RequestMapping(value = "/admin_menu", method = RequestMethod.GET)
    public String admin_menu(Model model) {
	  model.addAttribute("message", "メニューを選択してください");

    return "admin_menu";
    }
    
    @ModelAttribute
    @RequestMapping(value = "/show_product", method = RequestMethod.GET)
    public String show_product(Model model) {
    	List<String> products = null;
    	products = sampleService.selectAll();
    	model.addAttribute("products",products);
	    model.addAttribute("message", "商品を表示しました");

    return "show_product";
    }
    
    @ModelAttribute
    @RequestMapping(value = "/register_product", method = RequestMethod.GET)
    public String register_product(Model model) {
    	ProductForm productForm = new ProductForm();
    	model.addAttribute("productForm", productForm);
	    model.addAttribute("message", "商品を登録してください");

    return "register_product";
    }

	@ModelAttribute
    @RequestMapping(value = "/update_product", method = RequestMethod.GET)
    public String update_product(Model model) {
      ProductForm productForm = new ProductForm();
      model.addAttribute("productForm", productForm);
	  model.addAttribute("message", "商品を更新してください");

    return "update_product";
    }
	
    @ModelAttribute
    @RequestMapping(value = "/delete_product", method = RequestMethod.GET)
    public String delete_product(Model model) {
      ProductForm productForm = new ProductForm();
      model.addAttribute("productForm", productForm);    	
	  model.addAttribute("message", "商品を削除してください");

    return "delete_product";
    }
    
    @ModelAttribute
    @RequestMapping(value = "/afeter_delete_product", method = RequestMethod.POST)
    public String afeter_delete_product(ProductForm productForm, Model model) {
      sampleService.delete(productForm);	
	  model.addAttribute("message", "処理が完了しました");

    return "afeter_delete_product";
    }
    
    @ModelAttribute
    @RequestMapping(value = "/show_result", method = RequestMethod.POST)
    public String show_result(ProductForm productForm, Model model) {
    	sampleService.insert(productForm);
	    model.addAttribute("message", "処理が完了しました");

    return "show_result";
    }
}
SampleService.java
package com.example.demo;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import org.springframework.stereotype.Service;


@Service
public class SampleService {  
  public List<String> selectAll() {
	  List<String> entities = null;
	  entities = new ArrayList<String>();
	  ResultSet resultSet = null;
	  Connection connection = null;
	  
	  try {
		  connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?serverTimezone=JST", "root", "root");
          Statement statement = connection.createStatement();
          resultSet = statement.executeQuery("select * from product");

	  while (resultSet.next()) {
		  String str = resultSet.getString("code") + "  " + resultSet.getString("name") + "  " + resultSet.getString("description") + "  " + resultSet.getString("price") + "  " + resultSet.getString("evaluation");
		  entities.add(str);
	  }

		if (connection != null) {
			connection.close();
		}

	  } catch (SQLException e) {
          e.printStackTrace();
	  }
	  
      return entities;
   }
  
  public void insert(ProductForm productForm) {
	  Connection connection = null;
	  
	  try {
		  connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?serverTimezone=JST", "root", "root");
		  PreparedStatement statement = connection.prepareStatement("INSERT INTO product VALUES (?, ?, ?, ?, ?)");

		  statement.setString(1, productForm.getCode());
          statement.setString(2, productForm.getName());
          statement.setString(3, productForm.getDescription());
          statement.setString(4, productForm.getPrice());
          statement.setString(5, productForm.getEvaluation());
          
          connection.setAutoCommit(true);
          statement.execute();

		if (connection != null) {
			connection.close();
		}

	  } catch (SQLException e) {
          e.printStackTrace();
	  }
   }

  public void update(ProductForm productForm) {
	  Connection connection = null;
	  
	  try {
		  connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?serverTimezone=JST", "root", "root");
		  PreparedStatement statement = connection.prepareStatement("UPDATE product SET code=?, name=?, description=?, price=?, evaluation=? WHERE code=?");

		  statement.setString(1, productForm.getCode());
          statement.setString(2, productForm.getName());
          statement.setString(3, productForm.getDescription());
          statement.setString(4, productForm.getPrice());
          statement.setString(5, productForm.getEvaluation());
          statement.setString(6, productForm.getCode());

          connection.setAutoCommit(true);
          statement.execute();

		if (connection != null) {
			connection.close();
		}

	  } catch (SQLException e) {
          e.printStackTrace();
	  }
   }
  
  public void delete(ProductForm productForm) {
	  Connection connection = null;
	  
	  try {
		  connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?serverTimezone=JST", "root", "root");
		  PreparedStatement statement = connection.prepareStatement("DELETE FROM product WHERE code=?");

          statement.setString(1, productForm.getCode());

          connection.setAutoCommit(true);
          statement.execute();
          
		if (connection != null) {
			connection.close();
		}

	  } catch (SQLException e) {
          e.printStackTrace();
	  }
   }
}
LoginForm.java
package com.example.demo;


public class LoginForm {
    private String id;
    private String name;
    
	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;
	}
}
ProductForm.java
package com.example.demo;


public class ProductForm {
    private String code;
    private String name;
    private String description;
    private String price;
    private String evaluation;
    
	public String getCode() {
		return code;
	}
	
	public void setCode(String code) {
		this.code = code;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
	public String getDescription() {
		return description;
	}
	
	public void setDescription(String description) {
		this.description = description;
	}
	
	public String getPrice() {
		return price;
	}
	
	public void setPrice(String price) {
		this.price = price;
	}

	public String getEvaluation() {
		return evaluation;
	}
	
	public void setEvaluation(String evaluation) {
		this.evaluation = evaluation;
	}	
}

以上のソースファイルをプロジェクトのsrc/main/javaに格納します。

index.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p>Spring-Shopsite にようこそ！</p>
<a href="/login" >管理者の方は こちらからどうぞ</a>
</body>
</html>
login.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<form th:action="@{/login_result}" th:object="${loginForm}" method="post">  
ID：<input type="text" th:field="*{id}">
<BR/>
お名前：<input type="text" th:field="*{name}"> 
<BR/>
<input type="submit" value="ログイン"/>
<BR/>
</form>
</body>
</html>
login_result.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<div th:if="${#strings.equals(message, 'ログインに成功しました')}">
<a href="/admin_menu">管理者向けメニュー</a>
</div>
<div th:if="${#strings.equals(message, 'ログインに失敗しました')}">
<a href="/login">ログインし直してください</a>
</div>
</body>
</html>
admin_menu.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<a href="/show_product">登録済み全商品の表示</a>
<br/>
<a href="/register_product">商品の登録</a>
<br/>
<a href="/update_product">商品の更新</a>
<br/>
<a href="/delete_product">商品の削除</a>
</body>
</html>
show_product.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<table th:each="product : ${products}">
<tr>
<td>
<p th:text="${product}"></p>
</td>
</tr>
</table>
</body>
</html>
register_product.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<form th:action="@{/show_result}" th:object="${productForm}" method="post">
 商品コード：<input type="text" th:field="*{code}">
<BR />
商品名：<input type="text" th:field="*{name}">
<BR />
 説明 ：<input type="text" th:field="*{description}">
<BR />
価格：<input type="text" th:field="*{price}">
<BR />
評価：<input type="text" th:field="*{evaluation}">
<BR />
<input type="submit" value="登録"/>
<BR />
</form>
</body>
</html>
update_product.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<form th:action="@{/show_result}" th:object="${productForm}" method="post">
 商品コード：<input type="text" th:field="*{code}">
<BR />
商品名：<input type="text" th:field="*{name}">
<BR />
 説明 ：<input type="text" th:field="*{description}">
<BR />
価格：<input type="text" th:field="*{price}">
<BR />
評価：<input type="text" th:field="*{evaluation}">
<BR />
<input type="submit" value="更新"/>
<BR />
</form>
</body>
</html>
delete_product.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
<form th:action="@{/afeter_delete_product}" th:object="${productForm}" method="post">
 商品コード：<input type="text" th:field="*{code}">
<BR />
<input type="submit" value="削除"/>
<BR />
</form>
</body>
</html>
after_delete_product.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
</body>
</html>
show_result.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Spring-Shopsite</title>
</head>
<body>
<p th:text="${message}"></p>
</body>
</html>

以上のテンプレートファイルをsrc/main/resources配下のtemplatesに格納します。

#おわりに

あとはプロジェクトをビルドすれば正常に実行されるはずです。今回の
プロジェクトでは残念ながら、商品の画像は取り扱いできませんが、基本的な機能だけは押さえたつもりです。
もしかしたら、このプロジェクトの続きをやることになるかもしれませんが、その時はまたよろしくお願いいたします。
それではまたお会いしましょう。

#ついでに

念のためpomも載せておきます。

pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.1.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>Sample-1</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>Sample-1</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web-services</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
    
</project>
5
4
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
Sign upLogin
5
4

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?