4段階目（DAOのデータ削除メソッドを作成→削除処理完成）

.classpath

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="lib" path="lib/mysql-connector-java-8.0.23.jar"/>
-	<classpathentry kind="lib" path="実行例/DAO_Simple.jar"/>
-	<classpathentry kind="output" path="bin"/>
-</classpath>

.gitignore

@@ -1 +0,0 @@
-/bin/

.project

@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<projectDescription>
-	<name>em-jdbc</name>
-	<comment></comment>
-	<projects>
-	</projects>
-	<buildSpec>
-		<buildCommand>
-			<name>org.eclipse.jdt.core.javabuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.wst.validation.validationbuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-	</buildSpec>
-	<natures>
-		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
-		<nature>org.eclipse.jdt.core.javanature</nature>
-	</natures>
-</projectDescription>

.settings/.jsdtscope

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.JRE_CONTAINER"/>
-	<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.baseBrowserLibrary"/>
-	<classpathentry kind="src" path=""/>
-	<classpathentry kind="output" path=""/>
-</classpath>

.settings/org.eclipse.wst.jsdt.ui.superType.container

@@ -1 +0,0 @@
-org.eclipse.wst.jsdt.launching.JRE_CONTAINER

.settings/org.eclipse.wst.jsdt.ui.superType.name

@@ -1 +0,0 @@
-Global

src/com/rhizome/example/dao/EmployeeDAO.java

@@ -13,6 +13,7 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 
+import com.rhizome.example.dto.EmployeeDTO;
 import com.rhizome.example.util.DbUtil;
 
 public class EmployeeDAO {
@@ -48,20 +49,27 @@ public class EmployeeDAO {
 	 * @throws SQLException
 	 * @throws ClassNotFoundException
 	 */
-	public List<String> selectAll() throws SQLException, ClassNotFoundException {
-		List<String> rtnList = new ArrayList<>();
+	public List<EmployeeDTO> selectAll() throws SQLException, ClassNotFoundException {
+		List<EmployeeDTO> rtnList = new ArrayList<>();
 		StringBuilder sql = new StringBuilder();
 		sql.append(" SELECT ");
 		sql.append("    " + "*");
 		sql.append(" FROM ");
 		sql.append("    " + TBL_NAME);
 		try {
-	
+
 			this.stmt = con.prepareStatement(sql.toString());
 			rs = stmt.executeQuery();
 			while (rs.next()) {
-//				EmployeeDAO dao = new EmployeeDAO(con);
-				rtnList.add(rs.getString(NM_EMPLOYEE));
+				EmployeeDTO dto = new EmployeeDTO();
+				dto.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+				dto.setNmEmployee(rs.getString(NM_EMPLOYEE));
+				dto.setKnEmployee(rs.getString(KN_EMPLOYEE));
+				dto.setMailAddress(rs.getString(MAIL_ADDRESS));
+				dto.setPassword(rs.getString(PASSWORD));
+				dto.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+
+				rtnList.add(dto);
 			}
 		} finally {
 			DbUtil.closeStatement(this.stmt);
@@ -69,4 +77,50 @@ public class EmployeeDAO {
 		return rtnList;
 	}
 
+	public List<EmployeeDTO> selectById(int id) throws SQLException, ClassNotFoundException {
+		List<EmployeeDTO> rtnList = new ArrayList<>();
+		StringBuilder sql = new StringBuilder();
+		sql.append(" SELECT ");
+		sql.append(" * ");
+		sql.append(" FROM ");
+		sql.append(TBL_NAME);
+		sql.append(" WHERE ID_EMPLOYEE = ? ");
+		try {
+
+			this.stmt = con.prepareStatement(sql.toString());
+			this.stmt.setInt(1, id);
+			rs = this.stmt.executeQuery();
+			while (rs.next()) {
+				EmployeeDTO dto = new EmployeeDTO();
+				dto.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+				dto.setNmEmployee(rs.getString(NM_EMPLOYEE));
+				dto.setKnEmployee(rs.getString(KN_EMPLOYEE));
+				dto.setMailAddress(rs.getString(MAIL_ADDRESS));
+				dto.setPassword(rs.getString(PASSWORD));
+				dto.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+
+				rtnList.add(dto);
+			}
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+		return rtnList;
+	}
+
+	//社員データ削除
+	public void empDelete(int id) throws SQLException {
+		StringBuilder sql = new StringBuilder();
+		sql.append(" DELETE ");
+		sql.append(" FROM ");
+		sql.append(TBL_NAME);
+		sql.append(" WHERE ID_EMPLOYEE = ? ");
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			this.stmt.setInt(1, id);
+			this.stmt.executeUpdate();
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+
+		}
+	}
 }

src/com/rhizome/example/dto/EmployeeDTO.java

@@ -0,0 +1,59 @@
+package com.rhizome.example.dto;
+
+public class EmployeeDTO {
+	private int idEmployee;
+	private String nmEmployee;
+	private String knEmployee;
+	private String mailAddress;
+	private String password;
+	private int idDepartment;
+
+	public int getIdEmployee() {
+		return idEmployee;
+	}
+
+	public void setIdEmployee(int idEmployee) {
+		this.idEmployee = idEmployee;
+	}
+
+	public String getNmEmployee() {
+		return nmEmployee;
+	}
+
+	public void setNmEmployee(String nmEmployee) {
+		this.nmEmployee = nmEmployee;
+	}
+
+	public String getKnEmployee() {
+		return knEmployee;
+	}
+
+	public void setKnEmployee(String knEmployee) {
+		this.knEmployee = knEmployee;
+	}
+
+	public String getMailAddress() {
+		return mailAddress;
+	}
+
+	public void setMailAddress(String mailAddress) {
+		this.mailAddress = mailAddress;
+	}
+
+	public String getPassword() {
+		return password;
+	}
+
+	public void setPassword(String password) {
+		this.password = password;
+	}
+
+	public int getIdDepartment() {
+		return idDepartment;
+	}
+
+	public void setIdDepartment(int idDepartment) {
+		this.idDepartment = idDepartment;
+	}
+
+}

src/com/rhizome/example/main/Main.java

@@ -7,6 +7,7 @@ import java.util.List;
 import java.util.Scanner;
 
 import com.rhizome.example.dao.EmployeeDAO;
+import com.rhizome.example.dto.EmployeeDTO;
 import com.rhizome.example.util.DbUtil;
 
 /**
@@ -15,7 +16,6 @@ import com.rhizome.example.util.DbUtil;
  */
 public class Main {
 	static Scanner sc = new Scanner(System.in);
-	
 	/**
 	 * テーブル切り替え用変数 0：Employeeテーブル 1：Departmentテーブル
 	 */
@@ -58,6 +58,7 @@ public class Main {
 		case "3":
 			break;
 		case "4":
+			empDelete();
 			break;
 		case "9":
 			return;
@@ -70,7 +71,6 @@ public class Main {
 		}
 	}
 
-
 	/**
 	 * 社員テーブルから情報を検索する
 	 *
@@ -78,7 +78,7 @@ public class Main {
 	 * @throws SQLException
 	 */
 	public static void empSelect() throws ClassNotFoundException, SQLException {
-		List<String> empList = new ArrayList<>();
+		List<EmployeeDTO> empList = new ArrayList<>();
 		Connection con = DbUtil.getConnection();
 		EmployeeDAO empDao = new EmployeeDAO(con);
 		System.out.println("1:全検索 2:条件検索 それ以外:戻る");
@@ -88,17 +88,57 @@ public class Main {
 			case "1":
 				empList = empDao.selectAll();
 				break;
+			case "2":
+				String id = inputCheck("ID", true);
+				empList = empDao.selectById(Integer.parseInt(id));
+				break;
 			default:
 				return;
 			}
+			if (empList.isEmpty()) {
+				System.out.println("入力された値で情報がみつかりませんでした");
+			} else {
+				for (EmployeeDTO emp : empList) {
+					System.out.println(
+							emp.getIdEmployee() + " "
+									+ emp.getNmEmployee() + " "
+									+ emp.getKnEmployee() + " "
+									+ emp.getMailAddress() + " "
+									+ emp.getPassword() + " "
+									+ emp.getIdDepartment());
+				}
+			}
 
-			System.out.println("取得件数" + empList.size());
-			
-			for (String emp : empList) {
-				System.out.println(emp);
+		} finally {
+			DbUtil.closeConnection(empDao.con);
+		}
+	}
+
+	//社員テーブルから情報を削除する
+	public static void empDelete()
+			throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		EmployeeDAO empDao = new EmployeeDAO(con);
+		String id = inputCheck("ID", true);
+
+		try {
+			List<EmployeeDTO> empList = empDao.selectById(Integer.parseInt(id));
+
+			if (empList.isEmpty()) {
+				System.out.println("入力されて値で情報がみつかりませんでした");
+			} else {
+				System.out.println("指定されたIDの情報を削除しますか? Y/y");
+				System.out.println("Y/y以外の入力であればキャンセル");
+
+				String confirm = sc.nextLine();
+
+				if (confirm.equalsIgnoreCase("y")) {
+					empDao.empDelete(Integer.parseInt(id));
+					System.out.println("削除が完了しました");
+				}
 			}
 		} finally {
-			DbUtil.closeConnection(empDao.con); 
+			DbUtil.closeConnection(con);
 		}
 	}
 

src/com/rhizome/example/util/DbUtil.java

@@ -9,8 +9,8 @@ public class DbUtil {
 	// 定数定義（共通）
 	private static final String DB_HOST = "127.0.0.1";
 	private static final String DB_NAME = "rezodb";
-	private static final String DB_USER = "rezouser1";
-	private static final String DB_PASS = "Rezo_0001";
+	private static final String DB_USER = "rezouser";
+	private static final String DB_PASS = "Rezo_0000";
 
 	// 定数定義（PostgreSQL用）
 	// private static final String DBMS = "postgresql";
@@ -44,22 +44,13 @@ public class DbUtil {
 	 * 				  生成されたConnectionを返却する
 	 * 				  ※Connection生成には上記の定数を活用してください
 	 */
-	//例外が2個あるためカンマでつなげることができる
-	public static Connection getConnection() throws SQLException {
-		//データベースへの接続
+	public static Connection getConnection()
+			throws ClassNotFoundException, SQLException {
+		Class.forName(DB_DRIVER);
 		con = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
-			return con;
-	}
-//		try {
-//			Class.forName("com.mysql.cj.jdbc.Driver");
-//		} catch (ClassNotFoundException e) {
-//			throw new SQLException("JDBCドライバが見つかりません", e);
-//		}
-//		//JDBCドライバの読み込み
-//		return DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/rezodb"
-//				, "rezouser1"
-//				, "Rezo_0001");
 
+		return con;
+	}
 
 	/*
 	 * TODO 以下の仕様でメソッドを作成してください。
@@ -70,14 +61,13 @@ public class DbUtil {
 	 * 例外			：SQLException
 	 * 処理			：引数のDBステートメントがnullでない場合、そのDBステートメントをクローズする
 	 */
-	//               PreparedStatement型 / DBステートメント        例外： SQLException
-	public static void closeStatement( PreparedStatement stmt) throws SQLException {
-		//引数のDBステートメントがnullでない場合
-		if(stmt != null) {
-		//そのDBステートメントをクローズする
+	public static void closeStatement(PreparedStatement stmt)
+			throws SQLException {
+		if (stmt != null) {
 			stmt.close();
 		}
 	}
+
 	/*
 	 * TODO 以下の仕様でメソッドを作成してください。
 	 *
@@ -87,10 +77,9 @@ public class DbUtil {
 	 * 例外			：SQLException
 	 * 処理			：引数のコネクションがnullでない場合、そのコネクションを切断する
 	 */
-	public static void closeConnection(Connection con) throws SQLException {
-		//引数のコネクションがnullでない場合
-		if(con != null) {
-		//そのコネクションを切断する
+	public static void closeConnection(Connection con)
+			throws SQLException {
+		if (con != null) {
 			con.close();
 		}
 	}