提出物です

.classpath

@@ -0,0 +1,8 @@
+<?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

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

.project

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

.settings/.jsdtscope

@@ -0,0 +1,7 @@
+<?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

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

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

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

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

@@ -61,170 +61,47 @@ public class EmployeeDAO {
 			this.stmt = con.prepareStatement(sql.toString());
 			rs = stmt.executeQuery();
 			while (rs.next()) {
-				EmployeeDTO dto = new EmployeeDTO(rs.getInt(ID_EMPLOYEE), rs.getString(NM_EMPLOYEE),
+				EmployeeDTO dto = new EmployeeDTO();
-						rs.getString(KN_EMPLOYEE), rs.getString(MAIL_ADDRESS), rs.getString(PASSWORD),
+				dto.setId_employee(rs.getInt("id_employee"));
-						rs.getInt(ID_DEPARTMENT));
+				dto.setNm_employee(rs.getString("nm_employee"));
+				dto.setKn_employee(rs.getString("kn_employee"));
+				dto.setMail_address(rs.getString("mail_address"));
+				dto.setPassword(rs.getString("password"));
+				dto.setId_department(rs.getInt("id_department"));
 				rtnList.add(dto);
 			}
 		} finally {
-			DbUtil.closeStatement(this.stmt);
+			DbUtil.closestatement(this.stmt);
 		}
 		return rtnList;
 	}
 
-	/**
+	public List<EmployeeDTO> selectById(int id_employee) throws SQLException, ClassNotFoundException {
-	 * 社員テーブルから社員IDに合致する情報を取得する
+		List<EmployeeDTO> rtnList2 = new ArrayList<>();
-	 * @param id
-	 * 			検索する社員ID
-	 * @return 検索結果
-	 * @throws SQLException
-	 * @throws ClassNotFoundException
-	 * @throws NumberFormatException
-	 */
-	public List<EmployeeDTO> selectById​(int id)
-			throws SQLException, ClassNotFoundException, NumberFormatException {
-		List<EmployeeDTO> rtnList = new ArrayList<>();
 		StringBuilder sql = new StringBuilder();
 		sql.append(" SELECT ");
 		sql.append("    " + "*");
 		sql.append(" FROM ");
 		sql.append("    " + TBL_NAME);
-		sql.append(" WHERE ");
+		sql.append(" WHERE " + ID_EMPLOYEE+ "=?");
-		sql.append("    " + ID_EMPLOYEE);
-		sql.append(" = ");
-		sql.append("    " + id);
 		try {
 
 			this.stmt = con.prepareStatement(sql.toString());
 			rs = stmt.executeQuery();
 			while (rs.next()) {
-
+				EmployeeDTO dto = new EmployeeDTO();
-				EmployeeDTO dto = new EmployeeDTO(rs.getInt(ID_EMPLOYEE), rs.getString(NM_EMPLOYEE),
+				dto.setId_employee(rs.getInt("id_employee"));
-						rs.getString(KN_EMPLOYEE), rs.getString(MAIL_ADDRESS), rs.getString(PASSWORD),
+				dto.setNm_employee(rs.getString("nm_employee"));
-						rs.getInt(ID_DEPARTMENT));
+				dto.setKn_employee(rs.getString("kn_employee"));
-				rtnList.add(dto);
+				dto.setMail_address(rs.getString("mail_address"));
-
+				dto.setPassword(rs.getString("password"));
+				dto.setId_department(rs.getInt("id_department"));
+				rtnList2.add(dto);
 			}
 		} finally {
-			DbUtil.closeStatement(this.stmt);
+			DbUtil.closestatement(this.stmt);
 		}
-		if (rtnList.size() == 0) {
+		return rtnList2;
-			System.out.println("入力された値で情報がみつかりませんでした");
-		}
-		return rtnList;
 	}
 
-	/**
-	 * 社員テーブルの社員IDに合致する情報を削除する
-	 *
-	 * @param id
-	 *			削除ID
-	 * @throws ClassNotFoundException
-	 * @throws SQLException
-	 * @throws NumberFormatException
-	 */
-	public void empDelete​(int id)
-			throws ClassNotFoundException, SQLException, NumberFormatException {
-		StringBuilder sql = new StringBuilder();
-		sql.append(" DELETE ");
-		sql.append(" FROM ");
-		sql.append("    " + TBL_NAME);
-		sql.append(" WHERE ");
-		sql.append("    " + ID_EMPLOYEE);
-		sql.append(" = ");
-		sql.append("    " + id);
-
-		try {
-			this.stmt = con.prepareStatement(sql.toString());
-			stmt.executeUpdate();
-			System.out.println("削除が完了しました");
-		} finally {
-			DbUtil.closeStatement(this.stmt);
-		}
-
-	}
-
-	/**
-	 * 社員テーブルに指定された情報を新規登録する
-	 *
-	 * @param name - 社員名
-	 * @param kana - 社員名カナ
-	 * @param mail - メールアドレス
-	 * @param pass - パスワード
-	 * @param depId - 部署ID
-	 * @throws NumberFormatException
-	 * @throws SQLException
-	 * @throws ClassNotFoundException
-	 */
-	public void empInsert​(String name, String kana, String mail, String pass, int depId)
-			throws NumberFormatException, SQLException, ClassNotFoundException {
-		StringBuilder sql = new StringBuilder();
-		sql.append(" INSERT ");
-		sql.append(" INTO ");
-		sql.append("    " + TBL_NAME);
-		sql.append(" ( " + NM_EMPLOYEE);
-		sql.append(" , " + KN_EMPLOYEE);
-		sql.append(" , " + MAIL_ADDRESS);
-		sql.append(" , " + PASSWORD);
-		sql.append(" , " + ID_DEPARTMENT + " ) ");
-		sql.append(" VALUES ");
-		sql.append(" ( '" + name);
-		sql.append("' , '" + kana);
-		sql.append("' , '" + mail);
-		sql.append("' , '" + pass);
-		sql.append("' , " + depId + " ) ");
-
-		try {
-			this.stmt = con.prepareStatement(sql.toString());
-			stmt.executeUpdate();
-			System.out.println("登録が完了しました");
-		} finally {
-			DbUtil.closeStatement(this.stmt);
-		}
-	}
-
-	/**
-	 * 社員テーブルの社員IDに合致する情報を更新する
-	 *
-	 * @param id - 社員ID
-	 * @param name - 社員名
-	 * @param kana - 社員名カナ
-	 * @param mail - メールアドレス
-	 * @param pass - パスワード
-	 * @param depId - 部署ID
-	 * @throws ClassNotFoundException
-	 * @throws SQLException
-	 * @throws NumberFormatException
-	
-	 */
-	public void empUpdate​(int id, String name, String kana, String mail, String pass, int depId)
-			throws ClassNotFoundException, SQLException, NumberFormatException {
-		StringBuilder sql = new StringBuilder();
-		sql.append(" UPDATE ");
-		sql.append("    " + TBL_NAME);
-		sql.append(" SET ");
-		sql.append("    " + NM_EMPLOYEE);
-		sql.append(" = '" + name + " ' ");
-		sql.append(" , " + KN_EMPLOYEE);
-		sql.append(" = '" + kana + " ' ");
-		sql.append(" , " + MAIL_ADDRESS);
-		sql.append(" = '" + mail + " ' ");
-		sql.append(" , " + PASSWORD);
-		sql.append(" = '" + pass + " ' ");
-		sql.append(" , " + ID_DEPARTMENT);
-		sql.append(" = " + depId);
-		sql.append(" WHERE ");
-		sql.append("    " + ID_EMPLOYEE);
-		sql.append(" = ");
-		sql.append("    " + id);
-
-		try {
-			this.stmt = con.prepareStatement(sql.toString());
-			stmt.executeUpdate();
-			System.out.println("更新が完了しました");
-		} finally {
-			DbUtil.closeStatement(this.stmt);
-		}
-
-	}
 }

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

@@ -1,79 +1,69 @@
 package com.rhizome.example.dto;
 
 public class EmployeeDTO {
-	private int ID_EMPLOYEE;
-	private String NM_EMPLOYEE;
-	private String KN_EMPLOYEE;
-	private String MAIL_ADDRESS;
-	private String PASSWORD;
-	private int ID_DEPARTMENT;
 
-	public EmployeeDTO() {
+	private Integer id_employee;
+	private String nm_employee;
+	private String kn_employee;
+	private String mail_address;
+	private String password;
+	private Integer id_department;
 
+	public Integer getId_employee() {
+		return id_employee;
 	}
 
-	public EmployeeDTO(int ID_EMPLOYEE, String NM_EMPLOYEE, String KN_EMPLOYEE, String MAIL_ADDRESS, String PASSWORD,
+	public void setId_employee(Integer id_employee) {
-			int ID_DEPARTMENT) {
+		this.id_employee = id_employee;
-		setID_EMPLOYEE(ID_EMPLOYEE);
-		setNM_EMPLOYEE(NM_EMPLOYEE);
-		setKN_EMPLOYEE(KN_EMPLOYEE);
-		setMAIL_ADDRESS(MAIL_ADDRESS);
-		setPASSWORD(PASSWORD);
-		setID_DEPARTMENT(ID_DEPARTMENT);
 	}
 
-	public int getID_EMPLOYEE() {
+	public String getNm_employee() {
-		return ID_EMPLOYEE;
+		return nm_employee;
 	}
 
-	public void setID_EMPLOYEE(int iD_EMPLOYEE) {
+	public void setNm_employee(String nm_employee) {
-		ID_EMPLOYEE = iD_EMPLOYEE;
+		this.nm_employee = nm_employee;
 	}
 
-	public String getNM_EMPLOYEE() {
+	public String getKn_employee() {
-		return NM_EMPLOYEE;
+		return kn_employee;
 	}
 
-	public void setNM_EMPLOYEE(String nM_EMPLOYEE) {
+	public void setKn_employee(String kn_employee) {
-		NM_EMPLOYEE = nM_EMPLOYEE;
+		this.kn_employee = kn_employee;
 	}
 
-	public String getKN_EMPLOYEE() {
+	public String getMail_address() {
-		return KN_EMPLOYEE;
+		return mail_address;
 	}
 
-	public void setKN_EMPLOYEE(String kN_EMPLOYEE) {
+	public void setMail_address(String mail_address) {
-		KN_EMPLOYEE = kN_EMPLOYEE;
+		this.mail_address = mail_address;
 	}
 
-	public String getMAIL_ADDRESS() {
+	public String getPassword() {
-		return MAIL_ADDRESS;
+		return password;
 	}
 
-	public void setMAIL_ADDRESS(String mAIL_ADDRESS) {
+	public void setPassword(String password) {
-		MAIL_ADDRESS = mAIL_ADDRESS;
+		this.password = password;
 	}
 
-	public String getPASSWORD() {
+	public Integer getId_department() {
-		return PASSWORD;
+		return id_department;
 	}
 
-	public void setPASSWORD(String pASSWORD) {
+	public void setId_department(Integer id_department) {
-		PASSWORD = pASSWORD;
+		this.id_department = id_department;
 	}
 
-	public int getID_DEPARTMENT() {
+	public String toString() {
-		return ID_DEPARTMENT;
+		return id_employee + "\t"
-	}
+				+ nm_employee + "\t"
+				+ kn_employee + "\t"
+				+ mail_address + "\t"
+				+ password + "\t"
+				+ id_department;
 
-	public void setID_DEPARTMENT(int iD_DEPARTMENT) {
-		ID_DEPARTMENT = iD_DEPARTMENT;
 	}
-
-	public void showInfo() {
-		System.out.println(ID_EMPLOYEE + "\t" + NM_EMPLOYEE +
-				"\t" + KN_EMPLOYEE + "\t" + MAIL_ADDRESS +
-				"\t" + PASSWORD + "\t" + ID_DEPARTMENT);
-	}
-
 }

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

@@ -54,13 +54,10 @@ public class Main {
 			empSelect();
 			break;
 		case "2":
-			empInsert​();
 			break;
 		case "3":
-			empUpdate​();
 			break;
 		case "4":
-			empDelete​();
 			break;
 		case "9":
 			return;
@@ -73,93 +70,6 @@ public class Main {
 		}
 	}
 
-	/**
-	 * 社員テーブルの社員IDに合致する情報を更新する
-	 *
-	 * @throws ClassNotFoundException
-	 * @throws SQLException
-	 * @throws NumberFormatException
-	 */
-	public static void empUpdate​()
-			throws ClassNotFoundException, SQLException, NumberFormatException {
-		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
-		int id = Integer.parseInt(inputCheck("ID", true));
-
-		if (empDao.selectById​(id).size() == 0) {
-			return;
-		}
-		String name = inputCheck("社員名", false);
-		String kana = inputCheck("フリガナ", false);
-		String mail = inputCheck("メールアドレス", false);
-		String pass = inputCheck("パスワード", false);
-		int depId = Integer.parseInt(inputCheck("部署ID", true));
-
-		try {
-			empDao.empUpdate​(id, name, kana, mail, pass, depId);
-		} finally {
-			DbUtil.closeConnection(empDao.con);
-		}
-	}
-
-	/**
-	 * 社員テーブルに指定された情報を新規登録する
-	 * @throws NumberFormatException
-	 * @throws SQLException
-	 * @throws ClassNotFoundException
-	 */
-	public static void empInsert​()
-			throws NumberFormatException, SQLException, ClassNotFoundException {
-		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
-
-		String name = inputCheck("社員名", false);
-		String kana = inputCheck("フリガナ", false);
-		String mail = inputCheck("メールアドレス", false);
-		String pass = inputCheck("パスワード", false);
-		int depId = Integer.parseInt(inputCheck("部署ID", true));
-
-		try {
-			empDao.empInsert​(name, kana, mail, pass, depId);
-		} finally {
-			DbUtil.closeConnection(empDao.con);
-		}
-
-	}
-
-	/**
-	 * 社員テーブルの社員IDに合致する情報を削除する
-	 *
-	 * @throws ClassNotFoundException
-	 * @throws SQLException
-	 */
-	public static void empDelete​()
-			throws ClassNotFoundException, SQLException, NumberFormatException {
-		List<EmployeeDTO> rtnList = new ArrayList<>();
-		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
-		int id = Integer.parseInt(inputCheck("ID", true));
-		rtnList = empDao.selectById​(id);
-		if (rtnList.size() == 0) {
-			return;
-		}
-
-		System.out.println("指定されたIDの情報を削除します？ Y/y\r\n"
-				+ "（Y/y以外の入力であればキャンセル）");
-
-		String str = inputCheck(false);
-
-		if (!str.equalsIgnoreCase("y")) {
-			System.out.println("キャンセルしました");
-			return;
-		}
-		try {
-			empDao.empDelete​(id);
-		} finally {
-			DbUtil.closeConnection(empDao.con);
-		}
-	}
-
 	/**
 	 * 社員テーブルから情報を検索する
 	 *
@@ -178,13 +88,15 @@ public class Main {
 				empList = empDao.selectAll();
 				break;
 			case "2":
-				empList = empDao.selectById​(Integer.parseInt(inputCheck("ID", true)));
+				System.out.println("IDを入力してください");
+				
+				empList = empDao.selectById(tblFlg);
 				break;
 			default:
 				return;
 			}
 			for (EmployeeDTO emp : empList) {
-				emp.showInfo();
+				System.out.println(emp);
 			}
 		} finally {
 			DbUtil.closeConnection(empDao.con);
@@ -240,26 +152,4 @@ public class Main {
 		}
 		return str;
 	}
-
-	public static String inputCheck(boolean flg) {
-		String str = null;
-		while (true) {
-			str = sc.nextLine();
-			if (str.trim().length() == 0) {
-
-				continue;
-			}
-			if (flg) {
-				if (str.trim().length() > 0) {
-					try {
-						Integer.parseInt(str);
-					} catch (NumberFormatException e) {
-						continue;
-					}
-				}
-			}
-			break;
-		}
-		return str;
-	}
 }

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

@@ -4,7 +4,6 @@ import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
-import java.util.Objects;
 
 public class DbUtil {
 	// 定数定義（共通）
@@ -45,13 +44,10 @@ 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
 	 */
-
+	public static Connection getConnection() throws SQLException {
-	public static Connection getConnection() throws ClassNotFoundException, SQLException {
+		//データベースの接続
-		if (con != null && con.isValid(1)) {
+		con = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
-			return con;
+		return con;
-		}
-		Class.forName(DB_DRIVER);
-		return con = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
 	}
 
 	/*
@@ -64,9 +60,11 @@ public class DbUtil {
 	 * 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
 	 */
 
-	public static void closeStatement(PreparedStatement ps) throws SQLException {
+	public static void closestatement(PreparedStatement stmt) throws SQLException {
-		if (Objects.nonNull(ps))
+		if (!stmt.equals(null)) {
-			ps.close();
+			//DBステートメントを閉じる
+			stmt.close();
+		}
 	}
 
 	/*
@@ -79,8 +77,8 @@ public class DbUtil {
 	 * 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 {
-		if (Objects.nonNull(con))
+		if (!con.equals(null)) {
 			con.close();
+		}
 	}
-
 }