Stept 6 (UPDATE)

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

@@ -53,7 +53,12 @@ public class EmployeeDAO {
 		List<EmployeeDTO> rtnList = new ArrayList<>();
 		StringBuilder sql = new StringBuilder();
 		sql.append(" SELECT ");
-		sql.append("    " + "*");
+		sql.append("    " + ID_EMPLOYEE + ",");
+		sql.append("    " + NM_EMPLOYEE + ",");
+		sql.append("    " + KN_EMPLOYEE + ",");
+		sql.append("    " + MAIL_ADDRESS + ",");
+		sql.append("    " + PASSWORD + ",");
+		sql.append("    " + ID_DEPARTMENT);
 		sql.append(" FROM ");
 		sql.append("    " + TBL_NAME);
 		try {
@@ -61,9 +66,15 @@ 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),
-						rs.getString(KN_EMPLOYEE), rs.getString(MAIL_ADDRESS), rs.getString(PASSWORD),
-						rs.getInt(ID_DEPARTMENT));
+				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));
+
+				// dto ကို List ထဲသို့ ထည့်ရပါမည်
 				rtnList.add(dto);
 			}
 		} finally {
@@ -72,156 +83,114 @@ public class EmployeeDAO {
 		return rtnList;
 	}
 
-	/**
-	 * 社員テーブルから社員IDに合致する情報を取得する
-	 * @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 {
+	//use selectById make the method 
+	public List<EmployeeDTO> selectById(int empId) throws SQLException, ClassNotFoundException {
+		//calling to DTO and new inout array
 		List<EmployeeDTO> rtnList = new ArrayList<>();
+		//(StringBuilder) ကို သုံးခြင်းသည် Code များကို ဖတ်ရလွယ်ကူစေရန်၊ ပြင်ဆင်ရလွယ်ကူစေရန်
 		StringBuilder sql = new StringBuilder();
+		//append မသုံးရင်စာ‌ကြောင်းပိုရှဉ္လို့ append နဲံရေး
 		sql.append(" SELECT ");
-		sql.append("    " + "*");
+		sql.append("    " + ID_EMPLOYEE + ",");
+		sql.append("    " + NM_EMPLOYEE + ",");
+		sql.append("    " + KN_EMPLOYEE + ",");
+		sql.append("    " + MAIL_ADDRESS + ",");
+		sql.append("    " + PASSWORD + ",");
+		sql.append("    " + ID_DEPARTMENT);
 		sql.append(" FROM ");
 		sql.append("    " + TBL_NAME);
 		sql.append(" WHERE ");
-		sql.append("    " + ID_EMPLOYEE);
-		sql.append(" = ");
-		sql.append("    " + id);
-		try {
+		sql.append("    " + ID_EMPLOYEE + " = ? ");
 
+		try {
 			this.stmt = con.prepareStatement(sql.toString());
+			this.stmt.setInt(1, empId);
 			rs = 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));
 
-				EmployeeDTO dto = new EmployeeDTO(rs.getInt(ID_EMPLOYEE), rs.getString(NM_EMPLOYEE),
-						rs.getString(KN_EMPLOYEE), rs.getString(MAIL_ADDRESS), rs.getString(PASSWORD),
-						rs.getInt(ID_DEPARTMENT));
 				rtnList.add(dto);
-
 			}
 		} finally {
 			DbUtil.closeStatement(this.stmt);
 		}
-		if (rtnList.size() == 0) {
-			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 {
+//Delete method 
+	public void empDelete(int empId) throws  ClassNotFoundException, SQLException {
 		StringBuilder sql = new StringBuilder();
-		sql.append(" DELETE ");
-		sql.append(" FROM ");
+		sql.append(" DELETE FROM ");
 		sql.append("    " + TBL_NAME);
 		sql.append(" WHERE ");
-		sql.append("    " + ID_EMPLOYEE);
-		sql.append(" = ");
-		sql.append("    " + id);
-
+		sql.append("    " + ID_EMPLOYEE + " = ? ");
+//for check 
 		try {
 			this.stmt = con.prepareStatement(sql.toString());
-			stmt.executeUpdate();
-			System.out.println("削除が完了しました");
+			this.stmt.setInt(1, empId);
+			this.stmt.executeUpdate();
 		} 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 {
+	public void empInsert (String nmemp, String knname,String mail, String pw, int deptId) throws  ClassNotFoundException, SQLException{
 		StringBuilder sql = new StringBuilder();
-		sql.append(" INSERT ");
-		sql.append(" INTO ");
+		sql.append("INSERT 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 + " ) ");
+		sql.append(" ( ");
+		
+		sql.append("    " + NM_EMPLOYEE + ",");
+		sql.append("    " + KN_EMPLOYEE + ",");
+		sql.append("    " + MAIL_ADDRESS + ",");
+		sql.append("    " + PASSWORD + ",");
+		sql.append("    " + ID_DEPARTMENT);
+		sql.append(" ) ");
+		sql.append(" VALUES (?, ?, ?, ?, ?) ");
 	
 		try {
 			this.stmt = con.prepareStatement(sql.toString());
-			stmt.executeUpdate();
-			System.out.println("登録が完了しました");
+			this.stmt.setString(1, nmemp);
+			this.stmt.setString(2, knname);
+			this.stmt.setString(3, mail);
+			this.stmt.setString(4, pw);
+			this.stmt.setInt(5, deptId);
+
+			this.stmt.executeUpdate();
 		} 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 {
+	public void empUpdate (String nmemp, String knname,String mail, String pw, int deptId,int empId) throws  ClassNotFoundException, SQLException{
 		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("    " + NM_EMPLOYEE + " = ?, ");
+		sql.append("    " + KN_EMPLOYEE + " = ?, ");
+		sql.append("    " + MAIL_ADDRESS + " = ?, ");
+		sql.append("    " + PASSWORD + " = ?, ");
+		sql.append("    " + ID_DEPARTMENT + " = ? ");
 		sql.append(" WHERE ");
-		sql.append("    " + ID_EMPLOYEE);
-		sql.append(" = ");
-		sql.append("    " + id);
+		sql.append("    " + ID_EMPLOYEE + " = ? ");
 	
 		try {
 			this.stmt = con.prepareStatement(sql.toString());
-			stmt.executeUpdate();
-			System.out.println("更新が完了しました");
+			this.stmt.setString(1, nmemp);
+			this.stmt.setString(2, knname);
+			this.stmt.setString(3, mail);
+			this.stmt.setString(4, pw);
+			this.stmt.setInt(5, deptId);
+			this.stmt.setInt(6, empId);
+
+			this.stmt.executeUpdate();
 		} finally {
 			DbUtil.closeStatement(this.stmt);
 		}

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

@@ -1,79 +0,0 @@
-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() {
-
-	}
-
-	public EmployeeDTO(int ID_EMPLOYEE, String NM_EMPLOYEE, String KN_EMPLOYEE, String MAIL_ADDRESS, String PASSWORD,
-			int ID_DEPARTMENT) {
-		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() {
-		return ID_EMPLOYEE;
-	}
-
-	public void setID_EMPLOYEE(int iD_EMPLOYEE) {
-		ID_EMPLOYEE = iD_EMPLOYEE;
-	}
-
-	public String getNM_EMPLOYEE() {
-		return NM_EMPLOYEE;
-	}
-
-	public void setNM_EMPLOYEE(String nM_EMPLOYEE) {
-		NM_EMPLOYEE = nM_EMPLOYEE;
-	}
-
-	public String getKN_EMPLOYEE() {
-		return KN_EMPLOYEE;
-	}
-
-	public void setKN_EMPLOYEE(String kN_EMPLOYEE) {
-		KN_EMPLOYEE = kN_EMPLOYEE;
-	}
-
-	public String getMAIL_ADDRESS() {
-		return MAIL_ADDRESS;
-	}
-
-	public void setMAIL_ADDRESS(String mAIL_ADDRESS) {
-		MAIL_ADDRESS = mAIL_ADDRESS;
-	}
-
-	public String getPASSWORD() {
-		return PASSWORD;
-	}
-
-	public void setPASSWORD(String pASSWORD) {
-		PASSWORD = pASSWORD;
-	}
-
-	public int getID_DEPARTMENT() {
-		return 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 +54,13 @@ public class Main {
 			empSelect();
 			break;
 		case "2":
-			empInsert​();
+			empInsert();
 			break;
 		case "3":
-			empUpdate​();
+			empUpdate();
 			break;
 		case "4":
-			empDelete​();
+			empDelete();
 			break;
 		case "9":
 			return;
@@ -73,88 +73,62 @@ 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 {
+	private void empUpdate() throws ClassNotFoundException, SQLException{
+		// TODO 自動生成されたメソッド・スタブ
 		Connection con = DbUtil.getConnection();
 		EmployeeDAO empDao = new EmployeeDAO(con);
-		int id = Integer.parseInt(inputCheck("ID", true));
 
-		if (empDao.selectById​(id).size() == 0) {
+		try {
+			// ID ရိုက်ထည့်ခိုင်းခြင်း
+			String strId = inputCheck("ID", true);
+			int id = Integer.parseInt(strId);
+
+			// ID ရှိမရှိ စစ်ဆေးခြင်း (selectById ကို သုံးပါ)
+			List<EmployeeDTO> empList = empDao.selectById(id);
+			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");
 				return;
 			}
+
+			// အချက်အလက် အသစ်များ တောင်းခံခြင်း
 			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);
+			String strDeptId = inputCheck("部署ID", true);
+			int deptId = Integer.parseInt(strDeptId);
+
+			// DB ထဲသို့ ပြင်ဆင်ချက် ထည့်သွင်းခြင်း
+			empDao.empUpdate(name, kana, mail, pass, deptId,id);
+			System.out.println("更新が完了しました");
+
 		} 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 {
+	
+
+	public static void empInsert() throws ClassNotFoundException, SQLException {
 		Connection con = DbUtil.getConnection();
 		EmployeeDAO empDao = new EmployeeDAO(con);
 
+		try {
+			// အချက်အလက်များ အသီးသီး တောင်းခံခြင်း (inputCheck ကို သုံးပါ)
 			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);
-		}
+			// 部署ID အတွက် Numerical Check ဖြစ်သည့် true ထည့်ပါမည်
+			String strDeptId = inputCheck("部署ID", true);
+			int deptId = Integer.parseInt(strDeptId);
 
-	}
+			// DB ထဲသို့ ထည့်သွင်းခြင်း
+			empDao.empInsert(name, kana, mail, pass, deptId);
+			System.out.println("登録が完了しました");
 
-	/**
-	 * 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);
 		}
@@ -167,6 +141,7 @@ 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);
@@ -175,16 +150,64 @@ public class Main {
 		try {
 			switch (select) {
 			case "1":
+				//empList = empDao.selectAll();
 				empList = empDao.selectAll();
 				break;
 			case "2":
-				empList = empDao.selectById​(Integer.parseInt(inputCheck("ID", true)));
-				break;
+				// inputCheck 方法ကို သုံးပြီး ID ရိုက်ခိုင်းပါ (数値 check အတွက် true ထည့်ပါ)
+				String strId = inputCheck("ID", true);
+				int id = Integer.parseInt(strId);
+				empList = empDao.selectById(id);
+		;
+
 			default:
 				return;
 			}
+
+			// ရှာဖွေတွေ့ရှိခြင်း မရှိပါက
+			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");
+				return;
+			}
+
 			for (EmployeeDTO emp : empList) {
-				emp.showInfo();
+				//for (String emp : empList) {
+				//System.out.println(emp);
+				System.out.println(emp.getIdEmployee() + "\t" +
+						emp.getNmEmployee() + "\t" +
+						emp.getKnEmployee() + "\t" +
+						emp.getMailAddress() + "\t" +
+						emp.getPassword() + "\t" +
+						emp.getIdDepartment());
+			}
+		} finally {
+			DbUtil.closeConnection(empDao.con);
+		}
+	}
+
+		public static void empDelete() throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		EmployeeDAO empDao = new EmployeeDAO(con);
+
+		try {
+			// ID ရိုက်ထည့်ခိုင်းခြင်း (inputCheck ကို သုံးပါ)
+			String strId = inputCheck("ID", true);
+			int id = Integer.parseInt(strId);
+			//System.out.println("IDを入力してください");
+
+			// ID ရှိမရှိ စစ်ဆေးခြင်း (selectById ကို သုံးပါ)
+			List<EmployeeDTO> empList = empDao.selectById(id);
+			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");
+				return;
+			}
+
+			// ဖျက်ရန် အတည်ပြုချက် (Confirmation) တောင်းခြင်း
+			System.out.println("指定されたIDの情報を削除します？ Y/y");
+			String confirm = sc.nextLine();
+			if ("Y".equalsIgnoreCase(confirm)) {
+				empDao.empDelete(id);
+				System.out.println("削除が完了しました");
 			}
 		}finally {
 			DbUtil.closeConnection(empDao.con);
@@ -241,25 +264,6 @@ 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）
@@ -43,16 +42,18 @@ public class DbUtil {
 	 * 例外			：ClassNotFoundException, SQLException
 	 * 処理			：JDBCドライバを読み込み後、DB接続する。
 	 * 				  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
+	 * 				  ※Connection生成には上記の定数を活用してくださ
 	 */
 
 	public static Connection getConnection() throws ClassNotFoundException, SQLException {
-		if (con != null && con.isValid(1)) {
+		//connection is null or not null and create new 
+		if (con == null || con.isClosed()) {
+			Class.forName(DB_DRIVER);
+			con = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
+		}
 		return con;
 	}
-		Class.forName(DB_DRIVER);
-		return con = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
-	}
+	
 	
 	/*
 	 * TODO 以下の仕様でメソッドを作成してください。
@@ -63,10 +64,12 @@ 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
 	 */
+	public static void closeStatement(PreparedStatement stmt) throws SQLException {
+		if (stmt != null) {
+			stmt.close();
+			
+		}
 	
-	public static void closeStatement(PreparedStatement ps) throws SQLException {
-		if (Objects.nonNull(ps))
-			ps.close();
 	}
 
 	/*
@@ -79,8 +82,10 @@ 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 != null) {
 			con.close();
+		
+		}
 	}
 
 }