1030自主学習

.classpath

@@ -1,10 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
-		<attributes>
-			<attribute name="module" value="true"/>
-		</attributes>
-	</classpathentry>
+	<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"/>

.project

@@ -6,18 +6,18 @@
 	</projects>
 	<buildSpec>
 		<buildCommand>
-			<name>org.eclipse.wst.validation.validationbuilder</name>
+			<name>org.eclipse.jdt.core.javabuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
 		<buildCommand>
-			<name>org.eclipse.jdt.core.javabuilder</name>
+			<name>org.eclipse.wst.validation.validationbuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
 	</natures>
 </projectDescription>

sql/CreateTable-MySQL.sql

@@ -37,3 +37,4 @@ INSERT INTO department (nm_department) VALUES ('経理部');
 INSERT INTO department (nm_department) VALUES ('システム開発事業部');
 INSERT INTO department (nm_department) VALUES ('教育事業部');
 INSERT INTO department (nm_department) VALUES ('営業企画部');
+

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

@@ -7,25 +7,30 @@
 package com.rhizome.example.dao;
 
 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 com.rhizome.example.dto.EmployeeDTO;
-//import com.rhizome.example.main.EmployeeDTO;
-//実行結果をDTOに格納し、リストに追加
+import com.rhizome.example.util.DbUtil;
 
 public class EmployeeDAO {
+	private static final String TBL_NAME = "employee";
+	private static final String ID_EMPLOYEE = "id_employee";
+	private static final String NM_EMPLOYEE = "nm_employee";
+	private static final String KN_EMPLOYEE = "kn_employee";
+	private static final String MAIL_ADDRESS = "mail_address";
+	private static final String PASSWORD = "password";
+	private static final String ID_DEPARTMENT = "id_department";
 
 	/** DBコネクション */
-	//public Connection con;
+	public Connection con;
 	/** DBステートメント */
-	//PreparedStatement stmt;
+	PreparedStatement stmt;
 	/** 検索結果 */
-	//ResultSet rs;
+	ResultSet rs;
 
 	/**
 	 * インスタンス生成時DBコネクション
@@ -33,9 +38,9 @@ public class EmployeeDAO {
 	 * @throws ClassNotFoundException
 	 * @throws SQLException
 	 */
-	//public EmployeeDAO(Connection con) {
-		//this.con = con;
-	//}
+	public EmployeeDAO(Connection con) {
+		this.con = con;
+	}
 
 	/**
 	 * 社員テーブルの情報を全件取得する
@@ -46,116 +51,140 @@ public class EmployeeDAO {
 	 */
 	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 {
 
-		Connection con = null;
-        Statement stmt = null;
-        
-		
-        try {
-            // JDBCドライバの読み込み
-            Class.forName("com.mysql.cj.jdbc.Driver");
-
-            // Connectionの生成 
-            con = DriverManager.getConnection(
-                "jdbc:mysql://127.0.0.1:3306/rezodb", // データベース
-                "rezouser",                           // ユーザ名
-                "Rezo_0000"                           // パスワード
-            );
-            
-            String sql = "SELECT * FROM employee";
-            stmt = con.createStatement();
-            ResultSet rs = stmt.executeQuery(sql);
-
-            // 実行結果をDTOに格納し、リストに追加
+			this.stmt = con.prepareStatement(sql.toString());
+			rs = stmt.executeQuery();
 			while (rs.next()) {
 				EmployeeDTO emp = new EmployeeDTO();
+				emp.setId(rs.getInt("id_employee"));
+                emp.setName(rs.getString("nm_employee"));
+                emp.setKana(rs.getString("kn_employee"));
+                emp.setEmail(rs.getString("mail_address"));
+                emp.setPass(rs.getString("password"));
+                emp.setIdDep(rs.getInt("id_department"));
                 
-				emp.setId_employee(rs.getInt("id_employee"));
-				emp.setNm_employee(rs.getString("nm_employee"));
-				emp.setKn_employee(rs.getString("kn_employee"));
-				emp.setMail_address(rs.getString("mail_address"));
-				emp.setPassword(rs.getString("password"));
-				emp.setId_department(rs.getInt("id_department"));
-
-				rtnList.add(emp);
+                rtnList.add(emp);
 			}
-			
-		} catch (ClassNotFoundException | SQLException e) {
-            e.printStackTrace();
-        } finally {
-            // Statement、Connectionの切断
-            try {
-                if (stmt != null) stmt.close();
-                if (con != null) con.close();
-            } catch (SQLException e) {
-                e.printStackTrace();
-            }
-        }
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
 		return rtnList;
 	}
 
-	//IDによる条件検索
-	public java.util.List<EmployeeDTO> selectById​(int id) throws SQLException, ClassNotFoundException, NumberFormatException{
+	//指定されたIDの社員データを取得する
+	public  List<EmployeeDTO> selectById(int id_employee)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 ");
+		sql.append(" ID_EMPLOYEE = ?");
 		
-		Connection con = null;
-        Statement stmt = null;
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			this.stmt.setInt(1,id_employee );
+			rs = stmt.executeQuery();
+			while (rs.next()) {
+				EmployeeDTO emp = new EmployeeDTO();
+				emp.setId(rs.getInt("id_employee"));
+                emp.setName(rs.getString("nm_employee"));
+                emp.setKana(rs.getString("kn_employee"));
+                emp.setEmail(rs.getString("mail_address"));
+                emp.setPass(rs.getString("password"));
+                emp.setIdDep(rs.getInt("id_department"));
                 
-        try {
-            // JDBCドライバの読み込み
-            Class.forName("com.mysql.cj.jdbc.Driver");
-
-            // Connectionの生成 
-            con = DriverManager.getConnection(
-                "jdbc:mysql://127.0.0.1:3306/rezodb", // データベース
-                "rezouser",                           // ユーザ名
-                "Rezo_0000"                           // パスワード
-            );
-            
-            String sql = "SELECT id_employee FROM employee WHERE id_employee";
-            stmt = con.createStatement();
-            ResultSet rs = stmt.executeQuery(sql);
-            
-         // 実行結果をDTOに格納し、リストに追加
-         			while (rs.next()) {
-         				EmployeeDTO emp = new EmployeeDTO();
-         				
-         				emp.setId_employee(rs.getInt("id_employee"));
-         				emp.setNm_employee(rs.getString("nm_employee"));
-         				emp.setKn_employee(rs.getString("kn_employee"));
-         				emp.setMail_address(rs.getString("mail_address"));
-         				emp.setPassword(rs.getString("password"));
-         				emp.setId_department(rs.getInt("id_department"));
-
-         				rtnList.add(emp);
-         			}
-         			
-         			List<EmployeeDTO> selectList = new ArrayList<>();
-
-         			for (EmployeeDTO employee : rtnList) {
-         				if (employee.getPrimaryKeyValue().equals(id)) {
-         					selectList.add(employee);
-         				}
-         			}
-
-         			return selectList;
-            
-         			
-         			
-        } catch (ClassNotFoundException | SQLException e) {
-        e.printStackTrace();
-        } finally {
-        // Statement、Connectionの切断
-        	try {
-        		if (stmt != null) stmt.close();
-        		if (con != null) con.close();
-        	} catch (SQLException e) {
-        		e.printStackTrace();
-        	}
-        }
+                rtnList.add(emp);
+			}
+		}finally {
+			DbUtil.closeStatement(this.stmt);
+		}
 		return rtnList;
-       }
-		
 	}
 	
+	//指定された社員のデータを削除する
+	public  void empDelete(int id_employee)throws SQLException, ClassNotFoundException{
+		//SQL文の作成
+		StringBuilder sql = new StringBuilder();
+		sql.append(" DELETE ");
+		sql.append("    ");
+		sql.append(" FROM ");
+		sql.append("    " + TBL_NAME);
+		sql.append(" WHERE ");
+		sql.append(" ID_EMPLOYEE = ?");
 		
+		try {
+			//SQL文の組み立て結果を保存
+			this.stmt = con.prepareStatement(sql.toString());
+			//?に代入
+			this.stmt.setInt(1,id_employee );
+			//削除命令
+			stmt.executeUpdate();
+	}finally {
+		DbUtil.closeStatement(this.stmt);
+	}
+}
+	
+	public  void empInsert(String name, String kana, String email, 
+			String password, Integer idDep)throws SQLException, ClassNotFoundException{
+		StringBuilder sql = new StringBuilder();
+		sql.append(" INSERT ");
+		sql.append("    " + " INTO ");
+		sql.append("    " + TBL_NAME);
+		sql.append(" ( ");
+		sql.append("    " + NM_EMPLOYEE + ", " + KN_EMPLOYEE + ", " +
+		MAIL_ADDRESS + ", " + PASSWORD + ", " + ID_DEPARTMENT);
+		sql.append(" ) ");
+
+		sql.append(" VALUES ");
+		sql.append("    ( ?, ?, ?, ?, ?)  "); 
+		
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			this.stmt.setString(1,name );
+			this.stmt.setString(2,kana );
+			this.stmt.setString(3,email );
+			this.stmt.setString(4,password );
+			this.stmt.setInt(5,idDep );
+			stmt.executeUpdate();
+		}finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+	}
+	
+	public void empUpdate(Integer id, String name, String kana, String email, 
+			String password, Integer idDep)throws SQLException, ClassNotFoundException{
+		StringBuilder sql = new StringBuilder();
+		sql.append(" UPDATE ");
+		sql.append("    " + TBL_NAME);
+		sql.append(" SET ");
+		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 + "= ?");
+		
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			this.stmt.setString(1,name );
+			this.stmt.setString(2,kana );
+			this.stmt.setString(3,email );
+			this.stmt.setString(4,password );
+			this.stmt.setInt(5,idDep );
+			this.stmt.setInt(6, id);
+			stmt.executeUpdate();
+		}finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+	}
+	
+}

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

@@ -1,60 +1,47 @@
 package com.rhizome.example.dto;
 
 public class EmployeeDTO {
+	private Integer id;
+    private String name;
+    private String kana;
+    private String email;
+    private String pass;
+    private Integer idDep;
     
-	//Employeeテーブルのカラム分のフィールド
-	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 Integer getId() {
+		return id;
 	}
-	public void setId_employee(Integer id_employee) {
-		this.id_employee = id_employee;
+	public void setId(Integer id) {
+		this.id = id;
 	}
-	public String getNm_employee() {
-		return nm_employee;
+	public String getName() {
+		return name;
 	}
-	public void setNm_employee(String nm_employee) {
-		this.nm_employee = nm_employee;
+	public void setName(String name) {
+		this.name = name;
 	}
-	public String getKn_employee() {
-		return kn_employee;
+	public String getKana() {
+		return kana;
 	}
-	public void setKn_employee(String kn_employee) {
-		this.kn_employee = kn_employee;
+	public void setKana(String kana) {
+		this.kana = kana;
 	}
-	public String getMail_address() {
-		return mail_address;
+	public String getEmail() {
+		return email;
 	}
-	public void setMail_address(String mail_address) {
-		this.mail_address = mail_address;
+	public void setEmail(String email) {
+		this.email = email;
 	}
-	public String getPassword() {
-		return password;
+	public String getPass() {
+		return pass;
 	}
-	public void setPassword(String password) {
-		this.password = password;
+	public void setPass(String pass) {
+		this.pass = pass;
 	}
-	public Integer getId_department() {
-		return id_department;
+	public Integer getIdDep() {
+		return idDep;
 	}
-	public void setId_department(Integer id_department) {
-		this.id_department = id_department;
+	public void setIdDep(Integer idDep) {
+		this.idDep = idDep;
 	}
-	public Object getPrimaryKeyValue() {
-		// TODO 自動生成されたメソッド・スタブ
-		return null;
-	}
-	
-
-	
-	
-	
-
 }

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

@@ -54,10 +54,13 @@ public class Main {
 			empSelect();
 			break;
 		case "2":
+			empInsert();
 			break;
 		case "3":
+			empUpdate();
 			break;
 		case "4":
+			empDelete();
 			break;
 		case "9":
 			return;
@@ -79,7 +82,7 @@ public class Main {
 	public static void empSelect() throws ClassNotFoundException, SQLException {
 		List<EmployeeDTO> empList = new ArrayList<>();
 		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO();
+		EmployeeDAO empDao = new EmployeeDAO(con);
 		System.out.println("1:全検索 2:条件検索 それ以外:戻る");
 		String select = sc.nextLine();
 		try {
@@ -88,23 +91,23 @@ public class Main {
 				empList = empDao.selectAll();
 				break;
 			case "2":
-				String id = sc.nextLine();//IDを入力
-				int num = Integer.valueOf(id);//String型のIDをint型に変換
-				empList = empDao.selectById​(num);
+				String strId =inputCheck("ID", true);
+				int ID = Integer.parseInt(strId);
+				empList = empDao.selectById(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.getId_employee() + "\t" 
-                        + emp.getNm_employee() + "\t" 
-                        + emp.getKn_employee() + "\t"
-                        + emp.getMail_address() + "\t" 
-                        + emp.getPassword() + "\t" 
-                        + emp.getId_department());
+				System.out.println(emp.getId() + "\t" + emp.getName() + "\t" + 
+					emp.getKana() + "\t" + emp.getEmail() + "\t" + emp.getPass() + "\t" + emp.getIdDep());
+			}
 			}
 		} finally {
-			DbUtil.closeConnection();
+			DbUtil.closeConnection(empDao.con);
 		}
 	}
 
@@ -133,9 +136,6 @@ public class Main {
 	 * @param flg
 	 *            数値チェック可否フラグ
 	 * @return
-	 * @throws SQLException 
-	 * @throws ClassNotFoundException 
-	 * @throws NumberFormatException 
 	 */
 	public static String inputCheck(String titleName, boolean flg) {
 		String str = null;
@@ -155,11 +155,86 @@ public class Main {
 						continue;
 					}
 				}
-				
 			}
-		
 			break;
 		}
 		return str;
 	}
+	
+	public static void empDelete() throws ClassNotFoundException, SQLException {
+		//リスト作成
+		List<EmployeeDTO> empList = new ArrayList<>();
+		//DB接続
+		Connection con = DbUtil.getConnection();
+		//DAOインスタンス生成
+		EmployeeDAO empDao = new EmployeeDAO(con);
+		try {
+			//入力された文字列をdelIdに保存
+			String delId =inputCheck("ID", true);
+			//入力された文字列を整数に変換して保存
+			int ID = Integer.parseInt(delId);
+			//入力されたIDに一致するデータを保存
+			empList = empDao.selectById(ID);
+			//リストが空＝一致なし
+			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 {
+				System.out.println("指定されたIDの情報を削除します？ Y/y");
+				//削除の同意受付
+				String agr = sc.nextLine();
+				//同意が得られたら
+				if("Y".equals(agr) || "y".equals(agr)) {
+					//削除メソッド実行し削除
+					empDao.empDelete(ID);
+					System.out.println("削除が完了しました");
+				}
+			}
+		}finally {
+			DbUtil.closeConnection(empDao.con);
+		}
+	}
+	
+	public static void empInsert() throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		EmployeeDAO empDao = new EmployeeDAO(con);
+		try {
+			String name = inputCheck("社員名",false);
+			String kana = inputCheck("フリガナ", false);
+			String email = inputCheck("メールアドレス", false);
+			String password = inputCheck("パスワード", false);
+			String depId = inputCheck("部署ID", true);
+			int dID = Integer.parseInt(depId);
+			
+			empDao.empInsert(name,kana,email,password,dID);
+			System.out.println("登録が完了しました");
+	}finally {
+		DbUtil.closeConnection(empDao.con);
+		}
+	}
+	public static void empUpdate() throws ClassNotFoundException, SQLException{
+		List<EmployeeDTO> empList = new ArrayList<>();
+		Connection con = DbUtil.getConnection();
+		EmployeeDAO empDao = new EmployeeDAO(con);
+		try {
+			String delId =inputCheck("ID", true);
+			int ID = Integer.parseInt(delId);
+			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;
+			}
+			
+			String name = inputCheck("社員名",false);
+			String kana = inputCheck("フリガナ", false);
+			String email = inputCheck("メールアドレス", false);
+			String password = inputCheck("パスワード", false);
+			String depId = inputCheck("部署ID", true);
+			int dID = Integer.parseInt(depId);
+			
+			empDao.empUpdate(ID,name,kana,email,password,dID);
+			System.out.println("更新が完了しました");
+		}finally {
+			DbUtil.closeConnection(empDao.con);
+		}
+	}
 }

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

@@ -5,7 +5,6 @@ import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
 
-
 public class DbUtil {
 	// 定数定義（共通）
 	private static final String DB_HOST = "127.0.0.1";
@@ -45,26 +44,15 @@ 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
 	 */
-	//DB接続用メソッドを作成する
-	public static Connection getConnection() throws ClassNotFoundException {
-			//データベースの接続オブジェクトを初期化
-			Connection con = null;
-            // JDBCドライバの読み込み
-            Class.forName("com.mysql.cj.jdbc.Driver");
-
-            // Connectionの生成
-            try {
-				con = DriverManager.getConnection(
-				    "jdbc:mysql://127.0.0.1:3306/rezodb" // データベース
-				    , "rezouser" // ユーザ
-				    , "Rezo_0000" // パスワード
-				);
-			} catch (SQLException e) {
-                e.printStackTrace();
-            }
-           return con;
-     }
-	
+		public static Connection getConnection() throws ClassNotFoundException, SQLException{
+			Class.forName("com.mysql.cj.jdbc.Driver");
+			con = DriverManager.getConnection(
+					"jdbc:mysql://127.0.0.1:3306/rezodb",
+					"rezouser",
+					"Rezo_0000"
+					);
+			return con;
+		}
 
 	/*
 	 * TODO 以下の仕様でメソッドを作成してください。
@@ -75,15 +63,11 @@ 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 = null;
-		try {
-            if (stmt != null) stmt.close();
-        } catch (SQLException e) {
-            e.printStackTrace();
-        }
-		
-	}
+		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。
@@ -94,12 +78,10 @@ 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() {
-		try {
-            if (con != null) con.close();
-        } catch (SQLException e) {
-            e.printStackTrace();
-        }
-	}
+		public static void closeConnection(Connection con) throws SQLException{
+			if(con != null) {
+				con.close();
+			}
+		}
 
 }