７段階目まで完了済

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

@@ -0,0 +1,200 @@
+package com.rhizome.example.dao;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+import com.rhizome.example.dto.DepartmentDTO;
+import com.rhizome.example.util.DbUtil;
+
+public class DepartmentDAO {
+	private static final String TBL_NAME = "department";
+	private static final String ID_DEPARTMENT = "id_department";
+	private static final String NM_DEPARTMENT = "nm_department";
+	
+	/** DBコネクション */
+	public Connection con;
+	/** DBステートメント */
+	PreparedStatement stmt;
+	/** 検索結果 */
+	ResultSet rs;
+
+	/**
+	 * インスタンス生成時DBコネクション
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public DepartmentDAO(Connection con) {
+		this.con = con;
+	}
+
+	/**
+	 * 部署テーブルの情報を全件取得する
+	 *
+	 * @return 検索結果
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public List<DepartmentDTO> selectAll() throws SQLException, ClassNotFoundException {
+		List<DepartmentDTO> 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()) {
+				DepartmentDTO Department = new DepartmentDTO();
+				Department.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+				Department.setNmDepartment(rs.getString(NM_DEPARTMENT));
+				rtnList.add(Department);
+			}
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+		return rtnList;
+	}
+
+	/**
+	 * 部署テーブルから指定された部署IDに一致するデータを全件取得する
+	 *
+	 * @return 検索結果
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public List<DepartmentDTO> selectById(int idDepartment) throws SQLException, ClassNotFoundException {
+		List<DepartmentDTO> 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_DEPARTMENT + " = " + "?");
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			stmt.setInt(1,idDepartment);
+			rs = stmt.executeQuery();
+			int nRecords = 0;
+			while (rs.next()) {
+				DepartmentDTO Department = new DepartmentDTO();
+				Department.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+				Department.setNmDepartment(rs.getString(NM_DEPARTMENT));
+				rtnList.add(Department);
+				nRecords++;
+			}
+			if (nRecords==0) {
+				System.out.println("入力された値で情報がみつかりませんでした");
+			}
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+		return rtnList;
+	}
+
+	/**
+	 * 部署テーブルから指定された部署IDに一致する部署名を取得する
+	 *
+	 * @return 部署名
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public String getNmDepartment(int idDepartment) throws SQLException, ClassNotFoundException {
+		String name = Integer.toString(idDepartment);  // 部署名が見つからない場合は部署IDを返却する
+		Connection con = DbUtil.getConnection();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		if(depDao.selectById(idDepartment).size()!=0) {
+			DepartmentDTO department = depDao.selectById(idDepartment).get(0);
+			name = department.getNmDepartment();
+		};
+		return name;
+	}
+
+	/**
+	 * 部署テーブルから指定された部署IDに一致するデータを削除する
+	 *
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public void depDelete(int idDepartment) throws SQLException, ClassNotFoundException {
+		if (selectById(idDepartment).size()!=0) {
+			StringBuilder sql = new StringBuilder();
+			sql.append(" DELETE FROM ");
+			sql.append("    " + TBL_NAME);
+			sql.append(" WHERE ");
+			sql.append("    " + ID_DEPARTMENT + " = " + "?");
+			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）");
+			Scanner sc = new Scanner(System.in);
+			String flag = sc.nextLine();
+			if (flag.equals("Y")||flag.equals("y")) {
+				try {
+					this.stmt = con.prepareStatement(sql.toString());
+					stmt.setInt(1,idDepartment);
+					stmt.executeUpdate();
+					System.out.println("削除が完了しました");
+				}  finally {
+					DbUtil.closeStatement(this.stmt);
+				}
+			}
+		} 
+	}
+
+	/**
+	 * 部署テーブルに指定された情報を新規登録する
+	 *
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public void depInsert(String name) throws SQLException, ClassNotFoundException {
+		StringBuilder sql = new StringBuilder();
+		sql.append(" INSERT INTO ");
+		sql.append("    " + TBL_NAME);
+		sql.append(" ("+NM_DEPARTMENT+") ");
+		sql.append(" VALUES ");
+		sql.append(" ( ? ) ");
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			stmt.setString(1,name);
+			stmt.executeUpdate();
+			System.out.println("登録が完了しました");
+		}  finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+	}
+
+	/**
+	 * 部署テーブルの指定された部署IDに一致するデータを引数の内容に更新する
+	 *
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public void depUpdate(int idDepartment, String name) throws SQLException, ClassNotFoundException {
+		if (selectById(idDepartment).size()!=0) {
+			StringBuilder sql = new StringBuilder();
+			sql.append(" UPDATE ");
+			sql.append("    " + TBL_NAME);
+			sql.append(" SET ");
+			sql.append(" "+NM_DEPARTMENT+" = ?"+" "); 
+			sql.append(" WHERE ");
+			sql.append("    " + ID_DEPARTMENT + " = " + "?");
+			try {
+				this.stmt = con.prepareStatement(sql.toString());
+				stmt.setString(1,name);
+				stmt.setInt(2,idDepartment);
+				stmt.executeUpdate();
+				System.out.println("更新が完了しました");
+			}  finally {
+				DbUtil.closeStatement(this.stmt);
+			}
+		}
+	}
+
+}

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

@@ -0,0 +1,27 @@
+package com.rhizome.example.dto;
+
+public class DepartmentDTO {
+
+	private int idDepartment;
+	private String nmDepartment;
+
+	public int getIdDepartment() {
+		return idDepartment;
+	}
+	public void setIdDepartment(int idDepartment) {
+		this.idDepartment = idDepartment;
+	}
+	public String getNmDepartment() {
+		return nmDepartment;
+	}
+	public void setNmDepartment(String nmDepartment) {
+		this.nmDepartment = nmDepartment;
+	}
+
+	@Override
+	public String toString() {
+		return this.getIdDepartment() + "	"
+			  +this.getNmDepartment();
+	}
+
+}

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

@@ -0,0 +1,406 @@
+package com.rhizome.example.main;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+import com.rhizome.example.dao.DepartmentDAO;
+import com.rhizome.example.dao.EmployeeDAO;
+import com.rhizome.example.dto.DepartmentDTO;
+import com.rhizome.example.dto.EmployeeDTO;
+import com.rhizome.example.util.DbUtil;
+
+/**
+ * @author IT-College
+ * @version 1.0
+ */
+public class MainNew {
+	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
+	 */
+	static int tblFlg = 0;
+
+	/**
+	 * 処理開始位置
+	 *
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		System.out.println("システムを開始します");
+		while (true) {
+			try {
+				new MainNew().start();
+			} catch (Exception e) {
+				System.out.println("予期せぬエラーが発生しました");
+				e.printStackTrace();
+			}
+		}
+	}
+
+	/**
+	 * 処理選択を行う
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public void start() throws ClassNotFoundException, SQLException {
+		System.out.println();
+		System.out.println("現在のメンテナンス対象テーブル：" + targetTableName(tblFlg));
+		System.out.println("1:検索 2:登録 3:更新 4:削除 9:テーブル切替 0:終了");
+		String ope = sc.nextLine();
+		switch (ope) {
+		case "1":
+			Select(tblFlg);
+			break;
+		case "2":
+			Insert(tblFlg);
+			break;
+		case "3":
+			Update(tblFlg);
+			break;
+		case "4":
+			Delete(tblFlg);
+			break;
+		case "9":
+			tblFlg = ChangeTable(tblFlg);
+			break;
+		case "0":
+			System.out.println("システムを終了します");
+			System.exit(0);
+		default:
+			System.out.println("指定の番号を入力してください");
+			break;
+		}
+	}
+
+	/**
+	 * 社員テーブルから情報を検索する
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public static void empSelect() throws ClassNotFoundException, SQLException {
+		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");
+		String select = sc.nextLine();
+		try {
+			switch (select) {
+			case "1":
+				empList = empDao.selectAll();
+				break;
+			case "2":
+				empList = empDao.selectById(Integer.parseInt(inputCheck("社員ID", true)));
+				break;
+			default:
+				return;
+			}
+			for (EmployeeDTO emp : empList) {
+				System.out.println(emp);
+				//System.out.println(toStringEmployee(emp));  // 出力文字調整：ongoing
+			}
+		} finally {
+			DbUtil.closeConnection(empDao.con);
+		}
+	}
+
+	/**
+	 * 部署テーブルから情報を検索する
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public static void depSelect() throws ClassNotFoundException, SQLException {
+		List<DepartmentDTO> depList = new ArrayList<>();
+		Connection con = DbUtil.getConnection();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		System.out.println("1:全検索 2:条件検索 それ以外:戻る");
+		String select = sc.nextLine();
+		try {
+			switch (select) {
+			case "1":
+				depList = depDao.selectAll();
+				break;
+			case "2":
+				depList = depDao.selectById(Integer.parseInt(inputCheck("部署ID", true)));
+				break;
+			default:
+				return;
+			}
+			for (DepartmentDTO dep : depList) {
+				System.out.println(dep);
+				//System.out.println(toStringDepartment(dep));  // 出力文字調整：ongoing
+			}
+		} finally {
+			DbUtil.closeConnection(depDao.con);
+		}
+	}
+
+	/**
+	 * フラグを判定し、テーブル名を取得する
+	 *
+	 * @param tblFlg
+	 *            テーブル名判定用フラグ
+	 * @return テーブル名
+	 */
+	public static String targetTableName(int tblFlg) {
+		String rtnTblName = "";
+		if (tblFlg == 0) {
+			rtnTblName = "社員テーブル";
+		} else {
+			rtnTblName = "部署テーブル";
+		}
+		return rtnTblName;
+	}
+
+	/**
+	 * フラグを判定し、検索機能を呼び出す
+	 *
+	 * @param tblFlg
+	 *            テーブル名判定用フラグ
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public static void Select(int tblFlg) throws ClassNotFoundException, SQLException {
+		if (tblFlg == 0) {
+			empSelect();
+		} else {
+			depSelect();
+		}
+	}
+
+	/**
+	 * フラグを判定し、登録機能を呼び出す
+	 *
+	 * @param tblFlg
+	 *            テーブル名判定用フラグ
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public static void Insert(int tblFlg) throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		if (tblFlg == 0) {
+			EmployeeDAO empDao = new EmployeeDAO(con);
+			empDao.empInsert(inputCheck("社員名", false),
+					 		 inputCheck("フリガナ", false),
+					 		 inputCheck("メールアドレス", false),
+					 		 inputCheck("パスワード", false),
+					 		 inputCheckIdDepartmentRep());  // 部署IDと照合できるまで入力を受け付ける
+		} else {
+			DepartmentDAO depDao = new DepartmentDAO(con);
+			depDao.depInsert(inputCheck("部署名", false));
+		}
+	}
+
+	/**
+	 * フラグを判定し、更新機能を呼び出す
+	 *
+	 * @param tblFlg
+	 *            テーブル名判定用フラグ
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public static void Update(int tblFlg) throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		if (tblFlg == 0) {
+			EmployeeDAO empDao = new EmployeeDAO(con);
+			int id = Integer.parseInt(inputCheck("社員ID", true));
+			if (empDao.selectById(id).size()==0) {}  // 社員IDの照合に失敗した場合は更新処理を行わない
+			else {
+				empDao.empUpdate(id,
+							 	 inputCheck("社員名", false),
+							 	 inputCheck("フリガナ", false),
+							 	 inputCheck("メールアドレス", false),
+							 	 inputCheck("パスワード", false),
+							 	 inputCheckIdDepartmentRep());  // 部署IDと照合できるまで入力を受け付ける
+			}
+		} else {
+			DepartmentDAO depDao = new DepartmentDAO(con);
+			int id = Integer.parseInt(inputCheck("部署ID", true));
+			if (depDao.selectById(id).size()==0) {}  // 部署IDの照合に失敗した場合は更新処理を行わない
+			else {
+				depDao.depUpdate(id,
+							 	 inputCheck("部署名", false));
+			}
+		}
+	}
+
+	/**
+	 * フラグを判定し、削除機能を呼び出す
+	 *
+	 * @param tblFlg
+	 *            テーブル名判定用フラグ
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 */
+	public static void Delete(int tblFlg) throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		if (tblFlg == 0) {
+			EmployeeDAO empDao = new EmployeeDAO(con);
+			empDao.empDelete(Integer.parseInt(inputCheck("社員ID", true)));  // 社員IDの照合に失敗した場合は削除処理を行わない
+		} else {
+			DepartmentDAO depDao = new DepartmentDAO(con);
+			depDao.depDelete(Integer.parseInt(inputCheck("部署ID", true)));  // 部署IDの照合に失敗した場合は削除処理を行わない
+		}
+	}
+	
+	/**
+	 * テーブルを切り替える
+	 *
+	 * @param tblFlg
+	 *            テーブル名判定用フラグ
+	 * @return 変更後フラグ
+	 */
+	public static int ChangeTable(int tblFlg) {
+		if (tblFlg == 0) {
+			tblFlg = 1;
+		} else {
+			tblFlg = 0;
+		}
+		return tblFlg;
+	}
+
+	/**
+	 * 入力値を判定し、返却する
+	 *
+	 * @param titleName
+	 *            入力項目名
+	 * @param flg
+	 *            数値チェック可否フラグ
+	 * @return
+	 */
+	public static String inputCheck(String titleName, boolean flg) {
+		String str = null;
+		while (true) {
+			System.out.println(titleName + "を入力してください");
+			str = sc.nextLine();
+			if (str.trim().length() == 0) {
+				System.out.println(titleName + "は入力必須です。");
+				continue;
+			}
+			if (flg) {
+				if (str.trim().length() > 0) {
+					try {
+						Integer.parseInt(str);
+					} catch (NumberFormatException e) {
+						System.out.println(titleName + "は数値入力です");
+						continue;
+					}
+				}
+			}
+			break;
+		}
+		return str;
+	}
+
+	/**
+	 * 入力値と社員IDを照合し、返却する（照合できるまで入力を受け付ける）
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 * @return
+	 */
+	public static int inputCheckIdEmployeeRep() throws ClassNotFoundException, SQLException {
+		int id;
+		Connection con = DbUtil.getConnection();
+		EmployeeDAO empDao = new EmployeeDAO(con);
+		while (true) {
+			id = Integer.parseInt(inputCheck("社員ID", true));
+			if (empDao.selectById(id).size()!=0) {
+				break;
+			}
+		}
+		return id;
+	}
+
+	/**
+	 * 入力値と部署IDを照合し、返却する（照合できるまで入力を受け付ける）
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 * @return
+	 */
+	public static int inputCheckIdDepartmentRep() throws ClassNotFoundException, SQLException {
+		int id;
+		Connection con = DbUtil.getConnection();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		while (true) {
+			id = Integer.parseInt(inputCheck("部署ID", true));
+			if (depDao.selectById(id).size()!=0) {
+				break;
+			}
+		}
+		return id;
+	}
+
+	/**
+	 * 社員テーブルの出力文字列を生成する
+	 * ・縦の線が揃うように位置を調整する
+	 * ・部署IDを部署名に変更する
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 * @return 出力文字列
+	 */
+	public static String toStringEmployee(EmployeeDTO employee) throws ClassNotFoundException, SQLException {
+		Connection con = DbUtil.getConnection();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		return fixCharCount(8, employee.getIdEmployee())
+			  +fixCharCountFull(8, employee.getNmEmployee())
+			  +fixCharCountFull(12, employee.getKnEmployee())
+			  +fixCharCount(20,	employee.getMailaddress())
+			  +fixCharCount(12, employee.getPassword())
+			  +fixCharCountFull(8, depDao.getNmDepartment(employee.getIdDepartment()));
+	}
+
+	/**
+	 * 部署テーブルの出力文字列を生成する
+	 * ・縦の線が揃うように位置を調整する
+	 * 
+	 *
+	 * @throws ClassNotFoundException
+	 * @throws SQLException
+	 * @return 出力文字列
+	 */
+	public static String toStringDepartment(DepartmentDTO department) throws ClassNotFoundException, SQLException {
+		return fixCharCount(8, department.getIdDepartment())
+			  +fixCharCountFull(12, department.getNmDepartment());
+	}
+
+	/**
+	 * 入力文字列の文字数が一定になるように空白を追加する（半角文字／数字／全角文字）
+	 *
+	 * @return 
+	 */
+	public static String fixCharCount(int nChars, String input) {
+		if (nChars-input.length()>=0) {
+			for (int i=0; i<nChars-input.length(); i++) {
+				input = input + " ";
+			}
+		}
+		return input;
+	}
+	public static String fixCharCount(int nChars, int id) {
+		String input = Integer.toString(id);
+		if (nChars-input.length()>=0) {
+			for (int i=0; i<nChars-input.length(); i++) {
+				input = input + " ";
+			}
+		}
+		return input;
+	}
+	public static String fixCharCountFull(int nChars, String input) {
+		if (nChars-input.length()>=0) {
+			System.out.println(nChars-input.length());
+			for (int i=0; i<nChars-input.length(); i++) {
+				input = input + "　";
+			}
+		}
+		return input;
+	}
+
+}