１０段階目まで完了済

.classpath

@@ -1,12 +1,9 @@
 <?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="mysql-connector-j-8.0.32.jar"/>
 	<classpathentry kind="lib" path="実行例/DAO_Simple.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

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

@@ -0,0 +1,258 @@
+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";
+
+	/** アクセサ */
+	public static String getTblName() {
+		return TBL_NAME;
+	}
+	public static String getIdColumnName() {
+		return ID_DEPARTMENT;
+	}
+	public static String getNmColumnName() {
+		return 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("入力された部署ID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名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> selectByNm(String NmDepartment) 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("    " + NM_DEPARTMENT + " LIKE " + " CONCAT('%',?,'%') ");
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			stmt.setString(1,NmDepartment);
+			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("入力された部署名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 {
+		Connection con = DbUtil.getConnection();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		String name = "";
+		if(depDao.selectById(idDepartment).size()==1) {
+			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(" ( ? ) ");
+		System.out.println("指定された情報を登録しますか？ 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.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 {
+		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 + " = " + "?");
+		System.out.println("指定されたIDの情報を更新しますか？ 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.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/dao/EmployeeDAO.java

@@ -7,25 +7,32 @@
 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 java.util.Scanner;
 
+import com.rhizome.example.dto.DepartmentDTO;
 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 +40,9 @@ 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 +53,377 @@ public class EmployeeDAO {
 	 */
 	public List<EmployeeDTO> selectAll() throws SQLException, ClassNotFoundException {
 		List<EmployeeDTO> rtnList = new ArrayList<>();
-		
-		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
+		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()) {
-				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);
+				EmployeeDTO employee = new EmployeeDTO();
+				employee.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+				employee.setNmEmployee(rs.getString(NM_EMPLOYEE));
+				employee.setKnEmployee(rs.getString(KN_EMPLOYEE));
+				employee.setMailaddress(rs.getString(MAIL_ADDRESS));
+				employee.setPassword(rs.getString(PASSWORD));
+				employee.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+				rtnList.add(employee);
 			}
-			
-		} 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{
+	/**
+	 * 社員テーブルから指定された社員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<EmployeeDTO> selectById(int idEmployee) throws SQLException, ClassNotFoundException {
 		List<EmployeeDTO> rtnList = new ArrayList<>();
-		
-		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 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();
-        	}
-        }
+		StringBuilder sql = new StringBuilder();
+		sql.append(" SELECT ");
+		sql.append("    " + "*");
+		sql.append(" FROM ");
+		sql.append("    " + TBL_NAME);
+		sql.append(" WHERE ");
+		sql.append("    " + ID_EMPLOYEE + " = " + "?");
+		try {
+			this.stmt = con.prepareStatement(sql.toString());
+			stmt.setInt(1,idEmployee);
+			rs = stmt.executeQuery();
+			int nRecords = 0;
+			while (rs.next()) {
+				EmployeeDTO employee = new EmployeeDTO();
+				employee.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+				employee.setNmEmployee(rs.getString(NM_EMPLOYEE));
+				employee.setKnEmployee(rs.getString(KN_EMPLOYEE));
+				employee.setMailaddress(rs.getString(MAIL_ADDRESS));
+				employee.setPassword(rs.getString(PASSWORD));
+				employee.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+				rtnList.add(employee);
+				nRecords++;
+			}
+			if (nRecords==0) {
+				System.out.println("入力された社員IDで情報がみつかりませんでした");
+			}
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
 		return rtnList;
-       }
-		
 	}
 
+	/**
+	 * 社員テーブルから条件に一致するデータを全件取得する(AND検索)
+	 *
+	 * @return 検索結果
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	/**/
+	// 部署ID入力
+	public List<EmployeeDTO> empSelect(int idEmployee, String name, String kn, String mailaddress, String password, int idDepartment) 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 ");
+		if (idEmployee!=0) sql.append("    " + ID_EMPLOYEE + " = " + "?" + "AND");
+		if (name.trim().length()!=0) sql.append("    " + NM_EMPLOYEE + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (kn.trim().length()!=0) sql.append("    " + KN_EMPLOYEE + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (mailaddress.trim().length()!=0) sql.append("    " + MAIL_ADDRESS + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (password.trim().length()!=0) sql.append("    " + PASSWORD + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (idDepartment!=0) sql.append("    " + ID_DEPARTMENT + " = " + "?" + "AND");
+		sql.delete(sql.length()-3, sql.length());  // 末尾"AND"を削除する
+		try {
+			int nConditions = 0;
+			this.stmt = con.prepareStatement(sql.toString());
+			if (idEmployee!=0) stmt.setInt(++nConditions, idEmployee);
+			if (name.trim().length()!=0) stmt.setString(++nConditions, name);
+			if (kn.trim().length()!=0) stmt.setString(++nConditions, kn);
+			if (mailaddress.trim().length()!=0) stmt.setString(++nConditions, mailaddress);
+			if (password.trim().length()!=0) stmt.setString(++nConditions, password);
+			if (idDepartment!=0) stmt.setInt(++nConditions, idDepartment);
+			if (nConditions==0) {
+				System.out.println("情報が入力されていません");
+			} else {
+				rs = stmt.executeQuery();
+				int nRecords = 0;
+				while (rs.next()) {
+					EmployeeDTO employee = new EmployeeDTO();
+					employee.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+					employee.setNmEmployee(rs.getString(NM_EMPLOYEE));
+					employee.setKnEmployee(rs.getString(KN_EMPLOYEE));
+					employee.setMailaddress(rs.getString(MAIL_ADDRESS));
+					employee.setPassword(rs.getString(PASSWORD));
+					employee.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+					rtnList.add(employee);
+					nRecords++;
+				}
+				if (nRecords==0) {
+					System.out.println("入力された社員情報で情報がみつかりませんでした");
+				}
+			}
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+		return rtnList;
+	}
+	// 部署名入力
+	public List<EmployeeDTO> empSelect(int idEmployee, String name, String kn, String mailaddress, String password, String nmDepartment) throws SQLException, ClassNotFoundException {
+		List<EmployeeDTO> rtnList = new ArrayList<>();
+		StringBuilder sql = new StringBuilder();
+		sql.append(" SELECT ");
+		sql.append("    " + "*");
+		sql.append(" FROM ");
+		sql.append("    " + TBL_NAME);
+		if (nmDepartment.trim().length()!=0) {  // テーブル結合
+			sql.append(" INNER JOIN " + DepartmentDAO.getTblName() + " ON ");
+			sql.append(TBL_NAME+"."+ID_DEPARTMENT + " = " + DepartmentDAO.getTblName()+"."+DepartmentDAO.getIdColumnName());
+		}
+		sql.append(" WHERE ");
+		if (idEmployee!=0) sql.append("    " + ID_EMPLOYEE + " = " + "?" + "AND");
+		if (name.trim().length()!=0) sql.append("    " + NM_EMPLOYEE + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (kn.trim().length()!=0) sql.append("    "+KN_EMPLOYEE + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (mailaddress.trim().length()!=0) sql.append("    " + MAIL_ADDRESS + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (password.trim().length()!=0) sql.append("    " + PASSWORD + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		if (nmDepartment.trim().length()!=0) sql.append("    " + DepartmentDAO.getNmColumnName() + " LIKE " + " CONCAT('%',?,'%')" + "AND");
+		sql.delete(sql.length()-3, sql.length());  // 末尾"AND"を削除する
+		try {
+			int nConditions = 0;
+			this.stmt = con.prepareStatement(sql.toString());
+			if (idEmployee!=0) stmt.setInt(++nConditions, idEmployee);
+			if (name.trim().length()!=0) stmt.setString(++nConditions, name);
+			if (kn.trim().length()!=0) stmt.setString(++nConditions, kn);
+			if (mailaddress.trim().length()!=0) stmt.setString(++nConditions, mailaddress);
+			if (password.trim().length()!=0) stmt.setString(++nConditions, password);
+			if (nmDepartment.trim().length()!=0) stmt.setString(++nConditions, nmDepartment);
+			if (nConditions==0) {
+				System.out.println("情報が入力されていません");
+			} else {
+				rs = stmt.executeQuery();
+				int nRecords = 0;
+				while (rs.next()) {
+					EmployeeDTO employee = new EmployeeDTO();
+					employee.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+					employee.setNmEmployee(rs.getString(NM_EMPLOYEE));
+					employee.setKnEmployee(rs.getString(KN_EMPLOYEE));
+					employee.setMailaddress(rs.getString(MAIL_ADDRESS));
+					employee.setPassword(rs.getString(PASSWORD));
+					employee.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+					rtnList.add(employee);
+					nRecords++;
+				}
+				if (nRecords==0) {
+					System.out.println("入力された社員情報で情報がみつかりませんでした");
+				}
+			}
+		} finally {
+			DbUtil.closeStatement(this.stmt);
+		}
+		return rtnList;
+	}
 
+	/**
+	 * 社員テーブルから指定された社員IDに一致するデータを削除する
+	 *
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	public void empDelete(int idEmployee) throws SQLException, ClassNotFoundException {
+		if (selectById(idEmployee).size()!=0) {
+			StringBuilder sql = new StringBuilder();
+			sql.append(" DELETE FROM ");
+			sql.append("    " + TBL_NAME);
+			sql.append(" WHERE ");
+			sql.append("    " + ID_EMPLOYEE + " = " + "?");
+			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,idEmployee);
+					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
+	 *
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	// 部署ID入力
+	public void empInsert(String name, String kn, String mailaddress, String password, int idDepartment) throws SQLException, ClassNotFoundException {
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		if (depDao.selectById(idDepartment).size()!=0) {  // 存在しない部署IDが入力されたときは登録処理を行わない
+			StringBuilder sql = new StringBuilder();
+			sql.append(" INSERT INTO ");
+			sql.append("    " + TBL_NAME);
+			sql.append(" (" + NM_EMPLOYEE + "," + KN_EMPLOYEE + "," + MAIL_ADDRESS + "," + PASSWORD + "," + ID_DEPARTMENT + ") ");
+			sql.append(" VALUES ");
+			sql.append(" (?, ?, ?, ?, ?) ");
+			System.out.println("指定された情報を登録しますか？ 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.setString(1,name);
+					stmt.setString(2,kn);
+					stmt.setString(3,mailaddress);
+					stmt.setString(4,password);
+					stmt.setInt(5,idDepartment);
+					stmt.executeUpdate();
+					System.out.println("登録が完了しました");
+				}  finally {
+					DbUtil.closeStatement(this.stmt);
+				}
+			}
+		}
+	}
+	// 部署名入力
+	public void empInsert(String name, String kn, String mailaddress, String password, String nmDepartment) throws SQLException, ClassNotFoundException {
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		List<DepartmentDTO> rtnList = depDao.selectByNm(nmDepartment);
+		if (rtnList.size()==1) {  // 部署名が特定できないときは登録処理を行わない
+			DepartmentDTO department = rtnList.get(0);
+			StringBuilder sql = new StringBuilder();
+			sql.append(" INSERT INTO ");
+			sql.append("    " + TBL_NAME);
+			sql.append(" (" + NM_EMPLOYEE + "," + KN_EMPLOYEE + "," + MAIL_ADDRESS + "," + PASSWORD + "," + ID_DEPARTMENT + ") ");
+			sql.append(" VALUES ");
+			sql.append(" (?, ?, ?, ?, ?) ");
+			System.out.println("指定された情報を登録しますか？ 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.setString(1,name);
+					stmt.setString(2,kn);
+					stmt.setString(3,mailaddress);
+					stmt.setString(4,password);
+					stmt.setInt(5,department.getIdDepartment());
+					stmt.executeUpdate();
+					System.out.println("登録が完了しました");
+				}  finally {
+					DbUtil.closeStatement(this.stmt);
+				}
+			}
+		} else if (rtnList.size()>1) {
+			System.out.println("入力された情報で部署を１つに特定できません");
+		}
+	}
+
+	/**
+	 * 社員テーブルの指定された社員IDに一致するデータを引数の内容に更新する
+	 *
+	 * @throws SQLException
+	 * @throws ClassNotFoundException
+	 */
+	// 部署ID入力
+	public void empUpdate(int idEmployee, String name, String kn, String mailaddress, String password, int idDepartment) throws SQLException, ClassNotFoundException {
+		EmployeeDTO employee = selectById(idEmployee).get(0);
+		if (name.trim().length()==0) name = employee.getNmEmployee();
+		if (kn.trim().length()==0) kn = employee.getKnEmployee();
+		if (mailaddress.trim().length()==0) mailaddress = employee.getMailaddress();
+		if (password.trim().length()==0) password = employee.getPassword();
+		if (idDepartment==0) idDepartment = employee.getIdDepartment();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		if (depDao.selectById(idDepartment).size()!=0) {  // 存在しない部署IDが入力されたときは更新処理を行わない
+			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 + " = " + "?");
+			System.out.println("指定されたIDの情報を更新しますか？ 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.setString(1,name);
+					stmt.setString(2,kn);
+					stmt.setString(3,mailaddress);
+					stmt.setString(4,password);
+					stmt.setInt(5,idDepartment);
+					stmt.setInt(6,idEmployee);
+					stmt.executeUpdate();
+					System.out.println("更新が完了しました");
+				}  finally {
+					DbUtil.closeStatement(this.stmt);
+				}
+			}
+		}
+	}
+	// 部署名入力
+	public void empUpdate(int idEmployee, String name, String kn, String mailaddress, String password, String NmDepartment) throws SQLException, ClassNotFoundException {
+		EmployeeDTO employee = selectById(idEmployee).get(0);
+		if (name.trim().length()==0) name = employee.getNmEmployee();
+		if (kn.trim().length()==0) kn = employee.getKnEmployee();
+		if (mailaddress.trim().length()==0) mailaddress = employee.getMailaddress();
+		if (password.trim().length()==0) password = employee.getPassword();
+		DepartmentDAO depDao = new DepartmentDAO(con);
+		List<DepartmentDTO> rtnList = depDao.selectByNm(NmDepartment);
+		if (rtnList.size()==1) {  // 部署名が特定できないときは登録処理を行わない
+			DepartmentDTO department = rtnList.get(0);
+			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 + " = " + "?");
+			System.out.println("指定されたIDの情報を更新しますか？ 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.setString(1,name);
+					stmt.setString(2,kn);
+					stmt.setString(3,mailaddress);
+					stmt.setString(4,password);
+					stmt.setInt(5,department.getIdDepartment());
+					stmt.setInt(6,idEmployee);
+					stmt.executeUpdate();
+					System.out.println("更新が完了しました");
+				}  finally {
+					DbUtil.closeStatement(this.stmt);
+				}
+			}
+		} else if (rtnList.size()>1) {
+			System.out.println("入力された情報で部署を１つに特定できません");
+		}
+	}
+
+}

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/dto/EmployeeDTO.java

@@ -2,38 +2,36 @@ package com.rhizome.example.dto;
 
 public class EmployeeDTO {
 
-	//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 int idEmployee;
+	private String nmEmployee;
+	private String knEmployee;
+	private String mailaddress;
 	private String password;
-	private Integer id_department;
+	private int idDepartment;
 
-	
-	public Integer getId_employee() {
-		return id_employee;
+	public int getIdEmployee() {
+		return idEmployee;
 	}
-	public void setId_employee(Integer id_employee) {
-		this.id_employee = id_employee;
+	public void setIdEmployee(int idEmployee) {
+		this.idEmployee = idEmployee;
 	}
-	public String getNm_employee() {
-		return nm_employee;
+	public String getNmEmployee() {
+		return nmEmployee;
 	}
-	public void setNm_employee(String nm_employee) {
-		this.nm_employee = nm_employee;
+	public void setNmEmployee(String nmEmployee) {
+		this.nmEmployee = nmEmployee;
 	}
-	public String getKn_employee() {
-		return kn_employee;
+	public String getKnEmployee() {
+		return knEmployee;
 	}
-	public void setKn_employee(String kn_employee) {
-		this.kn_employee = kn_employee;
+	public void setKnEmployee(String knEmployee) {
+		this.knEmployee = knEmployee;
 	}
-	public String getMail_address() {
-		return mail_address;
+	public String getMailaddress() {
+		return mailaddress;
 	}
-	public void setMail_address(String mail_address) {
-		this.mail_address = mail_address;
+	public void setMailaddress(String mailaddress) {
+		this.mailaddress = mailaddress;
 	}
 	public String getPassword() {
 		return password;
@@ -41,20 +39,21 @@ public class EmployeeDTO {
 	public void setPassword(String password) {
 		this.password = password;
 	}
-	public Integer getId_department() {
-		return id_department;
+	public int getIdDepartment() {
+		return idDepartment;
 	}
-	public void setId_department(Integer id_department) {
-		this.id_department = id_department;
-	}
-	public Object getPrimaryKeyValue() {
-		// TODO 自動生成されたメソッド・スタブ
-		return null;
+	public void setIdDepartment(int idDepartment) {
+		this.idDepartment = idDepartment;
 	}
 
-
-	
-	
-	
+	@Override
+	public String toString() {
+		return this.getIdEmployee() + "	"
+			  +this.getNmEmployee() + "	"
+			  +this.getKnEmployee() + "	"
+			  +this.getMailaddress() + "	"
+			  +this.getPassword() + "	"
+			  +this.getIdDepartment();
+	}
 
 }

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

@@ -49,15 +49,33 @@ public class Main {
 		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();
+		Connection con = DbUtil.getConnection();
+		EmployeeDAO empDao = new EmployeeDAO(con);
 		switch (ope) {
 		case "1":
 			empSelect();
 			break;
 		case "2":
+			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),
+							 Integer.parseInt(inputCheck("部署ID", true)));
 			break;
 		case "3":
-			break;
+			int id = Integer.parseInt(inputCheck("ID", true));
+			if (empDao.selectById(id).size()==0) break;  // 社員IDの照合に失敗した場合は処理を抜ける
+			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),
+								 Integer.parseInt(inputCheck("部署ID", true)));
+				break;
+			}
 		case "4":
+			empDao.empDelete(Integer.parseInt(inputCheck("ID", true)));
 			break;
 		case "9":
 			return;
@@ -79,7 +97,7 @@ 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 +106,16 @@ 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);
+				empList = empDao.selectById(Integer.parseInt(inputCheck("ID", true)));
 				break;
 			default:
 				return;
 			}
 			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);
 			}
 		} finally {
-			DbUtil.closeConnection();
+			DbUtil.closeConnection(empDao.con);
 		}
 	}
 
@@ -133,9 +144,6 @@ 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;
@@ -155,9 +163,7 @@ public class Main {
 						continue;
 					}
 				}
-				
 			}
-		
 			break;
 		}
 		return str;

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

@@ -0,0 +1,413 @@
+package com.rhizome.example.main;
+
+import java.nio.charset.Charset;
+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":
+				String infoEmployee = inputCheck("社員ID", false, "AllowEmpty");
+				int idEmployee = 0;  // 未入力時は０を渡す
+				try {
+					idEmployee = Integer.parseInt(infoEmployee);
+				} catch (NumberFormatException err) {}
+				String name = inputCheck("社員名", false, "AllowEmpty");
+				String kn = inputCheck("フリガナ", false, "AllowEmpty");
+				String mailaddress = inputCheck("メールアドレス", false, "AllowEmpty");
+				String password = inputCheck("パスワード", false, "AllowEmpty");
+				String infoDepartment = (inputCheck("部署情報", false, "AllowEmpty"));
+				try {
+					int idDepartment = Integer.parseInt(infoDepartment);
+					empList = empDao.empSelect(idEmployee, name, kn, mailaddress, password, idDepartment);
+				} catch (NumberFormatException err) {
+					if (infoDepartment.trim().length()==0) {
+						empList = empDao.empSelect(idEmployee, name, kn, mailaddress, password, 0);  // 未入力時は０を渡す
+					} else {
+						empList = empDao.empSelect(idEmployee, name, kn, mailaddress, password, infoDepartment);
+					}
+				}
+				break;
+			default:
+				return;
+			}
+			for (EmployeeDTO emp : empList) {
+				//System.out.println(emp);
+				System.out.println(toStringEmployee(emp));
+			}
+		} 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));
+			}
+		} 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);
+			String name = inputCheck("社員名", false);
+			String kn = inputCheck("フリガナ", false);
+			String mailaddress = inputCheck("メールアドレス", false);
+			String password = inputCheck("パスワード", false);
+			String infoDepartment = inputCheck("部署情報", false);
+			try {
+				int idDepartment = Integer.parseInt(infoDepartment);
+				empDao.empInsert(name, kn, mailaddress, password, idDepartment);
+			} catch (NumberFormatException err) {
+				empDao.empInsert(name, kn, mailaddress, password, infoDepartment);
+			}
+		} 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 idEmployee = Integer.parseInt(inputCheck("社員ID", true));
+			if (empDao.selectById(idEmployee).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 {
+				String name = inputCheck("社員名", false, "AllowEmpty");
+				String kn = inputCheck("フリガナ", false, "AllowEmpty");
+				String mailaddress = inputCheck("メールアドレス", false, "AllowEmpty");
+				String password = inputCheck("パスワード", false, "AllowEmpty");
+				String infoDepartment = (inputCheck("部署情報", false, "AllowEmpty"));
+				try {
+					int idDepartment = Integer.parseInt(infoDepartment);
+					empDao.empUpdate(idEmployee, name, kn, mailaddress, password, idDepartment);
+				} catch (NumberFormatException err) {
+					if (infoDepartment.trim().length()==0) {
+						empDao.empUpdate(idEmployee, name, kn, mailaddress, password, 0);  // 未入力時は０を渡す
+					} else {
+						empDao.empUpdate(idEmployee, name, kn, mailaddress, password, infoDepartment);
+					}
+				}
+			}
+		} 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 変更後テーブル名判定用フラグ
+	 */
+	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 入力内容
+	 */
+	// 入力必須
+	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;
+	}
+	// 未入力許可
+	public static String inputCheck(String titleName, boolean flg, String AllowEmpty) {
+		String str = null;
+		while (true) {
+			System.out.println(titleName + "を入力してください");
+			str = sc.nextLine();
+			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;
+	}
+
+	/**
+	 * 社員テーブルの出力文字列を生成する
+	 * ・各列の横幅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 format(8, employee.getIdEmployee())
+			  +format(16, employee.getNmEmployee())
+			  +format(24, employee.getKnEmployee())
+			  +format(24, employee.getMailaddress())
+			  +format(8, employee.getPassword())
+			  +format(16, depDao.getNmDepartment(employee.getIdDepartment()));
+	}
+
+	/**
+	 * 部署テーブルの出力文字列を生成する
+	 * ・各列の横幅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 format(8, department.getIdDepartment())
+			  +format(12, department.getNmDepartment());
+	}
+
+	/**
+	 * 出力文字数の表示幅が一定になるように空白を追加する
+	 *
+	 * @param bytelength
+	 *            指定表示幅
+	 * @param input
+	 *            空白を追加する文字列
+	 * @return 空白を追加した文字列
+	 */
+	// 文字列入力
+	public static String format(int bytelength, String input) {
+		int diff = (input.getBytes(Charset.forName("UTF-8")).length - input.length())/2;  // diff=全角文字(3byte)→文字数／半角文字(1byte)→０
+		if (bytelength-diff>=0) {
+			return String.format("%-"+(bytelength-diff)+"s", input);  // 表示幅=指定幅-全角文字表示に必要な追加表示幅
+		} else {
+			return input;
+		}
+	}
+	// 整数入力
+	public static String format(int bytelength, int id) {
+		String input = Integer.toString(id);
+		return format(bytelength, input);
+	}
+
+}

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 +44,12 @@ 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(DB_DRIVER);
+		// Connection : not null && 接続状態 → フィールドを戻す
+		if( !((con!=null)&&(con.isValid(1))) ) con = DriverManager.getConnection(DB_URL, DB_USER, DB_PASS);
+		return con;
+	}
 
 	/*
 	 * TODO 以下の仕様でメソッドを作成してください。
@@ -75,16 +60,11 @@ 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 +74,9 @@ 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() {
-		try {
-            if (con != null) con.close();
-        } catch (SQLException e) {
-            e.printStackTrace();
-        }
+	public static void closeConnection(Connection con) throws SQLException {
+		if (con!=null) con.close();
 	}
 
+
 }