20261029

.classpath

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
 	<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.jdt.core.javabuilder</name>
+			<name>org.eclipse.wst.validation.validationbuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
 		<buildCommand>
-			<name>org.eclipse.wst.validation.validationbuilder</name>
+			<name>org.eclipse.jdt.core.javabuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
 	</natures>
 </projectDescription>

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

@@ -1,243 +0,0 @@
-/*
- * EmployeeDAO.java
- *   作成	IT-College	2020
- *------------------------------------------------------------
- * Copyright(c) Rhizome Inc. All Rights Reserved.
- */
-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 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;
-	}
-
-	/**
-	 * 社員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 dto = new DepartmentDTO();
-
-				dto.setIdDepartment(rs.getInt(ID_DEPARTMENT));
-				dto.setNmDepartment(rs.getString(NM_DEPARTMENT));
-				rtnList.add(dto);
-			}
-		} finally {
-			DbUtil.closeStatement(this.stmt);
-		}
-		return rtnList;
-	}
-
-	//部署ID検索
-	public List<DepartmentDTO> selectById(int id) throws SQLException {
-		//戻り値用リスト
-		List<DepartmentDTO> rtnList = new ArrayList<>();
-		//SQL作成
-		StringBuilder sql = new StringBuilder();
-		sql.append(" SELECT * ");
-		sql.append(" FROM department ");
-		sql.append(" WHERE id_department = ? ");
-
-		try {
-			//PreparedStatement生成
-			stmt = con.prepareStatement(sql.toString());
-			//部署IDを設定
-			stmt.setInt(1, id);
-			//SQL実行
-			rs = stmt.executeQuery();
-			//検索結果をDTOへ格納
-			while (rs.next()) {
-				//DTO生成
-				DepartmentDTO dto = new DepartmentDTO();
-				//検索結果をDTOへセット
-				dto.setIdDepartment( rs.getInt(ID_DEPARTMENT));
-				dto.setNmDepartment( rs.getString(NM_DEPARTMENT));
-
-				//リストへ追加
-				rtnList.add(dto);
-			}
-
-		} finally {
-
-			DbUtil.closeStatement(stmt);
-		}
-		//検索結果を返却
-		return rtnList;
-	}
-	
-	//部署名検索
-	public List<DepartmentDTO> selectByName(String name) throws SQLException {
-	    //戻り値用リスト
-	    List<DepartmentDTO> rtnList = new ArrayList<>();
-	    //SQL作成
-	    StringBuilder sql = new StringBuilder();
-
-	    sql.append(" SELECT * ");
-	    sql.append(" FROM department ");
-	    sql.append(" WHERE nm_department = ? ");
-
-	    try {
-	        //PreparedStatement生成
-	        stmt = con.prepareStatement(sql.toString());
-	        //部署名を設定
-	        stmt.setString(1, name);
-	        //SQL実行
-	        rs = stmt.executeQuery();
-	        //検索結果をDTOへ格納
-	        while (rs.next()) {
-	            //DTO生成
-	            DepartmentDTO dto =  new DepartmentDTO();
-	            //検索結果をDTOへセット
-	            dto.setIdDepartment(rs.getInt(ID_DEPARTMENT));
-	            dto.setNmDepartment(rs.getString(NM_DEPARTMENT));
-
-	            //リストへ追加
-	            rtnList.add(dto);
-	        }
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-
-	    //検索結果を返却
-	    return rtnList;
-	}
-
-	//部署情報削除
-	public void deptDelete(int id) throws SQLException {
-		//SQL作成
-		StringBuilder sql = new StringBuilder();
-		sql.append(" DELETE ");
-		sql.append(" FROM ");
-		sql.append("    " + TBL_NAME);
-		sql.append(" WHERE ");
-		sql.append("    " + ID_DEPARTMENT + " = ?");
-
-		try {
-			//PreparedStatement生成
-			stmt = con.prepareStatement(sql.toString());
-			//値設定
-			stmt.setInt(1, id);
-			//SQL実行
-			stmt.executeUpdate();
-
-		} finally {
-
-			DbUtil.closeStatement(stmt);
-		}
-	}
-
-	//部署情報登録
-	public void deptInsert(
-			String departmentName)
-					throws SQLException {
-		//SQL作成
-		StringBuilder sql = new StringBuilder();
-
-		sql.append(" INSERT INTO department ");
-		sql.append(" ( ");
-		sql.append(" nm_department ");
-		sql.append(" ) ");
-		sql.append(" VALUES ");
-		sql.append(" (?) ");
-
-		try {
-
-			//PreparedStatement生成
-			stmt = con.prepareStatement(sql.toString());
-			//値設定
-			stmt.setString(1, departmentName);
-			//SQL実行
-			stmt.executeUpdate();
-
-		} finally {
-
-			DbUtil.closeStatement(stmt);
-		}
-	}
-
-	//部署情報更新
-	public void deptUpdate(
-			int id,
-			String departmentName)
-					throws SQLException {
-
-		//SQL作成
-		StringBuilder sql = new StringBuilder();
-
-		sql.append(" UPDATE department ");
-		sql.append(" SET ");
-		sql.append(" nm_department = ? ");
-		sql.append(" WHERE id_department = ? ");
-
-		try {
-
-			//PreparedStatement生成
-			stmt = con.prepareStatement(sql.toString());
-			//値設定
-			stmt.setString(1, departmentName);
-			stmt.setInt(2, id);
-
-			//SQL実行
-			stmt.executeUpdate();
-
-		} finally {
-
-			//Statement切断
-			DbUtil.closeStatement(stmt);
-		}
-	}
-
-	//部署ID存在確認
-	public boolean existsDepartment(int idDepartment)
-			throws SQLException {
-
-		List<DepartmentDTO> deptList = selectById(idDepartment);
-
-		return deptList.size() > 0;
-	}
-
-}
-

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

@@ -7,32 +7,25 @@
 package com.rhizome.example.dao;
 
 import java.sql.Connection;
-import java.sql.PreparedStatement;
+import java.sql.DriverManager;
 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.util.DbUtil;
+//import com.rhizome.example.main.EmployeeDTO;
+//実行結果をDTOに格納し、リストに追加
 
 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";
-	private static final String NM_DEPARTMENT = "nm_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
@@ -40,9 +33,9 @@ public class EmployeeDAO {
 	 * @throws ClassNotFoundException
 	 * @throws SQLException
 	 */
-	public EmployeeDAO(Connection con) {
+	//public EmployeeDAO(Connection con) {
-		this.con = con;
+		//this.con = con;
-	}
+	//}
 
 	/**
 	 * 社員テーブルの情報を全件取得する
@@ -53,404 +46,116 @@ public class EmployeeDAO {
 	 */
 	public List<EmployeeDTO> selectAll() throws SQLException, ClassNotFoundException {
 		List<EmployeeDTO> rtnList = new ArrayList<>();
-		StringBuilder sql = new StringBuilder();
-		sql.append(" SELECT ");
-		sql.append(" employee.id_employee ");
-		sql.append(" ,employee.nm_employee ");
-		sql.append(" ,employee.kn_employee ");
-		sql.append(" ,employee.mail_address ");
-		sql.append(" ,employee.password ");
-		sql.append(" ,employee.id_department ");
-		sql.append(" ,department.nm_department ");
-		sql.append(" FROM employee ");
-		sql.append(" INNER JOIN department ");
-		sql.append(" ON employee.id_department = department.id_department ");
-		try {
 		
-			this.stmt = con.prepareStatement(sql.toString());
+		Connection con = null;
-			rs = stmt.executeQuery();
+        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
 			while (rs.next()) {
-				EmployeeDTO dto = new EmployeeDTO();
+				EmployeeDTO emp = new EmployeeDTO();
 				
-				dto.setIdEmployee(rs.getInt(ID_EMPLOYEE));
+				emp.setId_employee(rs.getInt("id_employee"));
-				dto.setNmEmployee(rs.getString(NM_EMPLOYEE));
+				emp.setNm_employee(rs.getString("nm_employee"));
-				dto.setKnEmployee(rs.getString(KN_EMPLOYEE));
+				emp.setKn_employee(rs.getString("kn_employee"));
-				dto.setMailAddress(rs.getString(MAIL_ADDRESS));
+				emp.setMail_address(rs.getString("mail_address"));
-				dto.setPassword(rs.getString(PASSWORD));
+				emp.setPassword(rs.getString("password"));
-				dto.setIdDepartment(rs.getInt(ID_DEPARTMENT));
+				emp.setId_department(rs.getInt("id_department"));
-				dto.setNmDepartment(rs.getString(NM_DEPARTMENT));
+
-				rtnList.add(dto);
+				rtnList.add(emp);
 			}
-		} finally {
+			
-			DbUtil.closeStatement(this.stmt);
+		} 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();
+            }
+        }
 		return rtnList;
 	}
 	
-	//社員ID検索
+	//IDによる条件検索
-	public List<EmployeeDTO> selectById(int id) throws SQLException {
+	public java.util.List<EmployeeDTO> selectById​(int id) throws SQLException, ClassNotFoundException, NumberFormatException{
-		//戻り値用リスト
 		List<EmployeeDTO> rtnList = new ArrayList<>();
-		//SQL作成
-		StringBuilder sql = new StringBuilder();
-		sql.append(" SELECT ");
-		sql.append(" employee.id_employee ");
-		sql.append(" ,employee.nm_employee ");
-		sql.append(" ,employee.kn_employee ");
-		sql.append(" ,employee.mail_address ");
-		sql.append(" ,employee.password ");
-		sql.append(" ,employee.id_department ");
-		sql.append(" ,department.nm_department ");
-		sql.append(" FROM employee ");
-		sql.append(" INNER JOIN department ");
-		sql.append(" ON employee.id_department = department.id_department ");
-		sql.append(" WHERE employee.id_employee = ? ");
 		
-		try {
+		Connection con = null;
-			//PreparedStatement生成
+        Statement stmt = null;
-			stmt = con.prepareStatement(sql.toString());
-			//社員IDを設定
-			stmt.setInt(1, id);
-			//SQL実行
-			rs = stmt.executeQuery();
-			//検索結果をDTOへ格納
-			while (rs.next()) {
-				//DTO生成
-				EmployeeDTO dto = new EmployeeDTO();
-				//検索結果をDTOへセット
-				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.setNmDepartment(rs.getString(NM_DEPARTMENT));
 		
-				//リストへ追加
+        try {
-				rtnList.add(dto);
+            // JDBCドライバの読み込み
-			}
+            Class.forName("com.mysql.cj.jdbc.Driver");
 
-		} finally {
+            // 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
+            );
             
-			DbUtil.closeStatement(stmt);
+            String sql = "SELECT id_employee FROM employee WHERE id_employee";
-		}
+            stmt = con.createStatement();
-		//検索結果を返却
+            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();
+        	}
+        }
 		return rtnList;
+       }
+		
 	}
 
-	// 社員名検索
-	public List<EmployeeDTO> selectByName(String name) throws SQLException {
-	    //戻り値用リスト
-	    List<EmployeeDTO> rtnList = new ArrayList<>();
-	    //SQL作成
-	    StringBuilder sql = new StringBuilder();
 
-	    sql.append(" SELECT ");
-	    sql.append(" employee.id_employee ");
-	    sql.append(" ,employee.nm_employee ");
-	    sql.append(" ,employee.kn_employee ");
-	    sql.append(" ,employee.mail_address ");
-	    sql.append(" ,employee.password ");
-	    sql.append(" ,employee.id_department ");
-	    sql.append(" ,department.nm_department ");
-	    sql.append(" FROM employee ");
-	    sql.append(" INNER JOIN department ");
-	    sql.append(" ON employee.id_department = department.id_department ");
-	    sql.append(" WHERE employee.nm_employee = ? ");
-
-	    try {
-
-	        //PreparedStatement生成
-	        stmt = con.prepareStatement(sql.toString());
-
-	        //社員名を設定
-	        stmt.setString(1, name);
-
-	        //SQL実行
-	        rs = stmt.executeQuery();
-
-	        //検索結果をDTOへ格納
-	        while (rs.next()) {
-
-	            //DTO生成
-	            EmployeeDTO dto = new EmployeeDTO();
-
-	            //検索結果をDTOへセット
-	            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.setNmDepartment(rs.getString(NM_DEPARTMENT));
-
-	            //リストへ追加
-	            rtnList.add(dto);
-	        }
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-
-	    //検索結果を返却
-	    return rtnList;
-	}
-	
-	//フリガナ検索
-	public List<EmployeeDTO> selectByKana(String kana) throws SQLException {
-	    //戻り値用リスト
-	    List<EmployeeDTO> rtnList = new ArrayList<>();
-	    //SQL作成
-	    StringBuilder sql = new StringBuilder();
-
-	    sql.append(" SELECT ");
-	    sql.append(" employee.id_employee ");
-	    sql.append(" ,employee.nm_employee ");
-	    sql.append(" ,employee.kn_employee ");
-	    sql.append(" ,employee.mail_address ");
-	    sql.append(" ,employee.password ");
-	    sql.append(" ,employee.id_department ");
-	    sql.append(" ,department.nm_department ");
-	    sql.append(" FROM employee ");
-	    sql.append(" INNER JOIN department ");
-	    sql.append(" ON employee.id_department = department.id_department ");
-	    sql.append(" WHERE employee.kn_employee = ? ");
-
-	    try {
-	        //PreparedStatement生成
-	        stmt = con.prepareStatement(sql.toString());
-	        //フリガナ設定
-	        stmt.setString(1, kana);
-	        //SQL実行
-	        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));
-	            dto.setNmDepartment(rs.getString(NM_DEPARTMENT));
-
-	            rtnList.add(dto);
-	        }
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-
-	    return rtnList;
-	}
-	
-	//メールアドレス検索
-	public List<EmployeeDTO> selectByMail(String mail) throws SQLException {
-	    List<EmployeeDTO> rtnList = new ArrayList<>();
-	    StringBuilder sql = new StringBuilder();
-
-	    sql.append(" SELECT ");
-	    sql.append(" employee.id_employee ");
-	    sql.append(" ,employee.nm_employee ");
-	    sql.append(" ,employee.kn_employee ");
-	    sql.append(" ,employee.mail_address ");
-	    sql.append(" ,employee.password ");
-	    sql.append(" ,employee.id_department ");
-	    sql.append(" ,department.nm_department ");
-	    sql.append(" FROM employee ");
-	    sql.append(" INNER JOIN department ");
-	    sql.append(" ON employee.id_department = department.id_department ");
-	    sql.append(" WHERE employee.mail_address = ? ");
-
-	    try {
-
-	        stmt = con.prepareStatement(sql.toString());
-	        stmt.setString(1, mail);
-	        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));
-	            dto.setNmDepartment(rs.getString(NM_DEPARTMENT));
-
-	            rtnList.add(dto);
-	        }
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-
-	    return rtnList;
-	}
-	
-	//部署名検索
-
-	public List<EmployeeDTO> selectByDepartment(String department) throws SQLException {
-	    List<EmployeeDTO> rtnList = new ArrayList<>();
-	    StringBuilder sql = new StringBuilder();
-
-	    sql.append(" SELECT ");
-	    sql.append(" employee.id_employee ");
-	    sql.append(" ,employee.nm_employee ");
-	    sql.append(" ,employee.kn_employee ");
-	    sql.append(" ,employee.mail_address ");
-	    sql.append(" ,employee.password ");
-	    sql.append(" ,employee.id_department ");
-	    sql.append(" ,department.nm_department ");
-	    sql.append(" FROM employee ");
-	    sql.append(" INNER JOIN department ");
-	    sql.append(" ON employee.id_department = department.id_department ");
-	    sql.append(" WHERE department.nm_department = ? ");
-
-	    try {
-
-	        stmt = con.prepareStatement(sql.toString());
-	        stmt.setString(1, department);
-	        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));
-	            dto.setNmDepartment(rs.getString(NM_DEPARTMENT));
-
-	            rtnList.add(dto);
-	        }
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-
-	    return rtnList;
-	}
-	
-	//社員情報削除
-	public void empDelete(int id) throws SQLException {
-	    //SQL作成
-	    StringBuilder sql = new StringBuilder();
-	    sql.append(" DELETE ");
-	    sql.append(" FROM ");
-	    sql.append("    " + TBL_NAME);
-	    sql.append(" WHERE ");
-	    sql.append("    " + ID_EMPLOYEE + " = ?");
-
-	    try {
-	        //PreparedStatement生成
-	        stmt = con.prepareStatement(sql.toString());
-	        //値設定
-	        stmt.setInt(1, id);
-	        //SQL実行
-	        stmt.executeUpdate();
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-	}
-	
-	//社員情報登録
-	public void empInsert(
-	        String name,
-	        String kana,
-	        String mail,
-	        String password,
-	        int departmentId)
-	        throws SQLException {
-	    //SQL作成
-	    StringBuilder sql = new StringBuilder();
-
-	    sql.append(" INSERT INTO employee ");
-	    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 ");
-	    sql.append(" (?, ?, ?, ?, ?) ");
-
-	    try {
-
-	        //PreparedStatement生成
-	        stmt = con.prepareStatement(sql.toString());
-	        //値設定
-	        stmt.setString(1, name);
-	        stmt.setString(2, kana);
-	        stmt.setString(3, mail);
-	        stmt.setString(4, password);
-	        stmt.setInt(5, departmentId);
-
-	        //SQL実行
-	        stmt.executeUpdate();
-
-	    } finally {
-
-	        DbUtil.closeStatement(stmt);
-	    }
-	}
-	
-	//社員情報更新
-	public void empUpdate(
-	        int id,
-	        String name,
-	        String kana,
-	        String mail,
-	        String password,
-	        int departmentId)
-	        throws SQLException {
-
-	    //SQL作成
-	    StringBuilder sql = new StringBuilder();
-
-	    sql.append(" UPDATE employee ");
-	    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 id_employee = ? ");
-
-	    try {
-
-	        //PreparedStatement生成
-	        stmt = con.prepareStatement(sql.toString());
-	        //値設定
-	        stmt.setString(1, name);
-	        stmt.setString(2, kana);
-	        stmt.setString(3, mail);
-	        stmt.setString(4, password);
-	        stmt.setInt(5, departmentId);
-	        stmt.setInt(6, id);
-
-	        // SQL実行
-	        stmt.executeUpdate();
-
-	    } finally {
-
-	        // Statement切断
-	        DbUtil.closeStatement(stmt);
-	    }
-	}
-
-}

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

@@ -1,23 +0,0 @@
-package com.rhizome.example.dto;
-
-public class DepartmentDTO {
-
-	private Integer idDepartment;
-	private String nmDepartment;
-
-	public Integer getIdDepartment() {
-		return idDepartment;
-	}
-
-	public void setIdDepartment(Integer idDepartment) {
-		this.idDepartment = idDepartment;
-	}
-
-	public String getNmDepartment() {
-		return nmDepartment;
-	}
-
-	public void setNmDepartment(String nmDepartment) {
-		this.nmDepartment = nmDepartment;
-	}
-}

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

@@ -2,38 +2,38 @@ package com.rhizome.example.dto;
 
 public class EmployeeDTO {
 	
-	private Integer idEmployee;
+	//Employeeテーブルのカラム分のフィールド
-	private String nmEmployee;
+	private Integer id_employee;
-	private String knEmployee;
+	private String nm_employee;
-	private String mailAddress;
+	private String kn_employee;
+	private String mail_address;
 	private String password;
-	private Integer idDepartment;
+	private Integer id_department;
-	private String nmDepartment;
 	
 	
-	public Integer getIdEmployee() {
+	public Integer getId_employee() {
-		return idEmployee;
+		return id_employee;
 	}
-	public void setIdEmployee(Integer idEmployee) {
+	public void setId_employee(Integer id_employee) {
-		this.idEmployee = idEmployee;
+		this.id_employee = id_employee;
 	}
-	public String getNmEmployee() {
+	public String getNm_employee() {
-		return nmEmployee;
+		return nm_employee;
 	}
-	public void setNmEmployee(String nmEmployee) {
+	public void setNm_employee(String nm_employee) {
-		this.nmEmployee = nmEmployee;
+		this.nm_employee = nm_employee;
 	}
-	public String getKnEmployee() {
+	public String getKn_employee() {
-		return knEmployee;
+		return kn_employee;
 	}
-	public void setKnEmployee(String knEmployee) {
+	public void setKn_employee(String kn_employee) {
-		this.knEmployee = knEmployee;
+		this.kn_employee = kn_employee;
 	}
-	public String getMailAddress() {
+	public String getMail_address() {
-		return mailAddress;
+		return mail_address;
 	}
-	public void setMailAddress(String mailAddress) {
+	public void setMail_address(String mail_address) {
-		this.mailAddress = mailAddress;
+		this.mail_address = mail_address;
 	}
 	public String getPassword() {
 		return password;
@@ -41,19 +41,20 @@ public class EmployeeDTO {
 	public void setPassword(String password) {
 		this.password = password;
 	}
-	public Integer getIdDepartment() {
+	public Integer getId_department() {
-		return idDepartment;
+		return id_department;
 	}
-	public void setIdDepartment(Integer idDepartment) {
+	public void setId_department(Integer id_department) {
-		this.idDepartment = idDepartment;
+		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 String getNmDepartment() {
-	    return nmDepartment;
-	}
 
-	public void setNmDepartment(String nmDepartment) {
+	
-	    this.nmDepartment = nmDepartment;
+	
-	}
+	
 
 }

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

@@ -6,9 +6,7 @@ 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;
 
@@ -53,51 +51,15 @@ public class Main {
 		String ope = sc.nextLine();
 		switch (ope) {
 		case "1":
-			//社員テーブル
+			empSelect();
-			if (tblFlg == 0) {
-				empSelect();
-
-				//部署テーブル
-			} else {
-				deptSelect();
-			}
 			break;
 		case "2":
-			//社員テーブル
-			if (tblFlg == 0) {
-				empInsert();
-
-				//部署テーブル
-			} else {
-				deptInsert();
-			}
 			break;
 		case "3":
-			//社員テーブル
-			if (tblFlg == 0) {
-				empUpdate();
-
-				//部署テーブル
-			} else {
-				deptUpdate();
-			}
 			break;
 		case "4":
-			//社員テーブル
-			if (tblFlg == 0) {
-				empDelete();
-
-				//部署テーブル
-			} else {
-				deptDelete();
-			}
 			break;
 		case "9":
-			if (tblFlg == 0) {
-				tblFlg = 1;
-			} else {
-				tblFlg = 0;
-			}		
 			return;
 		case "0":
 			System.out.println("システムを終了します");
@@ -117,7 +79,7 @@ public class Main {
 	public static void empSelect() throws ClassNotFoundException, SQLException {
 		List<EmployeeDTO> empList = new ArrayList<>();
 		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
+		EmployeeDAO empDao = new EmployeeDAO();
 		System.out.println("1:全検索 2:条件検索 それ以外:戻る");
 		String select = sc.nextLine();
 		try {
@@ -125,137 +87,26 @@ public class Main {
 			case "1":
 				empList = empDao.selectAll();
 				break;
-
 			case "2":
-			    //検索項目選択
+				String id = sc.nextLine();//IDを入力
-				System.out.println("1:ID 2:社員名 3:フリガナ 4:メールアドレス 5:部署名");
+				int num = Integer.valueOf(id);//String型のIDをint型に変換
-			    String condition = sc.nextLine();
+				empList = empDao.selectById​(num);
-			    switch (condition) {
+				break;
-
-			    //ID検索
-			    case "1":
-			        String id = inputCheck("ID", true);
-			        empList = empDao.selectById(Integer.parseInt(id));
-
-			        break;
-
-			    //社員名検索
-			    case "2":
-			        String name = inputCheck("社員名", false);
-			        empList = empDao.selectByName(name);
-
-			        break;
-			        
-			        //フリガナ検索
-			    case "3":
-			        String kana = inputCheck("フリガナ", false);
-			        empList = empDao.selectByKana(kana);
-
-			        break;
-
-			    //メールアドレス検索
-			    case "4":
-			        String mail = inputCheck("メールアドレス", false);
-			        empList = empDao.selectByMail(mail);
-
-			        break;
-
-			    //部署名検索
-			    case "5":
-			        String department = inputCheck("部署名", false);
-			        empList = empDao.selectByDepartment(department);
-
-			        break;
-
-			    default:
-
-			        return;
-			    }
-
-			    break;
-
 			default:
 				return;
 			}
-
-			if (empList.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;
-			}
-
-			//最大文字数取得
-			int maxName = 0;
-			int maxKana = 0;
-			int maxMail = 0;
-			int maxPassword = 0;
-			int maxDepartment = 0;
-
 			for (EmployeeDTO emp : empList) {
-
+				System.out.println(emp.getId_employee() + "\t" 
-				if (getDisplayLength(emp.getNmEmployee()) > maxName) {
+                        + emp.getNm_employee() + "\t" 
-					maxName = getDisplayLength(emp.getNmEmployee());
+                        + emp.getKn_employee() + "\t"
-				}
+                        + emp.getMail_address() + "\t" 
-
+                        + emp.getPassword() + "\t" 
-				if (getDisplayLength(emp.getKnEmployee()) > maxKana) {
+                        + emp.getId_department());
-					maxKana = getDisplayLength(emp.getKnEmployee());
-				}
-
-				if (getDisplayLength(emp.getMailAddress()) > maxMail) {
-					maxMail = getDisplayLength(emp.getMailAddress());
-				}
-
-				if (getDisplayLength(emp.getPassword()) > maxPassword) {
-					maxPassword = getDisplayLength(emp.getPassword());
-				}
-
-				if (getDisplayLength(emp.getNmDepartment())
-						> maxDepartment) {
-					maxDepartment = getDisplayLength(emp.getNmDepartment());
-				}
-			}
-
-
-
-			for (EmployeeDTO emp : empList) {
-
-				System.out.println(
-						adjust(String.valueOf(emp.getIdEmployee()),10)
-						+ adjust(emp.getNmEmployee(), maxName + 5)
-						+ adjust(emp.getKnEmployee(), maxKana + 5)
-						+ adjust(emp.getMailAddress(), maxMail + 5)
-						+ adjust(emp.getPassword(), maxPassword + 5)
-						+ adjust(emp.getNmDepartment(), maxDepartment + 5));
 			}
 		} finally {
-			DbUtil.closeConnection(empDao.con);
+			DbUtil.closeConnection();
 		}
 	}
-	//表示幅取得
-	//半角=1
-	//全角=2
-	public static int getDisplayLength(String str) {
-		int length = 0;
-		for (char c : str.toCharArray()) {
-			//ASCIIコードで算出
-			if (c <= 127) {
-				length += 1;
-			} else {
-				length += 2;
-			}
-		}
-		return length;
-	}
-
-
-	//指定文字数まで空白を追加
-	public static String adjust(String str, int length) {
-		StringBuilder sb = new StringBuilder(str);
-
-		while (getDisplayLength(sb.toString()) < length) {
-			sb.append(" ");
-		}
-		return sb.toString();
-	}
 
 	/**
 	 * フラグを判定し、テーブル名を取得する
@@ -282,6 +133,9 @@ 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;
@@ -301,406 +155,11 @@ public class Main {
 						continue;
 					}
 				}
+				
 			}
+		
 			break;
 		}
 		return str;
 	}
-
-	//更新用入力
-	//Enterのみの場合は現在値を返す
-	public static String inputUpdate(
-			String titleName,
-			String currentValue) {
-
-		System.out.println(
-				titleName
-				+ "を入力してください"
-				+ "（現在値：" + currentValue + "）");
-
-		String str = sc.nextLine();
-
-		//Enterのみの場合は現在値を返却
-		if (str.trim().length() == 0) {
-			return currentValue;
-		}
-
-		return str;
-	}
-
-	//社員情報を削除する
-	public static void empDelete() throws ClassNotFoundException, SQLException {
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
-
-		try {
-			//削除対象ID入力
-			String strId = inputCheck("ID", true);
-			int id = Integer.parseInt(strId);
-
-			//入力されたID確認
-			List<EmployeeDTO> empList =  empDao.selectById(id);
-			//データが存在しない場合
-			if (empList.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;
-			}
-
-			//削除確認メッセージ表示
-			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)");
-
-			String answer = sc.nextLine();
-
-			//Yまたはyが入力された場合のみ削除
-			if ("Y".equals(answer) || "y".equals(answer)) {
-				//社員情報削除
-				empDao.empDelete(id);
-
-				System.out.println("削除が完了しました");
-			}
-
-		} finally {
-
-			DbUtil.closeConnection(empDao.con);
-		}
-	}
-
-	//社員情報登録
-	public static void empInsert() throws ClassNotFoundException, SQLException {
-
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
-		DepartmentDAO deptDao = new DepartmentDAO(con);
-
-		try {
-
-			//社員名入力
-			String name = inputCheck("社員名", false);
-			//フリガナ入力
-			String kana = inputCheck("フリガナ", false);
-			//メールアドレス入力
-			String mail = inputCheck("メールアドレス", false);
-			//パスワード入力
-			String password = inputCheck("パスワード", false);
-			//部署ID入力
-			String departmentId = inputCheck("部署ID", true);
-			
-		    //部署IDを数値変換
-		    int deptId = Integer.parseInt(departmentId);
-
-		    //入力された部署IDが存在するかチェック
-		    if (!deptDao.existsDepartment(deptId)) {
-
-		        System.out.println("入力された部署IDは存在しません");
-
-		        return;
-		    }
-		    
-		    //登録確認
-		    System.out.println("社員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)");
-
-		    String answer = sc.nextLine();
-
-		    if (!"Y".equals(answer) && !"y".equals(answer)) {
-		        return;
-		    }
-			
-			//登録処理
-		    empDao.empInsert(
-		            name,
-		            kana,
-		            mail,
-		            password,
-		            deptId);
-
-			System.out.println("登録が完了しました");
-
-		} finally {
-
-			DbUtil.closeConnection(empDao.con);
-		}
-	}
-
-	//社員情報更新
-	public static void empUpdate() throws ClassNotFoundException, SQLException {
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		EmployeeDAO empDao = new EmployeeDAO(con);
-		//部署テーブル存在確認用DAO生成
-		DepartmentDAO deptDao = new DepartmentDAO(con);
-
-		try {
-			//更新対象ID入力
-			String strId = inputCheck("ID", true);
-			int id = Integer.parseInt(strId);
-
-			//存在チェック
-			List<EmployeeDTO> empList = empDao.selectById(id);
-
-			if (empList.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;
-			}
-
-
-			EmployeeDTO emp = empList.get(0);
-
-			//Enterのみの場合は現在値をそのまま使用
-			//社員名入力
-			String name = inputUpdate("社員名", emp.getNmEmployee());
-			//フリガナ入力
-			String kana = inputUpdate("フリガナ", emp.getKnEmployee());
-			//メールアドレス入力
-			String mail = inputUpdate("メールアドレス", emp.getMailAddress());
-			//パスワード入力
-			String password = inputUpdate("パスワード", emp.getPassword());
-			//部署ID入力
-			String departmentId = inputUpdate("部署ID", String.valueOf(emp.getIdDepartment()));
-			
-			//部署IDを数値変換
-			int deptId = Integer.parseInt(departmentId);
-			//入力された部署IDが存在するかチェック
-			if (!deptDao.existsDepartment(deptId)) {
-			    System.out.println("入力された部署IDは存在しません");
-
-			    return;
-			}
-			
-			//更新確認
-			System.out.println("社員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)");
-
-			String answer = sc.nextLine();
-
-			if (!"Y".equals(answer) && !"y".equals(answer)) {
-			    return;
-			}
-			
-			//更新処理
-			empDao.empUpdate(
-			        id,
-			        name,
-			        kana,
-			        mail,
-			        password,
-			        deptId);
-
-			System.out.println("更新が完了しました");
-
-		} finally {
-
-			DbUtil.closeConnection(empDao.con);
-		}
-	}
-
-	//テーブル切り替え
-	//ここから部署テーブル
-	//部署テーブルから情報を検索する
-	public static void deptSelect() throws ClassNotFoundException, SQLException {
-
-		//検索結果格納用リスト
-		List<DepartmentDTO> deptList = new ArrayList<>();
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		//DAO生成
-		DepartmentDAO deptDao = new DepartmentDAO(con);
-		//検索方法選択
-		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) {
-
-			//全件検索
-			case "1":
-				deptList = deptDao.selectAll();
-				break;
-
-			//条件検索
-			case "2":
-			    //検索項目選択
-			    System.out.println("1:ID 2:部署名");
-			    String condition = sc.nextLine();
-			    switch (condition) {
-
-			    //ID検索
-			    case "1":
-			        String id = inputCheck("ID", true);
-			        deptList = deptDao.selectById(Integer.parseInt(id));
-
-			        break;
-
-			    //部署名検索
-			    case "2":
-			        String name = inputCheck("部署名", false);
-			        deptList = deptDao.selectByName(name);
-
-			        break;
-
-			    default:
-
-			        return;
-			    }
-
-			    break;
-
-			//メニューへ戻る
-			default:
-
-			    return;
-			}
-
-			//検索結果0件の場合
-			if (deptList.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;
-			}
-
-			//検索結果表示
-			for (DepartmentDTO dept : deptList) {
-
-				System.out.println(
-						dept.getIdDepartment()
-						+ "\t"
-						+ dept.getNmDepartment());
-			}
-
-		} finally {
-
-			DbUtil.closeConnection(deptDao.con);
-		}
-	}
-
-	//部署情報登録
-	public static void deptInsert() throws ClassNotFoundException, SQLException {
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		//DAO生成
-		DepartmentDAO deptDao =
-				new DepartmentDAO(con);
-
-		try {
-			//部署名入力
-			String departmentName = inputCheck("部署名", false);
-			
-			//登録確認
-			System.out.println("部署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)");
-
-			String answer = sc.nextLine();
-
-			if (!"Y".equals(answer)  && !"y".equals(answer)) {
-
-			    return;
-			}
-			
-
-			//登録処理
-			deptDao.deptInsert(departmentName);
-			System.out.println("登録が完了しました");
-
-		} finally {
-
-			DbUtil.closeConnection(deptDao.con);
-		}
-	}
-
-	//部署情報更新
-	public static void deptUpdate() throws ClassNotFoundException, SQLException {
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		//DAO生成
-		DepartmentDAO deptDao =	new DepartmentDAO(con);
-
-		try {
-			//更新対象ID入力
-			String strId = inputCheck("ID", true);
-
-			int id = Integer.parseInt(strId);
-
-			//存在チェック
-			List<DepartmentDTO> deptList = deptDao.selectById(id);
-
-			//データが存在しない場合
-			if (deptList.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;
-			}
-
-			//部署名入力
-			String departmentName = inputCheck("部署名", false);
-			
-			//更新確認
-			System.out.println("部署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)");
-
-			String answer = sc.nextLine();
-
-			if (!"Y".equals(answer) && !"y".equals(answer)) {
-			    return;
-			}
-
-			//更新処理
-			deptDao.deptUpdate(id, departmentName);
-
-			System.out.println("更新が完了しました");
-
-		} finally {
-
-			DbUtil.closeConnection(
-					deptDao.con);
-		}
-	}
-
-	//部署情報を削除する
-	public static void deptDelete() throws ClassNotFoundException, SQLException {
-		//DB接続
-		Connection con = DbUtil.getConnection();
-		//DAO生成
-		DepartmentDAO deptDao = new DepartmentDAO(con);
-
-		try {
-			//削除対象ID入力
-			String strId = inputCheck("ID", true);
-			int id = Integer.parseInt(strId);
-
-			//入力されたIDの存在確認
-			List<DepartmentDTO> deptList = deptDao.selectById(id);
-
-			//データが存在しない場合
-			if (deptList.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;
-			}
-
-			//削除確認メッセージ表示
-			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)");
-			String answer = sc.nextLine();
-
-			//Yまたはyが入力された場合のみ削除
-			if ("Y".equals(answer) || "y".equals(answer)) {
-
-				//部署情報削除
-				deptDao.deptDelete(id);
-				System.out.println("削除が完了しました");
-			}
-
-		} finally {
-
-			DbUtil.closeConnection(deptDao.con);
-		}
-	}
-
-
-
 }

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

@@ -5,6 +5,7 @@ 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";
@@ -44,19 +45,26 @@ 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");
 
-	public static Connection getConnection()
+            // Connectionの生成
-			throws ClassNotFoundException, SQLException {
+            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;
+     }
 	
-		Class.forName(DB_DRIVER);
-
-		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。
@@ -67,16 +75,16 @@ 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。
 	 *
@@ -86,12 +94,12 @@ 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() {
-	public static void closeConnection(Connection con)
+		try {
-			throws SQLException {
+            if (con != null) con.close();
-
+        } catch (SQLException e) {
-		if (con != null) {
+            e.printStackTrace();
-			con.close();
+        }
-		}
 	}
+
 }