2026_1011_3FR_Java_Kyono/em-jdbc
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福森　百夢
2026-10-29 16:05:09 +09:00
parent 195edf2188
commit 1f9f00bfd0
3 changed files with 183 additions and 58 deletions
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143
src/com/rhizome/example/dao/EmployeeDAO.java
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@@ -7,30 +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.main.EmployeeDTO;
import com.rhizome.example.util.DbUtil;
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
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
@@ -38,9 +33,9 @@ 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
@@ -51,24 +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(" " + "*");
sql.append(" FROM ");
sql.append(" " + TBL_NAME);
try {
this.stmt = con.prepareStatement(sql.toString());
rs = stmt.executeQuery();
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
while (rs.next()) {
EmployeeDTO emdto = new EmployeeDTO();
emdto.set
rtnList.add(rs.getString(NM_EMPLOYEE));
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);
}
} catch (ClassNotFoundException | SQLException e) {
e.printStackTrace();
} finally {
DbUtil.closeStatement();
// Statement、Connectionの切断
try {
if (stmt != null) stmt.close();
if (con != null) con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
return rtnList;
}
//IDによる条件検索
public java.util.List<EmployeeDTO> selectById​(int id) throws SQLException, ClassNotFoundException, NumberFormatException{
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();
}
}
return rtnList;
}
}

64
src/com/rhizome/example/dto/EmployeeDTO.java
View File

@@ -3,36 +3,58 @@ 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 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";
public static String getTblName() {
return TBL_NAME;
private Integer id_employee;
private String nm_employee;
private String kn_employee;
private String mail_address;
private String password;
private Integer id_department;
public Integer getId_employee() {
return id_employee;
}
public static String getIdEmployee() {
return ID_EMPLOYEE;
public void setId_employee(Integer id_employee) {
this.id_employee = id_employee;
}
public static String getNmEmployee() {
return NM_EMPLOYEE;
public String getNm_employee() {
return nm_employee;
}
public static String getKnEmployee() {
return KN_EMPLOYEE;
public void setNm_employee(String nm_employee) {
this.nm_employee = nm_employee;
}
public static String getMailAddress() {
return MAIL_ADDRESS;
public String getKn_employee() {
return kn_employee;
}
public static String getPassword() {
return PASSWORD;
public void setKn_employee(String kn_employee) {
this.kn_employee = kn_employee;
}
public static String getIdDepartment() {
return ID_DEPARTMENT;
public String getMail_address() {
return mail_address;
}
public void setMail_address(String mail_address) {
this.mail_address = mail_address;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getId_department() {
return id_department;
}
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;
}
}

24
src/com/rhizome/example/main/Main.java
View File

@@ -7,6 +7,7 @@ import java.util.List;
import java.util.Scanner;
import com.rhizome.example.dao.EmployeeDAO;
import com.rhizome.example.dto.EmployeeDTO;
import com.rhizome.example.util.DbUtil;
/**
@@ -76,9 +77,9 @@ public class Main {
* @throws SQLException
*/
public static void empSelect() throws ClassNotFoundException, SQLException {
List<String> empList = new ArrayList<>();
List<EmployeeDTO> empList = new ArrayList<>();
Connection con = DbUtil.getConnection();
EmployeeDAO empDao = new EmployeeDAO(con);
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 {
@@ -86,11 +87,21 @@ public class Main {
case "1":
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);
break;
default:
return;
}
for (String emp : empList) {
System.out.println(emp);
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());
}
} finally {
DbUtil.closeConnection();
@@ -122,6 +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;
@@ -141,7 +155,9 @@ public class Main {
continue;
}
}
}
break;
}
return str;