2026_1011_3FR_Java_Kyono/em-jdbc
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石原　叶大
2026-10-28 16:56:46 +09:00
parent 9932633268
commit 395f2f4f90
10 changed files with 342 additions and 6 deletions
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8
.classpath Normal file
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@@ -0,0 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="src" path="src"/>
<classpathentry kind="lib" path="lib/mysql-connector-java-8.0.23.jar"/>
<classpathentry kind="lib" path="実行例/DAO_Simple.jar"/>
<classpathentry kind="output" path="bin"/>
</classpath>

1
.gitignore vendored Normal file
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@@ -0,0 +1 @@
/bin/

23
.project Normal file
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@@ -0,0 +1,23 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>em-jdbc</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.wst.validation.validationbuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

7
.settings/.jsdtscope Normal file
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@@ -0,0 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.JRE_CONTAINER"/>
<classpathentry kind="con" path="org.eclipse.wst.jsdt.launching.baseBrowserLibrary"/>
<classpathentry kind="src" path=""/>
<classpathentry kind="output" path=""/>
</classpath>

1
.settings/org.eclipse.wst.jsdt.ui.superType.container Normal file
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@@ -0,0 +1 @@
org.eclipse.wst.jsdt.launching.JRE_CONTAINER

1
.settings/org.eclipse.wst.jsdt.ui.superType.name Normal file
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@@ -0,0 +1 @@
Global

122
src/com/rhizome/example/dao/EmployeeDAO.java
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@@ -13,6 +13,7 @@ import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import com.rhizome.example.dto.EmployeeDTO;
import com.rhizome.example.util.DbUtil;
public class EmployeeDAO {
@@ -48,8 +49,8 @@ public class EmployeeDAO {
* @throws SQLException
* @throws ClassNotFoundException
*/
public List<String> selectAll() throws SQLException, ClassNotFoundException {
List<String> rtnList = new ArrayList<>();
public List<EmployeeDTO> selectAll() throws SQLException, ClassNotFoundException {
List<EmployeeDTO> rtnList = new ArrayList<>();
StringBuilder sql = new StringBuilder();
sql.append(" SELECT ");
sql.append(" " + "*");
@@ -60,7 +61,15 @@ public class EmployeeDAO {
this.stmt = con.prepareStatement(sql.toString());
rs = stmt.executeQuery();
while (rs.next()) {
rtnList.add(rs.getString(NM_EMPLOYEE));
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));
rtnList.add(dto);
}
} finally {
DbUtil.closeStatement(this.stmt);
@@ -68,4 +77,111 @@ public class EmployeeDAO {
return rtnList;
}
//社員ID検索
public List<EmployeeDTO> selectById(int id) 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(" FROM employee ");
sql.append(" WHERE id_employee = ? ");
try {
//PreparedStatement生成
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));
//リストへ追加
rtnList.add(dto);
}
} finally {
DbUtil.closeStatement(stmt);
}
//検索結果を返却
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);
}
}
}

50
src/com/rhizome/example/dto/EmployeeDTO.java Normal file
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@@ -0,0 +1,50 @@
package com.rhizome.example.dto;
public class EmployeeDTO {
private Integer idEmployee;
private String nmEmployee;
private String knEmployee;
private String mailAddress;
private String password;
private Integer idDepartment;
public Integer getIdEmployee() {
return idEmployee;
}
public void setIdEmployee(Integer idEmployee) {
this.idEmployee = idEmployee;
}
public String getNmEmployee() {
return nmEmployee;
}
public void setNmEmployee(String nmEmployee) {
this.nmEmployee = nmEmployee;
}
public String getKnEmployee() {
return knEmployee;
}
public void setKnEmployee(String knEmployee) {
this.knEmployee = knEmployee;
}
public String getMailAddress() {
return mailAddress;
}
public void setMailAddress(String mailAddress) {
this.mailAddress = mailAddress;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getIdDepartment() {
return idDepartment;
}
public void setIdDepartment(Integer idDepartment) {
this.idDepartment = idDepartment;
}
}

106
src/com/rhizome/example/main/Main.java
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@@ -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;
/**
@@ -53,10 +54,12 @@ public class Main {
empSelect();
break;
case "2":
empInsert();
break;
case "3":
break;
case "4":
empDelete();
break;
case "9":
return;
@@ -76,7 +79,7 @@ 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);
System.out.println("1:全検索 2:条件検索 それ以外:戻る");
@@ -86,11 +89,33 @@ public class Main {
case "1":
empList = empDao.selectAll();
break;
case "2":
String id = inputCheck("ID", true);
empList = empDao.selectById(
Integer.parseInt(id));
break;
default:
return;
}
for (String emp : empList) {
System.out.println(emp);
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;
}
for (EmployeeDTO emp : empList) {
System.out.println(
emp.getIdEmployee() + "\t"
+ emp.getNmEmployee() + "\t"
+ emp.getKnEmployee() + "\t"
+ emp.getMailAddress() + "\t"
+ emp.getPassword() + "\t"
+ emp.getIdDepartment()
);
}
} finally {
DbUtil.closeConnection(empDao.con);
@@ -146,4 +171,79 @@ public class Main {
}
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);
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);
//登録処理
empDao.empInsert(
name,
kana,
mail,
password,
Integer.parseInt(departmentId));
System.out.println("登録が完了しました");
} finally {
DbUtil.closeConnection(empDao.con);
}
}
}

29
src/com/rhizome/example/util/DbUtil.java
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@@ -1,6 +1,9 @@
package com.rhizome.example.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
public class DbUtil {
// 定数定義（共通）
@@ -42,6 +45,18 @@ public class DbUtil {
* ※Connection生成には上記の定数を活用してください
*/
public static Connection getConnection()
throws ClassNotFoundException, SQLException {
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。
@@ -53,6 +68,14 @@ public class DbUtil {
* 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)
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。
@@ -64,5 +87,11 @@ public class DbUtil {
* 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(Connection con)
throws SQLException {
if (con != null) {
con.close();
}
}
}