質問編集履歴
1
作成途中で誤って投稿したため修正
test
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test
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```Java
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① AccountDAO.java
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package dao;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import model.Account;
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import model.Login;
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public class AccountDAO {
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// データベース接続に使用する情報
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private final String JDBC_URL = "jdbc:oracle:thin:[ユーザー名]/[パスワード]@//localhost:1521/orcl";
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private final String DB_USER = "[ユーザー名]";
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private final String DB_PASS = "[パスワード]";
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public Account findByLogin(Login login) {
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Account account = null;
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// データベースへ接続
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try (Connection conn = DriverManager.getConnection(JDBC_URL, DB_USER, DB_PASS)) {
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// SELECT文を準備
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String sql = "SELECT USER_ID, PASS, HEIGHT, WEIGHT_START, WEIGHT_GOAL FROM ACCOUNT WHERE USER_ID = ? AND PASS = ?";
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PreparedStatement pStmt = conn.prepareStatement(sql);
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pStmt.setString(1, login.getUserId());
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pStmt.setString(2, login.getPass());
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// SELECT文を実行し、結果表を取得
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ResultSet rs = pStmt.executeQuery();
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// 一致したユーザーが存在した場合、そのユーザーを表すAccountインスタンスを生成
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if (rs.next()) {
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// 結果表からデータを取得
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String userId = rs.getString("USER_ID");
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String pass = rs.getString("PASS");
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double height = rs.getDouble("HEIGHT");
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double weight_start = rs.getDouble("WEIGHT_START");
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double weight_goal = rs.getDouble("WEIGHT_GOAL");
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account = new Account(userId, pass, height, weight_start, weight_goal);
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}
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} catch (SQLException e) {
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e.printStackTrace();
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return null;
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}
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// 見つかったユーザーまたはnullを返す
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return account;
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}
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}
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② AccountDAOTest.java
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if (result != null) {
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System.out.println("testFindByLogin
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System.out.println("testFindByLogin：成功しました");
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} else {
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System.out.println("testFindByLogin
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System.out.println("testFindByLogin：失敗しました");
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}
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@@ -74,6 +180,98 @@
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③ Account.java
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package model;
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public class Account {
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private String userId;
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private String pass;
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private double height;
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private double weight_start;
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private double weight_goal;
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// コンストラクタを設定
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public Account(String userId, String pass, double height, double weight_start, double weight_goal) {
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this.userId = userId;
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this.pass = pass;
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this.height = height;
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this.weight_start = weight_start;
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this.weight_goal = weight_goal;
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}
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// ゲッターを設定
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public String getUserId() { return userId; }
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public String getPass() { return pass; }
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public double getHeight() { return height; }
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public double getWeight_start() { return weight_start; }
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public double getWeight_goal() { return weight_goal; }
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}
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④ Login.java
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package model;
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public class Login {
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private String userId;
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private String pass;
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// コンストラクタ（インスタンス生成時に呼び出されるメソッド）を設定
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public Login(String userId, String pass) {
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this.userId = userId;
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this.pass = pass;
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}
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// ゲッター（クラス外からフィールドの値を見れるメソッド）を設定
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public String getUserId() { return userId; }
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public String getPass() { return pass; }
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}
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```
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@@ -82,7 +280,9 @@
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「スッキリわかるサーブレット&JSP」というテキストを参考に作成しており、コードを見直していますが、どこに問題があるのかわかりません。
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DB接続エラーなどは出ていません。
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Toncat9(Java11)
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Oracle12c
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