JDBC PreparedStatementの例 - レコードを削除する

次に、JDBC PreparedStatementを使用してテーブルからレコードを削除する方法を示す例を示します。 delete文を発行するには、次のように `PreparedStatement.executeUpdate()`メソッドを呼び出します。

String deleteSQL = "DELETE DBUSER WHERE USER__ID = ?";
PreparedStatement preparedStatement = dbConnection.prepareStatement(deleteSQL);
preparedStatement.setInt(1, 1001);//execute delete SQL stetement
preparedStatement.executeUpdate();

完全な例…​

package com.mkyong.jdbc;

import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class JDBCPreparedStatementSelectExample {

    private static final String DB__DRIVER = "oracle.jdbc.driver.OracleDriver";
    private static final String DB__CONNECTION = "jdbc:oracle:thin:@localhost:1521:MKYONG";
    private static final String DB__USER = "user";
    private static final String DB__PASSWORD = "password";

    public static void main(String[]argv) {

        try {

            deleteRecordFromTable();

        } catch (SQLException e) {

            System.out.println(e.getMessage());

        }

    }

    private static void deleteRecordFromTable() throws SQLException {

        Connection dbConnection = null;
        PreparedStatement preparedStatement = null;

        String deleteSQL = "DELETE DBUSER WHERE USER__ID = ?";

        try {
            dbConnection = getDBConnection();
            preparedStatement = dbConnection.prepareStatement(deleteSQL);
            preparedStatement.setInt(1, 1001);

           //execute delete SQL stetement
            preparedStatement.executeUpdate();

            System.out.println("Record is deleted!");

        } catch (SQLException e) {

            System.out.println(e.getMessage());

        } finally {

            if (preparedStatement != null) {
                preparedStatement.close();
            }

            if (dbConnection != null) {
                dbConnection.close();
            }

        }

    }

    private static Connection getDBConnection() {

        Connection dbConnection = null;

        try {

            Class.forName(DB__DRIVER);

        } catch (ClassNotFoundException e) {

            System.out.println(e.getMessage());

        }

        try {

            dbConnection = DriverManager.getConnection(
                            DB__CONNECTION, DB__USER,DB__PASSWORD);
            return dbConnection;

        } catch (SQLException e) {

            System.out.println(e.getMessage());

        }

        return dbConnection;

    }

}

結果

「user__id = 1001」のレコードがテーブルから削除されます。

リンク://タグ/削除/[削除]リンク://タグ/jdbc/[jdbc] preparestatement

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