JDBC PreparedStatementの例 - レコードを挿入する

package com.example.jdbc.preparestatement.row;

import java.math.BigDecimal;
import java.sql.*;
import java.time.LocalDateTime;

public class RowInsert {

    private static final String SQL_INSERT = "INSERT INTO EMPLOYEE (NAME, SALARY, CREATED_DATE) VALUES (?,?,?)";

    public static void main(String[] args) {

        try (Connection conn = DriverManager.getConnection(
                "jdbc:postgresql://127.0.0.1:5432/test", "postgres", "password");
             PreparedStatement preparedStatement = conn.prepareStatement(SQL_INSERT)) {

            preparedStatement.setString(1, "example");
            preparedStatement.setBigDecimal(2, new BigDecimal(799.88));
            preparedStatement.setTimestamp(3, Timestamp.valueOf(LocalDateTime.now()));

            int row = preparedStatement.executeUpdate();

            // rows affected
            System.out.println(row); //1

        } catch (SQLException e) {
            System.err.format("SQL State: %s\n%s", e.getSQLState(), e.getMessage());
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

CREATE TABLE EMPLOYEE
(
    ID serial,
    NAME varchar(100) NOT NULL,
    SALARY numeric(15, 2) NOT NULL,
    CREATED_DATE timestamp with time zone NOT NULL DEFAULT CURRENT_TIMESTAMP
    PRIMARY KEY (ID)
);

    
        org.postgresql
        postgresql
        42.2.5