3단계: Java를 사용하여 SQL에 연결하는 개념 증명

이 예제는 개념 증명으로만 간주해야 합니다. 이 샘플 코드는 명확한 이해를 돕기 위해 단순화되었으며 Microsoft에서 권장하는 모범 사례를 반드시 대표하는 것은 아닙니다.

1단계: 연결

연결 클래스를 사용하여 SQL 데이터베이스에 연결합니다.

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

public class SQLDatabaseConnection {
    // Connect to your database.
    // Replace server name, username, and password with your credentials
    public static void main(String[] args) {
        String connectionUrl =
                "jdbc:sqlserver://yourserver.database.windows.net:1433;"
                        + "database=AdventureWorks;"
                        + "user=yourusername@yourserver;"
                        + "password=<password>;"
                        + "encrypt=true;"
                        + "trustServerCertificate=false;"
                        + "loginTimeout=30;";

        try (Connection connection = DriverManager.getConnection(connectionUrl);) {
            // Code here.
        }
        // Handle any errors that may have occurred.
        catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

2단계: 쿼리 실행

이 샘플에서는 Azure SQL 데이터베이스에 연결하고 SELECT 문을 실행하여 선택한 행을 반환합니다.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class SQLDatabaseConnection {

    // Connect to your database.
    // Replace server name, username, and password with your credentials
    public static void main(String[] args) {
        String connectionUrl =
                "jdbc:sqlserver://yourserver.database.windows.net:1433;"
                + "database=AdventureWorks;"
                + "user=yourusername@yourserver;"
                + "password=<password>;"
                + "encrypt=true;"
                + "trustServerCertificate=false;"
                + "loginTimeout=30;";

        ResultSet resultSet = null;

        try (Connection connection = DriverManager.getConnection(connectionUrl);
                Statement statement = connection.createStatement();) {

            // Create and execute a SELECT SQL statement.
            String selectSql = "SELECT TOP 10 Title, FirstName, LastName from SalesLT.Customer";
            resultSet = statement.executeQuery(selectSql);

            // Print results from select statement
            while (resultSet.next()) {
                System.out.println(resultSet.getString(2) + " " + resultSet.getString(3));
            }
        }
        catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

3단계: 행 삽입

이 예제에서는 INSERT 문을 실행하고, 매개 변수를 전달하며, 자동 생성된 기본 키 값을 검색합니다.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class SQLDatabaseConnection {

    // Connect to your database.
    // Replace server name, username, and password with your credentials
    public static void main(String[] args) {
        String connectionUrl =
                "jdbc:sqlserver://yourserver.database.windows.net:1433;"
                        + "database=AdventureWorks;"
                        + "user=yourusername@yourserver;"
                        + "password=<password>;"
                        + "encrypt=true;"
                        + "trustServerCertificate=false;"
                        + "loginTimeout=30;";

        String insertSql = "INSERT INTO SalesLT.Product (Name, ProductNumber, Color, StandardCost, ListPrice, SellStartDate) VALUES "
                + "('NewBike', 'BikeNew', 'Blue', 50, 120, '2016-01-01');";

        ResultSet resultSet = null;

        try (Connection connection = DriverManager.getConnection(connectionUrl);
                PreparedStatement prepsInsertProduct = connection.prepareStatement(insertSql, Statement.RETURN_GENERATED_KEYS);) {

            prepsInsertProduct.execute();
            // Retrieve the generated key from the insert.
            resultSet = prepsInsertProduct.getGeneratedKeys();

            // Print the ID of the inserted row.
            while (resultSet.next()) {
                System.out.println("Generated: " + resultSet.getString(1));
            }
        }
        // Handle any errors that may have occurred.
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

참고 항목

• 샘플 JDBC 드라이버 애플리케이션