Paso 3: prueba de concepto de la conexión a SQL mediante Java
Solo debe considerarse a este ejemplo una prueba de concepto. El código de ejemplo se simplifica por claridad y no representa necesariamente los procedimientos recomendados que sugiere Microsoft.
Paso 1: Conectar
Utilice la clase de conexión para conectarse a SQL Database.
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=yourpassword;"
+ "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();
}
}
}
Paso 2: Ejecutar una consulta
En este ejemplo, se realiza una conexión a Azure SQL Database, se ejecuta una instrucción SELECT y se devuelven las filas seleccionadas.
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=yourpassword;"
+ "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();
}
}
}
Paso 3: Insertar una fila
En este ejemplo, se ejecuta una instrucción INSERT, se pasan parámetros y se recupera el valor de clave principal generado automáticamente.
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=yourpassword;"
+ "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();
}
}
}