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951bae3040
The Java samples have quite a lot of room for improvement.
I changed the following:
- make the code compile
- update the readme to point to the latest driver
- remove one leading tab from every line
- remove redundant imports
- use Java 7 try-with-resources
- release database objects as early as possible
- propagate exceptions
- use bind parameters to avoid SQL-injection vulnerabilities when the
code is copy and pasted and adjusted
- I had to guess on some of the parameter types since I didn't have a
schema. I had a look at ql_in-memory_oltp_sample.sql. Executable
samples with a continuous integration build would be a nice future
improvement.
61 lines
2.0 KiB
Java
61 lines
2.0 KiB
Java
// Use the JDBC driver
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import java.math.BigDecimal;
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import java.sql.*;
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import java.time.LocalDate;
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public class connect {
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// Connect to your database.
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// Replace server name, username, and password with your credentials
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public static void main(String[] args) throws SQLException {
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String connectionString =
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"jdbc:<your_servername>;"
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+ "database=<your_databasename>;"
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+ "user=<your_username@your_servername>;"
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+ "password=<your_password>;"
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+ "encrypt=true;"
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+ "trustServerCertificate=false;"
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+ "loginTimeout=30;";
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try (Connection connection = DriverManager.getConnection(connectionString)) {
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// Create and execute a SELECT SQL statement.
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String selectSql = "SELECT TOP 10 Title, FirstName, LastName from SalesLT.Customer";
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try (Statement statement = connection.createStatement();
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ResultSet resultSet = statement.executeQuery(selectSql)) {
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// Print results from select statement
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while (resultSet.next()) {
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System.out.println(resultSet.getString(2) + " "
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+ resultSet.getString(3));
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}
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}
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// Create and execute an INSERT SQL prepared statement.
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String insertSql = "INSERT INTO SalesLT.Product (Name, ProductNumber, Color, StandardCost, ListPrice, SellStartDate) VALUES "
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+ "(?, ?, ?, ?, ?, ?);";
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try (PreparedStatement prepsInsertProduct = connection.prepareStatement(
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insertSql,
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Statement.RETURN_GENERATED_KEYS)) {
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prepsInsertProduct.setString(1, "Bike");
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prepsInsertProduct.setString(2, "B1");
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prepsInsertProduct.setString(3, "Blue");
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prepsInsertProduct.setBigDecimal(4, new BigDecimal(50));
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prepsInsertProduct.setBigDecimal(5, new BigDecimal(120));
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prepsInsertProduct.setObject(6, LocalDate.of(2016, 1, 1).atStartOfDay());
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prepsInsertProduct.executeUpdate();
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// Retrieve the generated key from the insert.
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try (ResultSet generatedKeys = prepsInsertProduct.getGeneratedKeys()) {
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// Print the ID of the inserted row.
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while (generatedKeys.next()) {
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System.out.println("Generated: " + generatedKeys.getString(1));
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}
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}
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}
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}
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}
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}
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