JDBC连接Mysql的5种方式实例总结

public void connection01() throws SQLException {
    // 注册驱动
    Driver driver = new Driver();
    // 创建Properties对象，用于保存mysql账号和密码键值对
    Properties properties = new Properties();
    properties.setProperty("user", "root");
    properties.setProperty("password", "123456");
    String url = "jdbc:mysql://localhost:3306/test";
    // 得到mysql的连接
    Connection connection = driver.connect(url, properties);
    // 得到可以与mysql语句进行交互的对象
    Statement statement = connection.createStatement();
    // 关闭与 mysql语句进行交互的对象
    statement.close();
    // 关闭与mysql的连接
    connection.close();

public void connection02() throws ClassNotFoundException, InstantiationException, IllegalAccessException, SQLException {
    // 使用反射动态加载mysql驱动件程序
    Class<?> aClass = Class.forName("com.mysql.jdbc.Driver");
    Driver driver = (Driver) aClass.newInstance();
    // 创建Properties对象，用于保存mysql账号和密码键值对
    Properties properties = new Properties();
    properties.setProperty("user", "root");
    properties.setProperty("password", "123456");
    String url = "jdbc:mysql://localhost:3306/test";
    // 得到mysql的连接
    Connection connection = driver.connect(url, properties);
    // 得到可以与mysql语句进行交互的对象
    Statement statement = connection.createStatement();
    // 关闭与 mysql语句进行交互的对象
    statement.close();
    // 关闭与 mysql语句进行交互的对象
    connection.close();
}

public void connection03() throws ClassNotFoundException, InstantiationException, IllegalAccessException, SQLException {
	// 使用反射动态加载mysql驱动件程序
    Class<?> aClass = Class.forName("com.mysql.jdbc.Driver");
    Driver driver = (Driver) aClass.newInstance();
    String user = "root";
    String password = "123456";
    String url = "jdbc:mysql://localhost:3306/test";
    // 使用DriverManager加载Driver
    DriverManager.registerDriver(driver);
    // 得到mysql的连接
    Connection connection = DriverManager.getConnection(url, user, password);
    // 得到可以与mysql语句进行交互的对象
    Statement statement = connection.createStatement();
    // 关闭与 mysql语句进行交互的对象
    statement.close();
    // 关闭与 mysql语句进行交互的对象
    connection.close();
}

public void connection04() throws ClassNotFoundException, SQLException {
    // 使用反射动态加载mysql驱动件程序
    Class<?> aClass = Class.forName("com.mysql.jdbc.Driver");
    String user = "root";
    String password = "123456";
    String url = "jdbc:mysql://localhost:3306/test";
    // 得到mysql的连接
    Connection connection = DriverManager.getConnection(url, user, password);
    // 得到可以与mysql语句进行交互的对象
    Statement statement = connection.createStatement();
    // 关闭与 mysql语句进行交互的对象
    statement.close();
    // 关闭与 mysql语句进行交互的对象
    connection.close();
}

url=jdbc:mysql://localhost:3306/test
user=root
password=123456

public void connection05() throws SQLException, ClassNotFoundException, IOException {
    // 使用Properties读取配置文件下的内容
    Properties properties = new Properties();
    properties.load(new FileInputStream("src/com/mysql/mysql.properties"));
    String url = properties.getProperty("url");
    String user = properties.getProperty("user");
    String password = properties.getProperty("password");
    // 得到mysql的连接
    Connection connection = DriverManager.getConnection(url, user, password);
    // 得到可以与mysql语句进行交互的对象
    Statement statement = connection.createStatement();
    // 关闭与 mysql语句进行交互的对象
    statement.close();
    // 关闭与 mysql语句进行交互的对象
    connection.close();
}